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Fencer Vulns
high 8.2

CVE-2023-39191 json

Kernel: ebpf: insufficient stack type checks in dynptr

published 2023-10-04 3 y ago modified 2026-11-07 46 h ago also EUVD-2023-42926

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

An improper input validation flaw was found in the eBPF subsystem in the Linux kernel. The issue occurs due to a lack of proper validation of dynamic pointers within user-supplied eBPF programs prior to executing them. This may allow an attacker with CAP_BPF privileges to escalate privileges and execute arbitrary code in the context of the kernel.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-362.8.1.el9_3
  • Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support 0:5.14.0-284.48.1.el9_2, 0:5.14.0-284.48.1.rt14.333.el9_2
  • linux Debian 14, Debian 13 6.3.7-1

debian advisories DEBIAN-CVE-2023-39191

  • kernel RHEL 9 5.14.0-362.8.1.el9_3
  • rv RHEL 9 5.14.0-362.8.1.el9_3
  • perf RHEL 9 5.14.0-362.8.1.el9_3
  • rtla RHEL 9 5.14.0-362.8.1.el9_3
  • bpftool RHEL 9 7.2.0-362.8.1.el9_3
  • libperf RHEL 9 5.14.0-362.8.1.el9_3
  • kernel-rt RHEL 9 5.14.0-362.8.1.el9_3
  • kernel-64k RHEL 9 5.14.0-362.8.1.el9_3

red hat advisories RHSA-2024:0439RHSA-2024:0448RHSA-2024:0381RHSA-2023:6583

  • kernel-azure SLE Module for Public Cloud 15 SP5, openSUSE Leap 15.5 5.14.21-150500.33.23.1
  • kernel-syms-azure SLE Module for Public Cloud 15 SP5, openSUSE Leap 15.5 5.14.21-150500.33.23.1
  • kernel-source-azure SLE Module for Public Cloud 15 SP5, openSUSE Leap 15.5 5.14.21-150500.33.23.1
  • dtb-aarch64 openSUSE Leap 15.5 5.14.21-150500.55.36.1
  • kernel-64kb SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.36.1
  • kernel-syms SLE Module for Development Tools 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.36.1
  • kernel-obs-qa openSUSE Leap 15.5 5.14.21-150500.55.36.1
  • kernel-source SLE Module for Development Tools 15 SP5, SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.36.1

suse advisories SUSE-SU-2024:1097-1SUSE-SU-2024:1045-1SUSE-SU-2024:1039-1SUSE-SU-2024:1023-1SUSE-SU-2024:0995-1SUSE-SU-2024:0986-1

  • kernel CBL-Mariner 2.0 5.15.137.1-1

azure linux advisories AZL-31150

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-2023-39191 updated cvss 8.2

kernel: eBPF: insufficient stack type checks in dynptr

  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder (v. 9) libperf 5.14.0-362.8.1.el9_3, kernel-debuginfo-common-s390x 5.14.0-362.8.1.el9_3, kernel-debuginfo-common-x86_64 5.14.0-362.8.1.el9_3, kernel-debuginfo-common-aarch64 5.14.0-362.8.1.el9_3, kernel-debuginfo-common-ppc64le 5.14.0-362.8.1.el9_3
    fixed: vendor fix RHSA-2023:6583
  • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.48.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.48.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.48.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.48.1.el9_2
    fixed: vendor fix RHSA-2024:0448
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-362.8.1.el9_3, perf 5.14.0-362.8.1.el9_3, rtla 5.14.0-362.8.1.el9_3, kernel-devel-matched 5.14.0-362.8.1.el9_3, kernel-64k-devel-matched 5.14.0-362.8.1.el9_3, kernel-debug-devel-matched 5.14.0-362.8.1.el9_3, +6 more
    fixed: vendor fix RHSA-2023:6583
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.48.1.el9_2, rtla 5.14.0-284.48.1.el9_2, kernel-devel-matched 5.14.0-284.48.1.el9_2, kernel-64k-devel-matched 5.14.0-284.48.1.el9_2, kernel-debug-devel-matched 5.14.0-284.48.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.48.1.el9_2, +5 more
    fixed: vendor fix RHSA-2024:0448
  • Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.2.0-362.8.1.el9_3, kernel 5.14.0-362.8.1.el9_3, kernel-64k 5.14.0-362.8.1.el9_3, kernel-core 5.14.0-362.8.1.el9_3, kernel-tools 5.14.0-362.8.1.el9_3, python3-perf 5.14.0-362.8.1.el9_3, +28 more
    fixed: vendor fix RHSA-2023:6583
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.48.1.el9_2, kernel 5.14.0-284.48.1.el9_2, kernel-64k 5.14.0-284.48.1.el9_2, kernel-core 5.14.0-284.48.1.el9_2, kernel-tools 5.14.0-284.48.1.el9_2, python3-perf 5.14.0-284.48.1.el9_2, +32 more
    fixed: vendor fix RHSA-2024:0448
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-362.8.1.el9_3, kernel-rt-core 5.14.0-362.8.1.el9_3, kernel-rt-modules 5.14.0-362.8.1.el9_3, kernel-rt-debug-core 5.14.0-362.8.1.el9_3, kernel-rt-modules-core 5.14.0-362.8.1.el9_3, kernel-rt-debug-modules 5.14.0-362.8.1.el9_3, +4 more
    fixed: vendor fix RHSA-2023:6583
show 4 more
  • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-core 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-modules 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-core 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-modules-core 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-modules 5.14.0-284.48.1.rt14.333.el9_2, +4 more
    fixed: vendor fix RHSA-2024:0439
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-362.8.1.el9_3, kernel-rt-kvm 5.14.0-362.8.1.el9_3, kernel-rt-core 5.14.0-362.8.1.el9_3, kernel-rt-modules 5.14.0-362.8.1.el9_3, kernel-rt-debug-kvm 5.14.0-362.8.1.el9_3, kernel-rt-debug-core 5.14.0-362.8.1.el9_3, +6 more
    fixed: vendor fix RHSA-2023:6583
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-kvm 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-core 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-modules 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-kvm 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-core 5.14.0-284.48.1.rt14.333.el9_2, +6 more
    fixed: vendor fix RHSA-2024:0439
  • 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 Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-doc 5.14.0-284.48.1.el9_2
    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
none
Automatable
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8

Classification

Weakness
  • CWE-20 Improper Input Validation
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.