What’s Vulnerable › Vulnerabilities

CVE-2024-41033: cachestat: do not flush stats in recency check

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-29 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: cachestat: do not flush stats in recency check syzbot detects that cachestat() is flushing stats, which can sleep, in its RCU read section (see [1]). This is done in the workingset_test_recent() step (which checks if the folio's eviction is recent). Move the stat flushing step to before the RCU read section of cachestat, and skip stat flushing during the recency check. [1]: https://lore.kernel.org/cgroups/000000000000f71227061bdf97e0@google.com/

Affected products

• Linux kernel: from 6.8 before 6.9.10; 6.10-rc1, 6.10-rc2, 6.10-rc3, 6.10-rc4, 6.10-rc5, 6.10-rc6 (+1) — fixed in 6.9.10

How to fix

Upgrade to a fixed version: Linux kernel 6.9.10. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1d1ba14e00d290b1ed616ed78c8c49bf897ce390
• https://git.kernel.org/stable/c/5a4d8944d6b1e1aaaa83ea42c116b520b4ed0394
• https://git.kernel.org/stable/c/e2f7c76758be16f1dc32c5a82270d4f6649eedab
• https://git.kernel.org/stable/c/1d1ba14e00d290b1ed616ed78c8c49bf897ce390
• https://git.kernel.org/stable/c/5a4d8944d6b1e1aaaa83ea42c116b520b4ed0394

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