CVE-2026-45884
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
apparmor: avoid per-cpu hold underflow in aa_get_buffer
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| ea9bae12d02819556db63348db8bd8441eb316f2 | affected | git | 202824a1f89a9786c20a3d646a7c88d223abb1b2 | Unavailable | None listed |
| ea9bae12d02819556db63348db8bd8441eb316f2 | affected | git | 80c334acc6d0bee8605a358a33e69b4aea1ffb92 | Unavailable | None listed |
| ea9bae12d02819556db63348db8bd8441eb316f2 | affected | git | 4bcddd0f6b2e52b4c7b520e4d36a115caf5b7169 | Unavailable | None listed |
| ea9bae12d02819556db63348db8bd8441eb316f2 | affected | git | 640cf2f09575c9dc344b3f7be2498d31e3923ead | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.7 | Unavailable | None listed |
| 6.12.75 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.14 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.4 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |