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Fencer Vulns
high 7.8

CVE-2021-33034 json

In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409.

published 2021-05-14 5 y ago modified 2026-08-13 2 mo ago also EUVD-2021-19754

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value.

Patch / fix

  • linux linux_kernel 4.4.269, 4.9.269, 4.14.233, 4.19.191, 5.4.119, 5.10.37, 5.11.21, 5.12.4
  • linux Debian 14, Debian 13, Debian 12 5.10.38-1

debian advisories DEBIAN-CVE-2021-33034

  • linux Ubuntu 18.04 LTS 4.15.0-151.157
  • linux Ubuntu 20.04 LTS 5.4.0-77.86
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1109.116
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1051.53
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1046.49
  • linux-gke Ubuntu 20.04 LTS 5.4.0-1046.48
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1097.99
  • linux-kvm Ubuntu 20.04 LTS 5.4.0-1041.42

ubuntu advisories UBUNTU-CVE-2021-33034

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • redhat-virtualization-host rhev hypervisor 4.4 4.4.7-20210715.1.el8_4
  • redhat-virtualization-host-image-update rhev hypervisor 4.4 4.4.7-20210715.1.el8_4
  • kernel RHEL 7 3.10.0-1160.36.2.el7
  • perf RHEL 7 3.10.0-1160.36.2.el7
  • bpftool RHEL 7 3.10.0-1160.36.2.el7
  • python-perf RHEL 7 3.10.0-1160.36.2.el7
  • kernel-kdump RHEL 7 3.10.0-1160.36.2.el7
  • kernel-tools RHEL 7 3.10.0-1160.36.2.el7

red hat advisories RHSA-2021:2736RHSA-2021:2725RHSA-2021:2726RHSA-2021:2729RHSA-2021:2728RHSA-2021:2737

  • kernel-syms SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +3 more 4.4.180-94.147.1
  • kernel-source SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +3 more 4.4.180-94.147.1
  • kernel-default SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +4 more 4.4.180-94.147.1
  • kgraft-patch-SLE12-SP3_Update_40 SLES for SAP 12 SP3, SLES 12 SP3-LTSS, OpenStack Cloud Crowbar 8 +2 more 1-4.3.1
  • kernel-syms SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.75.1
  • kernel-source SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.75.1
  • kernel-default SLES for SAP 15, SLES 15-LTSS, SLE Live Patching 15 +3 more 4.12.14-150.75.1
  • kernel-vanilla SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.75.1

suse advisories SUSE-SU-2021:2577-1SUSE-SU-2021:2451-1SUSE-SU-2021:2421-1SUSE-SU-2021:2406-1SUSE-SU-2021:2208-1SUSE-SU-2021:2198-1

  • kernel-64kb openSUSE Leap 15.3 5.3.18-59.5.2
  • kernel-syms openSUSE Leap 15.3 5.3.18-59.5.1
  • kernel-obs-qa openSUSE Leap 15.3 5.3.18-59.5.1
  • kernel-source openSUSE Leap 15.3 5.3.18-59.5.2
  • kernel-default openSUSE Leap 15.3 5.3.18-59.5.2
  • kernel-preempt openSUSE Leap 15.3 5.3.18-59.5.2
  • kernel-kvmsmall openSUSE Leap 15.3 5.3.18-59.5.2
  • kernel-zfcpdump openSUSE Leap 15.3 5.3.18-59.5.2

opensuse advisories openSUSE-SU-2021:1977-1openSUSE-SU-2021:1975-1openSUSE-SU-2021:0947-1openSUSE-SU-2021:0843-1

