CVE-2024-56665

Medium

In the Linux kernel, the following vulnerability has been resolved: bpf,perf: Fix invalid prog_array access in perf_event_detach_bpf_prog Syzbot reported [1] crash that happens for following tracing scenario: - create tracepoint perf event with attr.inherit=1, attach it to the process and set bpf program to it - attached process forks -> chid creates inherited event the new child event shares the parent's bpf program and tp_event (hence prog_array) which is global for tracepoint - exit both process and its child -> release both events - first perf_event_detach_bpf_prog call will release tp_event->prog_array and second perf_event_detach_bpf_prog will crash, because tp_event->prog_array is NULL The fix makes sure the perf_event_detach_bpf_prog checks prog_array is valid before it tries to remove the bpf program from it. [1] https://lore.kernel.org/bpf/Z1MR6dCIKajNS6nU@krava/T/#m91dbf0688221ec7a7fc95e896a7ef9ff93b0b8ad

Package Linux Kernel
Published 2024-12-27
Last modified 2025-11-03
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 6.1.115, 6.6.59, 5.15.170, 6.11.6, 6.12 and later are affected. Fixed in 6.1.121, 6.6.67, 6.12.6, 6.13 and their respective stable series.

Affected from
≥ 6.1.115 ≥ 6.6.59 ≥ 5.15.170 ≥ 6.11.6 ≥ 6.12
Fixed in
✓ 6.1.121 6.1.x ✓ 6.6.67 6.6.x ✓ 6.12.6 6.12.x ✓ 6.13

References

The following references provide additional information about CVE-2024-56665 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

4 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2024-56665?

    CVE-2024-56665 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.1.115 onward and has been patched in 6.1.121, 6.6.67, 6.12.6 and others. CVE-2024-56665 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2024-56665?

    CVE-2024-56665 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2024-56665?

    Yes — CVE-2024-56665 has been patched. Fixed versions include 6.1.121, 6.6.67, 6.12.6 and others. If you are running Linux kernel 6.1.115 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2024-56665 actively exploited?

    No — CVE-2024-56665 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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