CVE-2026-45884
apparmor: avoid per-cpu hold underflow in aa_get_buffer
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: apparmor: avoid per-cpu hold underflow in aa_get_buffer When aa_get_buffer() pulls from the per-cpu list it unconditionally decrements cache->hold. If hold reaches 0 while count is still non-zero, the unsigned decrement wraps to UINT_MAX. This keeps hold non-zero for a very long time, so aa_put_buffer() never returns buffers to the global list, which can starve other CPUs and force repeated kmalloc(aa_g_path_max) allocations. Guard the decrement so hold never underflows.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 27, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new unknown vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Linux / Linux
ea9bae12d02819556db63348db8bd8441eb316f2 < 202824a1f89a9786c20a3d646a7c88d223abb1b2 ea9bae12d02819556db63348db8bd8441eb316f2 < 80c334acc6d0bee8605a358a33e69b4aea1ffb92 ea9bae12d02819556db63348db8bd8441eb316f2 < 4bcddd0f6b2e52b4c7b520e4d36a115caf5b7169 ea9bae12d02819556db63348db8bd8441eb316f2 < 640cf2f09575c9dc344b3f7be2498d31e3923ead
Linux / Linux
6.7
References
git.kernel.org: https://git.kernel.org/stable/c/202824a1f89a9786c20a3d646a7c88d223abb1b2 git.kernel.org: https://git.kernel.org/stable/c/80c334acc6d0bee8605a358a33e69b4aea1ffb92 git.kernel.org: https://git.kernel.org/stable/c/4bcddd0f6b2e52b4c7b520e4d36a115caf5b7169 git.kernel.org: https://git.kernel.org/stable/c/640cf2f09575c9dc344b3f7be2498d31e3923ead