  • kernel Rocky Linux 8 4.18.0-305.7.1.el8_4

rocky linux advisories RLSA-2021:2570

  • kernel CBL-Mariner 2.0 5.10.78.1-1

azure linux advisories AZL-6562

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • linux Arch Linux 5.12.4.arch1-1
  • linux-zen Arch Linux 5.12.4.zen1-1
  • linux-hardened Arch Linux 5.11.21.hardened1-1
  • linux-lts Arch Linux 5.10.37-1

arch linux advisories AVG-1958AVG-1959AVG-1960AVG-1961

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-33034 updated cvss 7.7

kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan

  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-305.7.1.el8_4, kernel-debuginfo-common-aarch64 4.18.0-305.7.1.el8_4, kernel-debuginfo-common-ppc64le 4.18.0-305.7.1.el8_4
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2570
  • Red Hat CodeReady Linux Builder EUS (v. 8.1) kernel-debuginfo-common-x86_64 4.18.0-147.51.1.el8_1, kernel-debuginfo-common-aarch64 4.18.0-147.51.1.el8_1, kernel-debuginfo-common-ppc64le 4.18.0-147.51.1.el8_1
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2666
  • Red Hat CodeReady Linux Builder EUS (v. 8.2) kernel-debuginfo-common-x86_64 4.18.0-193.60.2.el8_2, kernel-debuginfo-common-aarch64 4.18.0-193.60.2.el8_2, kernel-debuginfo-common-ppc64le 4.18.0-193.60.2.el8_2
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2718
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-305.7.1.el8_4, kernel 4.18.0-305.7.1.el8_4, bpftool 4.18.0-305.7.1.el8_4, kpatch-patch-4_18_0-305 1-2.el8, kernel-core 4.18.0-305.7.1.el8_4, kernel-tools 4.18.0-305.7.1.el8_4, +17 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2570
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) perf 4.18.0-147.51.1.el8_1, kernel 4.18.0-147.51.1.el8_1, bpftool 4.18.0-147.51.1.el8_1, kernel-core 4.18.0-147.51.1.el8_1, kernel-tools 4.18.0-147.51.1.el8_1, python3-perf 4.18.0-147.51.1.el8_1, +23 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2666
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) perf 4.18.0-193.60.2.el8_2, kernel 4.18.0-193.60.2.el8_2, bpftool 4.18.0-193.60.2.el8_2, kernel-core 4.18.0-193.60.2.el8_2, kernel-tools 4.18.0-193.60.2.el8_2, python3-perf 4.18.0-193.60.2.el8_2, +27 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2718
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1160.36.2.el7, kernel 3.10.0-1160.36.2.el7, bpftool 3.10.0-1160.36.2.el7, python-perf 3.10.0-1160.36.2.el7, kernel-tools 3.10.0-1160.36.2.el7, kernel-tools-libs 3.10.0-1160.36.2.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.36.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2725
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) perf 3.10.0-1062.52.2.el7, kernel 3.10.0-1062.52.2.el7, bpftool 3.10.0-1062.52.2.el7, python-perf 3.10.0-1062.52.2.el7, kernel-tools 3.10.0-1062.52.2.el7, kernel-tools-libs 3.10.0-1062.52.2.el7, +2 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2728
show 29 more
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.36.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2725
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-debuginfo-common-x86_64 3.10.0-1062.52.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2728
  • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-1160.36.2.rt56.1179.el7, kernel-rt-trace 3.10.0-1160.36.2.rt56.1179.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.36.2.rt56.1179.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1160.36.2.rt56.1179.el7, kernel-rt-kvm 3.10.0-1160.36.2.rt56.1179.el7, kernel-rt-trace 3.10.0-1160.36.2.rt56.1179.el7, kernel-rt-debug-kvm 3.10.0-1160.36.2.rt56.1179.el7, kernel-rt-trace-kvm 3.10.0-1160.36.2.rt56.1179.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.36.2.rt56.1179.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2726
