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CVE-2024-26686

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CVE-2024-26686

Published: Apr 3, 2024

Modified: May 11, 2026

PUBLISHED

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.

VendorProductVersions

Linux

Linux

affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - < 4fe85bdaabd63f8f8579b24a10ed597c9c482164
affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - < 0c35d1914353799c54fa1843fe7dea6fcbcdbac5
affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - < cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4d
affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - < 3820b0fac7732a653bcc6f6ac20c1d72e697f8f6
affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - < 27978243f165b44e342f28f449b91327944ea071

+1 more versions

Linux

Linux

affected
2.6.12
unaffected
0 - < 2.6.12
unaffected
5.10.237 - <= 5.10.*
unaffected
5.15.181 - <= 5.15.*
unaffected
6.1.82 - <= 6.1.*

+3 more versions

References

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