Vulnerability Details : CVE-2024-26686
In the Linux kernel, the following vulnerability has been resolved:
fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats
lock_task_sighand() can trigger a hard lockup. If NR_CPUS threads call
do_task_stat() at the same time and the process has NR_THREADS, it will
spin with irqs disabled O(NR_CPUS * NR_THREADS) time.
Change do_task_stat() to use sig->stats_lock to gather the statistics
outside of ->siglock protected section, in the likely case this code will
run lockless.
Products affected by CVE-2024-26686
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2024-26686
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 15 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2024-26686
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST | 2025-03-17 |
CWE ids for CVE-2024-26686
-
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.Assigned by: nvd@nist.gov (Primary)
References for CVE-2024-26686
-
https://git.kernel.org/stable/c/4fe85bdaabd63f8f8579b24a10ed597c9c482164
-
https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305
fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/0c35d1914353799c54fa1843fe7dea6fcbcdbac5
-
https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071
fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4d
fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/3820b0fac7732a653bcc6f6ac20c1d72e697f8f6
fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats - kernel/git/stable/linux.git - Linux kernel stable treePatch
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