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-305.7.1.rt7.79.el8_4, kernel-rt-core 4.18.0-305.7.1.rt7.79.el8_4, kernel-rt-modules 4.18.0-305.7.1.rt7.79.el8_4, kernel-rt-debug-core 4.18.0-305.7.1.rt7.79.el8_4, kernel-rt-debug-modules 4.18.0-305.7.1.rt7.79.el8_4, kernel-rt-modules-extra 4.18.0-305.7.1.rt7.79.el8_4, +2 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2599
  • Red Hat Enterprise Linux Real Time EUS (v. 8.2) kernel-rt 4.18.0-193.60.2.rt13.112.el8_2, kernel-rt-core 4.18.0-193.60.2.rt13.112.el8_2, kernel-rt-modules 4.18.0-193.60.2.rt13.112.el8_2, kernel-rt-debug-core 4.18.0-193.60.2.rt13.112.el8_2, kernel-rt-debug-modules 4.18.0-193.60.2.rt13.112.el8_2, kernel-rt-modules-extra 4.18.0-193.60.2.rt13.112.el8_2, +2 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2719
  • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-305.7.1.rt7.79.el8_4, kernel-rt-kvm 4.18.0-305.7.1.rt7.79.el8_4, kernel-rt-core 4.18.0-305.7.1.rt7.79.el8_4, kernel-rt-modules 4.18.0-305.7.1.rt7.79.el8_4, kernel-rt-debug-kvm 4.18.0-305.7.1.rt7.79.el8_4, kernel-rt-debug-core 4.18.0-305.7.1.rt7.79.el8_4, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2599
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) kernel-rt 4.18.0-193.60.2.rt13.112.el8_2, kernel-rt-kvm 4.18.0-193.60.2.rt13.112.el8_2, kernel-rt-core 4.18.0-193.60.2.rt13.112.el8_2, kernel-rt-modules 4.18.0-193.60.2.rt13.112.el8_2, kernel-rt-debug-kvm 4.18.0-193.60.2.rt13.112.el8_2, kernel-rt-debug-core 4.18.0-193.60.2.rt13.112.el8_2, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2719
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1160.36.2.el7, kernel 3.10.0-1160.36.2.el7, bpftool 3.10.0-1160.36.2.el7, kpatch-patch-3_10_0-1160 1-7.el7, python-perf 3.10.0-1160.36.2.el7, kernel-kdump 3.10.0-1160.36.2.el7, +17 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2725
  • Red Hat Enterprise Linux Server AUS (v. 7.2) perf 3.10.0-327.98.2.el7, kernel 3.10.0-327.98.2.el7, python-perf 3.10.0-327.98.2.el7, kernel-tools 3.10.0-327.98.2.el7, kernel-tools-libs 3.10.0-327.98.2.el7, kernel-abi-whitelists 3.10.0-327.98.2.el7, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2734
  • Red Hat Enterprise Linux Server AUS (v. 7.3) perf 3.10.0-514.90.2.el7, kernel 3.10.0-514.90.2.el7, python-perf 3.10.0-514.90.2.el7, kernel-tools 3.10.0-514.90.2.el7, kernel-tools-libs 3.10.0-514.90.2.el7, kernel-abi-whitelists 3.10.0-514.90.2.el7, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2733
  • Red Hat Enterprise Linux Server AUS (v. 7.4) perf 3.10.0-693.90.2.el7, kernel 3.10.0-693.90.2.el7, python-perf 3.10.0-693.90.2.el7, kernel-tools 3.10.0-693.90.2.el7, kernel-tools-libs 3.10.0-693.90.2.el7, kernel-abi-whitelists 3.10.0-693.90.2.el7, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2732
  • Red Hat Enterprise Linux Server AUS (v. 7.6) perf 3.10.0-957.78.2.el7, kernel 3.10.0-957.78.2.el7, bpftool 3.10.0-957.78.2.el7, python-perf 3.10.0-957.78.2.el7, kernel-tools 3.10.0-957.78.2.el7, kernel-tools-libs 3.10.0-957.78.2.el7, +2 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2730
  • Red Hat Enterprise Linux Server E4S (v. 7.4) perf 3.10.0-693.90.2.el7, kernel 3.10.0-693.90.2.el7, python-perf 3.10.0-693.90.2.el7, kernel-tools 3.10.0-693.90.2.el7, kernel-tools-libs 3.10.0-693.90.2.el7, kernel-bootwrapper 3.10.0-693.90.2.el7, +3 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2732
  • Red Hat Enterprise Linux Server E4S (v. 7.6) perf 3.10.0-957.78.2.el7, kernel 3.10.0-957.78.2.el7, python-perf 3.10.0-957.78.2.el7, kernel-tools 3.10.0-957.78.2.el7, kpatch-patch-3_10_0-957_58_2 1-4.el7, kpatch-patch-3_10_0-957_61_1 1-4.el7, +12 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2730
