Answer in brief
CVE-2023-53254 records a High severity (CVSS 7.8) vulnerability in cacheinfo: Fix shared_cpu_map to handle shared caches at different levels. 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 7.8. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=246246cbde5e840012f853e27630ebb59f409486 <2f588d0345d69a35e451077afed428fd057a5e34 || >=246246cbde5e840012f853e27630ebb59f409486 <dea49f2993f57d8a2df2cacb0bf649ef49b28879 || >=246246cbde5e840012f853e27630ebb59f409486 <198102c9103fc78d8478495971947af77edb05c1 | 2f588d0345d69a35e451077afed428fd057a5e34, dea49f2993f57d8a2df2cacb0bf649ef49b28879, 198102c9103fc78d8478495971947af77edb05c1 |
| Linux/Linuxgeneric | 3.19 | Not reported |
Published upstream
Sep 15, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels The cacheinfo sets up the shared_cpu_map by checking whether the caches with the same index are shared between CPUs. However, this will trigger slab-out-of-bounds access if the CPUs do not have the same cache hierarchy. Another problem is the mismatched shared_cpu_map when the shared cache does not have the same index between CPUs. CPU0 I D L3 index 0 1 2 x ^ ^ ^ ^ index 0 1 2 3 CPU1 I D L2 L3 This patch checks each cache is shared with all caches on other CPUs.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2023-53254 records a High severity (CVSS 7.8) vulnerability in cacheinfo: Fix shared_cpu_map to handle shared caches at different levels. 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 7.8. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=246246cbde5e840012f853e27630ebb59f409486 <2f588d0345d69a35e451077afed428fd057a5e34 || >=246246cbde5e840012f853e27630ebb59f409486 <dea49f2993f57d8a2df2cacb0bf649ef49b28879 || >=246246cbde5e840012f853e27630ebb59f409486 <198102c9103fc78d8478495971947af77edb05c1 | 2f588d0345d69a35e451077afed428fd057a5e34, dea49f2993f57d8a2df2cacb0bf649ef49b28879, 198102c9103fc78d8478495971947af77edb05c1 |
| Linux/Linuxgeneric | 3.19 | Not reported |
Published upstream
Sep 15, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels The cacheinfo sets up the shared_cpu_map by checking whether the caches with the same index are shared between CPUs. However, this will trigger slab-out-of-bounds access if the CPUs do not have the same cache hierarchy. Another problem is the mismatched shared_cpu_map when the shared cache does not have the same index between CPUs. CPU0 I D L3 index 0 1 2 x ^ ^ ^ ^ index 0 1 2 3 CPU1 I D L2 L3 This patch checks each cache is shared with all caches on other CPUs.
Quoted source text, attributed separately from HOL analysis.