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Fencer Vulns
high 7.8

CVE-2022-1055 json

Use after Free in tc_new_tfilter allowing for privilege escalation in Linux Kernel

published 2022-03-29 4 y ago modified 2026-08-13 2 mo ago also EUVD-2022-24401

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

A use-after-free exists in the Linux Kernel in tc_new_tfilter that could allow a local attacker to gain privilege escalation. The exploit requires unprivileged user namespaces. We recommend upgrading past commit 04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5

Patch / fix

  • Linux Kernel 5.4.177, 5.10.97, 5.15.20, 5.16.6, 5.17.0
  • linux linux_kernel 5.17_rc3
  • linux Debian 14, Debian 13, Debian 12 5.16.7-1

debian advisories DEBIAN-CVE-2022-1055

  • linux Ubuntu 20.04 LTS 5.4.0-107.121
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1071.76
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1069.73
  • linux-gke Ubuntu 20.04 LTS 5.4.0-1067.70
  • linux-ibm Ubuntu 20.04 LTS 5.4.0-1019.21
  • linux-iot Ubuntu 20.04 LTS 5.4.0-1004.6
  • linux-kvm Ubuntu 20.04 LTS 5.4.0-1061.64
  • linux-azure Ubuntu 20.04 LTS 5.4.0-1074.77

ubuntu advisories UBUNTU-CVE-2022-1055

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

  • perf rhev hypervisor 4.4, RHEL 8.6 EUS 4.18.0-372.95.1.el8_6
  • kernel RHEL 8 4.18.0-425.3.1.el8
  • perf RHEL 8 4.18.0-425.3.1.el8
  • bpftool RHEL 8 4.18.0-425.3.1.el8
  • kernel-core RHEL 8 4.18.0-425.3.1.el8
  • kernel-tools RHEL 8 4.18.0-425.3.1.el8
  • python3-perf RHEL 8 4.18.0-425.3.1.el8
  • kernel-modules RHEL 8 4.18.0-425.3.1.el8

red hat advisories RHSA-2024:1188RHSA-2022:7683RHSA-2022:7444RHSA-2022:6002RHSA-2022:6003

  • kernel-rt SLE Micro 5.2, SLE Micro 5.1, Real Time Module 15 SP3 5.3.18-150300.85.1
  • kernel-syms-rt Real Time Module 15 SP3 5.3.18-150300.85.1
  • kernel-rt_debug Real Time Module 15 SP3 5.3.18-150300.85.1
  • kernel-source-rt Real Time Module 15 SP3 5.3.18-150300.85.1
  • kernel-rt SLE Micro 5.0, Real Time Module 15 SP2 5.3.18-150200.79.2
  • kernel-syms-rt Real Time Module 15 SP2 5.3.18-150200.79.1
  • kernel-rt_debug Real Time Module 15 SP2 5.3.18-150200.79.2
  • kernel-source-rt Real Time Module 15 SP2 5.3.18-150200.79.2

suse advisories SUSE-SU-2022:1453-1SUSE-SU-2022:1407-1SUSE-SU-2022:1369-1SUSE-SU-2022:1326-1SUSE-SU-2022:1257-1SUSE-SU-2022:1197-1

  • kernel-rt AlmaLinux 8 4.18.0-425.3.1.rt7.213.el8
  • kernel-rt-kvm AlmaLinux 8 4.18.0-425.3.1.rt7.213.el8
  • kernel-rt-core AlmaLinux 8 4.18.0-425.3.1.rt7.213.el8
  • kernel-rt-modules AlmaLinux 8 4.18.0-425.3.1.rt7.213.el8
  • kernel-rt-debug-kvm AlmaLinux 8 4.18.0-425.3.1.rt7.213.el8
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-425.3.1.rt7.213.el8
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-425.3.1.rt7.213.el8
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-425.3.1.rt7.213.el8

almalinux advisories ALSA-2022:7444ALSA-2022:7683ALSA-2022:6002ALSA-2022:6003

  • kernel Rocky Linux 8 4.18.0-425.3.1.el8
  • kernel-rt Rocky Linux 8 4.18.0-425.3.1.rt7.213.el8

