Answer in brief
CVE-2026-45884 records a Medium severity (CVSS 5.5) vulnerability in apparmor: avoid per-cpu hold underflow in aa_get_buffer. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ea9bae12d02819556db63348db8bd8441eb316f2 <202824a1f89a9786c20a3d646a7c88d223abb1b2 || >=ea9bae12d02819556db63348db8bd8441eb316f2 <80c334acc6d0bee8605a358a33e69b4aea1ffb92 || >=ea9bae12d02819556db63348db8bd8441eb316f2 <4bcddd0f6b2e52b4c7b520e4d36a115caf5b7169 || >=ea9bae12d02819556db63348db8bd8441eb316f2 <640cf2f09575c9dc344b3f7be2498d31e3923ead | 202824a1f89a9786c20a3d646a7c88d223abb1b2, 80c334acc6d0bee8605a358a33e69b4aea1ffb92, 4bcddd0f6b2e52b4c7b520e4d36a115caf5b7169, 640cf2f09575c9dc344b3f7be2498d31e3923ead |
| Linux/Linuxgeneric | 6.7 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-45884 records a Medium severity (CVSS 5.5) vulnerability in apparmor: avoid per-cpu hold underflow in aa_get_buffer. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ea9bae12d02819556db63348db8bd8441eb316f2 <202824a1f89a9786c20a3d646a7c88d223abb1b2 || >=ea9bae12d02819556db63348db8bd8441eb316f2 <80c334acc6d0bee8605a358a33e69b4aea1ffb92 || >=ea9bae12d02819556db63348db8bd8441eb316f2 <4bcddd0f6b2e52b4c7b520e4d36a115caf5b7169 || >=ea9bae12d02819556db63348db8bd8441eb316f2 <640cf2f09575c9dc344b3f7be2498d31e3923ead | 202824a1f89a9786c20a3d646a7c88d223abb1b2, 80c334acc6d0bee8605a358a33e69b4aea1ffb92, 4bcddd0f6b2e52b4c7b520e4d36a115caf5b7169, 640cf2f09575c9dc344b3f7be2498d31e3923ead |
| Linux/Linuxgeneric | 6.7 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
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.
Quoted source text, attributed separately from HOL analysis.