CVE-2024-56665

MEDIUM EPSS 11.7%
Published Dec 27, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Dec 27, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

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

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
11.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥5.15.170  –  <5.16
linuxlinux_kernel*≥6.1.115  –  <6.1.121
linuxlinux_kernel*≥6.6.59  –  <6.6.67
linuxlinux_kernel*≥6.11.6  –  <6.12.6
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/842e5af282453983586e2eae3c8eaf252de5f22f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/978c4486cca5c7b9253d3ab98a88c8e769cb9bbd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c2b6b47662d5f2dfce92e5ffbdcac8229f321d9d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dfb15ddf3b65e0df2129f9756d1b4fa78055cdb3
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/842e5af282453983586e2eae3c8eaf252de5f22f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/978c4486cca5c7b9253d3ab98a88c8e769cb9bbd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c2b6b47662d5f2dfce92e5ffbdcac8229f321d9d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dfb15ddf3b65e0df2129f9756d1b4fa78055cdb3
    Patch