  • Red Hat Enterprise Linux Server EUS (v. 7.7) perf 3.10.0-1062.52.2.el7, kernel 3.10.0-1062.52.2.el7, bpftool 3.10.0-1062.52.2.el7, python-perf 3.10.0-1062.52.2.el7, kernel-kdump 3.10.0-1062.52.2.el7, kernel-tools 3.10.0-1062.52.2.el7, +19 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2728
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1160.36.2.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.36.2.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.36.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2725
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.2) kernel-debuginfo-common-x86_64 3.10.0-327.98.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2734
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) kernel-debuginfo-common-x86_64 3.10.0-514.90.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2733
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.90.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2732
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.6) kernel-debuginfo-common-x86_64 3.10.0-957.78.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2730
  • Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.90.2.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.90.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2732
  • Red Hat Enterprise Linux Server Optional E4S (v. 7.6) kernel-debuginfo-common-x86_64 3.10.0-957.78.2.el7, kernel-debuginfo-common-ppc64le 3.10.0-957.78.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2730
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debuginfo-common-ppc64 3.10.0-1062.52.2.el7, kernel-debuginfo-common-x86_64 3.10.0-1062.52.2.el7, kernel-debuginfo-common-ppc64le 3.10.0-1062.52.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2728
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.90.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2732
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.6) kernel-debuginfo-common-x86_64 3.10.0-957.78.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2730
  • Red Hat Enterprise Linux Server TUS (v. 7.4) perf 3.10.0-693.90.2.el7, kernel 3.10.0-693.90.2.el7, python-perf 3.10.0-693.90.2.el7, kernel-tools 3.10.0-693.90.2.el7, kernel-tools-libs 3.10.0-693.90.2.el7, kernel-abi-whitelists 3.10.0-693.90.2.el7, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2732
  • Red Hat Enterprise Linux Server TUS (v. 7.6) perf 3.10.0-957.78.2.el7, kernel 3.10.0-957.78.2.el7, bpftool 3.10.0-957.78.2.el7, python-perf 3.10.0-957.78.2.el7, kernel-tools 3.10.0-957.78.2.el7, kernel-tools-libs 3.10.0-957.78.2.el7, +2 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2730
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1160.36.2.el7, kernel 3.10.0-1160.36.2.el7, bpftool 3.10.0-1160.36.2.el7, python-perf 3.10.0-1160.36.2.el7, kernel-tools 3.10.0-1160.36.2.el7, kernel-tools-libs 3.10.0-1160.36.2.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.36.2.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2021:2725
  • Red Hat Migration Toolkit 1.4 rhmtc/openshift-migration-ui-rhel8 v1.4.6-4, rhmtc/openshift-velero-plugin-rhel8 v1.4.6-4, rhmtc/openshift-migration-velero-rhel8 v1.4.6-5, rhmtc/openshift-migration-registry-rhel8 v1.4.6-4, rhmtc/openshift-migration-operator-bundle v1.4.6-5, rhmtc/openshift-migration-controller-rhel8 v1.4.6-4, +7 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHBA-2021:2854

3 more fixed, 6 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • syzkaller.appspot.com https://syzkaller.appspot.com/bug?id=2e1943a94647f7732dd6fc60368642d6e8dc91b1 referenced PoC, tagged "exploit" by a source, unverified
  • sites.google.com https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-hci_send_acl referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.