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Public proof of conceptFix available

CVE-2023-6931

A public proof of concept exists; no exploitation attested.

  • Published2023-12-19
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A heap out-of-bounds write vulnerability in the Linux kernel's Performance Events system component can be exploited to achieve local privilege escalation. A perf_event's read_size can overflow, leading to an heap out-of-bounds increment or write in perf_read_group(). We recommend upgrading past commit 382c27f4ed28f803b1f1473ac2d8db0afc795a1b.

Timeline

dates in UTC
  1. 2023-12-1914:15CVE publishedNVD

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
Linux linux kernel
BranchAffectedFixed in
6.7≥ 4.3, < 6.76.7

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • bpftoolTuxCare:AlmaLinux:9.2all versions · fixed in 7.0.0-284.30.1.el9_2.tuxcare.els2
  • bpftoolRed Hat:rhel_eus:9.2::baseosall versions · fixed in 0:7.0.0-284.55.1.el9_2and 1 other package
  • bpftoolRed Hat:enterprise_linux:9::baseosall versions · fixed in 0:7.3.0-427.13.1.el9_4and 1 other package
  • bpftoolAlmaLinux:9all versions · fixed in 7.3.0-427.13.1.el9_4
  • bpftool-debuginfoRed Hat:rhel_eus:9.2::crball versions · fixed in 0:7.0.0-284.55.1.el9_2
  • bpftool-debuginfoRed Hat:rhel_eus:9.2::appstreamall versions · fixed in 0:7.0.0-284.55.1.el9_2
  • bpftool-debuginfoRed Hat:enterprise_linux:9::realtimeall versions · fixed in 0:7.3.0-427.13.1.el9_4
  • bpftool-debuginfoRed Hat:enterprise_linux:9::nfvall versions · fixed in 0:7.3.0-427.13.1.el9_4

174 more package ranges on OSV.dev

Vendor advisories

  • CVE-2023-6931 Red Hat Product Security1,171 products fixed · 50 known affected

    kernel: Out of boundary write in perf_read_group() as result of overflow a perf_event's read_size

    bpftool as a component of Red Hat Enterprise Linux 7 · kernel as a component of Red Hat Enterprise Linux 7 · kernel-abi-whitelists as a component of Red Hat Enterprise Linux 7 · +47 more

  • ICSA-25-226-15 CISA

    Siemens SINEC OS

  • SSA-613116 Siemens ProductCERT

    SSA-613116: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.1

  • RHSA-2024:2093 Red Hat Product Security63 products fixed

    Red Hat Security Advisory: security update Logging for Red Hat OpenShift - 5.7.13

  • RHSA-2024:2394 Red Hat Product Security279 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

  • RHSA-2024:1836 Red Hat Product Security166 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

13 more advisories

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2024:2093 · 63 productsFor OpenShift Container Platform 4.11 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update: https://docs.openshift.com/container-platform/4.12/release_notes/ocp-4-12-release-not…
  2. Vendor fix Red Hat Product Security RHSA-2024:2394 · 279 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.
  3. Vendor fix Siemens ProductCERT SSA-265688 · 1 productUpdate to V1.1.1 or later version
  4. Vendor fix Siemens ProductCERT SSA-398330 · 1 productUpdate to V3.1.5 or later version
  5. Vendor fix CISA ICSA-23-348-10 · 5 productsUpdate to V3.1.5 or later version
  6. Vendor fix CISA ICSA-23-166-11 · 1 productUpdate to V1.1 or later version

Advisories and patches

Detection

read 2026-11-09 09:29 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.17.8known since 2026-10-23
  • NVDCVSS 3.17read 2026-10-23
  • CNAweakness (CWE)CWE-787known since 2026-10-23
  • NVDweakness (CWE)CWE-787read 2026-10-23
  • FIRST EPSSEPSS score0.7 %2026-11-08
  • PoC-in-GitHubproof of concept3known since 2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2023-12-19
Last Modified
2026-10-14
NVD status
Modified
GitHub Advisory
GHSA-xv88-q3gm-mmjp

Frequently asked questions

What is CVE-2023-6931?

A heap out-of-bounds write vulnerability in the Linux kernel's Performance Events system component can be exploited to achieve local privilege escalation. A perf_event's read_size can overflow, leading to an heap out-of-bounds increment or write in perf_read_group(). We recommend upgrading past commit 382c27f4ed28f803b1f1473ac2d8db0afc795a1b.

Is CVE-2023-6931 actively exploited?

Active exploitation of CVE-2023-6931 has not been confirmed. Its EPSS score was 0.7% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-6931?

CVE-2023-6931 has a CVSS v3 base score of 7 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

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