CVE-2024-49976

MEDIUM EPSS 7.4%
Published Oct 21, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 21, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: tracing/timerlat: Drop interface_lock in stop_kthread() stop_kthread() is the offline callback for "trace/osnoise:online", since commit 5bfbcd1ee57b ("tracing/timerlat: Add interface_lock around clearing of kthread in stop_kthread()"), the following ABBA deadlock scenario is introduced: T1 | T2 [BP] | T3 [AP] osnoise_hotplug_workfn() | work_for_cpu_fn() | cpuhp_thread_fun() | _cpu_down() | osnoise_cpu_die() mutex_lock(&interface_lock) | | stop_kthread() | cpus_write_lock() | mutex_lock(&interface_lock) cpus_read_lock() | cpuhp_kick_ap() | As the interface_lock here in just for protecting the "kthread" field of the osn_var, use xchg() instead to fix this issue. Also use for_each_online_cpu() back in stop_per_cpu_kthreads() as it can take cpu_read_lock() again.

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
7.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-667

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥6.6.51  –  <6.6.55
linuxlinux_kernel*≥6.10.10  –  <6.10.14
linuxlinux_kernel*≥6.11  –  <6.11.3
linuxlinux_kernel6.12any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/09cb44cc3d3df7ade2cebc939d6257a2fa8afc7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a4a05ceffe8fad68b45de38fe2311bda619e76e2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b484a02c9cedf8703eff8f0756f94618004bd165
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/db8571a9a098086608c11a15856ff585789e67e8
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/09cb44cc3d3df7ade2cebc939d6257a2fa8afc7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a4a05ceffe8fad68b45de38fe2311bda619e76e2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b484a02c9cedf8703eff8f0756f94618004bd165
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/db8571a9a098086608c11a15856ff585789e67e8
    Patch