vulnerability
Red Hat: CVE-2024-26686: kernel: fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | 2024-04-03 | 2024-08-12 | 2025-03-10 |
Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
2024-04-03
Added
2024-08-12
Modified
2025-03-10
Description
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.
Solution(s)
redhat-upgrade-kernelredhat-upgrade-kernel-rt
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