rocky linux advisories RLSA-2022:7683RLSA-2022:7444

  • kernel CBL-Mariner 2.0 5.15.32.1-3

azure linux advisories AZL-9218

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

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-2022-1055 updated cvss 7.8

kernel: use-after-free in tc_new_tfilter() in net/sched/cls_api.c

  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-425.3.1.el8, kernel-debuginfo-common-aarch64 4.18.0-425.3.1.el8, kernel-debuginfo-common-ppc64le 4.18.0-425.3.1.el8
    fixed: vendor fix RHSA-2022:7683
  • Red Hat CodeReady Linux Builder (v. 9) kernel-debuginfo-common-s390x 5.14.0-70.22.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.22.1.el9_0, kernel-debuginfo-common-aarch64 5.14.0-70.22.1.el9_0, kernel-debuginfo-common-ppc64le 5.14.0-70.22.1.el9_0
    fixed: vendor fix RHSA-2022:6003
  • Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-debuginfo-common-x86_64 4.18.0-372.95.1.el8_6, kernel-debuginfo-common-aarch64 4.18.0-372.95.1.el8_6, kernel-debuginfo-common-ppc64le 4.18.0-372.95.1.el8_6
    fixed: vendor fix RHSA-2024:1188
  • Red Hat Enterprise Linux AppStream (v. 9) perf 5.14.0-70.22.1.el9_0, kernel-devel-matched 5.14.0-70.22.1.el9_0, kernel-debug-devel-matched 5.14.0-70.22.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.22.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.22.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.22.1.el9_0, +2 more
    fixed: vendor fix RHSA-2022:6003
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-425.3.1.el8, kernel 4.18.0-425.3.1.el8, bpftool 4.18.0-425.3.1.el8, kernel-core 4.18.0-425.3.1.el8, kernel-tools 4.18.0-425.3.1.el8, python3-perf 4.18.0-425.3.1.el8, +15 more
    fixed: vendor fix RHSA-2022:7683
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-70.22.1.el9_0, bpftool 5.14.0-70.22.1.el9_0, kernel-core 5.14.0-70.22.1.el9_0, kernel-tools 5.14.0-70.22.1.el9_0, python3-perf 5.14.0-70.22.1.el9_0, kernel-modules 5.14.0-70.22.1.el9_0, +14 more
    fixed: vendor fix RHSA-2022:6003
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6) perf 4.18.0-372.95.1.el8_6, kernel 4.18.0-372.95.1.el8_6, bpftool 4.18.0-372.95.1.el8_6, kernel-core 4.18.0-372.95.1.el8_6, kernel-tools 4.18.0-372.95.1.el8_6, python3-perf 4.18.0-372.95.1.el8_6, +15 more
    fixed: vendor fix RHSA-2024:1188
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-425.3.1.rt7.213.el8, kernel-rt-core 4.18.0-425.3.1.rt7.213.el8, kernel-rt-modules 4.18.0-425.3.1.rt7.213.el8, kernel-rt-debug-core 4.18.0-425.3.1.rt7.213.el8, kernel-rt-debug-modules 4.18.0-425.3.1.rt7.213.el8, kernel-rt-modules-extra 4.18.0-425.3.1.rt7.213.el8, +2 more
    fixed: vendor fix RHSA-2022:7444
show 5 more
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-70.22.1.rt21.94.el9_0, kernel-rt-core 5.14.0-70.22.1.rt21.94.el9_0, kernel-rt-modules 5.14.0-70.22.1.rt21.94.el9_0, kernel-rt-debug-core 5.14.0-70.22.1.rt21.94.el9_0, kernel-rt-debug-modules 5.14.0-70.22.1.rt21.94.el9_0, kernel-rt-modules-extra 5.14.0-70.22.1.rt21.94.el9_0, +2 more
    fixed: vendor fix RHSA-2022:6002
  • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-425.3.1.rt7.213.el8, kernel-rt-kvm 4.18.0-425.3.1.rt7.213.el8, kernel-rt-core 4.18.0-425.3.1.rt7.213.el8, kernel-rt-modules 4.18.0-425.3.1.rt7.213.el8, kernel-rt-debug-kvm 4.18.0-425.3.1.rt7.213.el8, kernel-rt-debug-core 4.18.0-425.3.1.rt7.213.el8, +4 more
    fixed: vendor fix RHSA-2022:7444
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-70.22.1.rt21.94.el9_0, kernel-rt-kvm 5.14.0-70.22.1.rt21.94.el9_0, kernel-rt-core 5.14.0-70.22.1.rt21.94.el9_0, kernel-rt-modules 5.14.0-70.22.1.rt21.94.el9_0, kernel-rt-debug-kvm 5.14.0-70.22.1.rt21.94.el9_0, kernel-rt-debug-core 5.14.0-70.22.1.rt21.94.el9_0, +4 more
    fixed: vendor fix RHSA-2022:6002
  • Red Hat Virtualization 4 Hypervisor for RHEL 8 perf 4.18.0-372.95.1.el8_6, kernel-debuginfo-common-x86_64 4.18.0-372.95.1.el8_6
    fixed: vendor fix RHSA-2024:1188
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    not affected: vulnerable code not present

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

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • syzkaller.appspot.com https://syzkaller.appspot.com/bug?id=2212474c958978ab86525fe6832ac8102c309ffc referenced PoC, tagged "exploit" by a source, unverified
  • kernel.dance https://kernel.dance/#04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 8.6 CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
CNA 4.0 8.6 CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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

Affected products

  • Linux Kernel
  • linux linux_kernel

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.