CVE-2023-53254 (GCVE-0-2023-53254)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:46 – Updated: 2026-01-14 18:02
VLAI?
Title
cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
Summary
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.
Severity ?
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 246246cbde5e840012f853e27630ebb59f409486 , < 2f588d0345d69a35e451077afed428fd057a5e34 (git)
Affected: 246246cbde5e840012f853e27630ebb59f409486 , < dea49f2993f57d8a2df2cacb0bf649ef49b28879 (git)
Affected: 246246cbde5e840012f853e27630ebb59f409486 , < 198102c9103fc78d8478495971947af77edb05c1 (git)
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    Linux Linux Affected: 3.19
Unaffected: 0 , < 3.19 (semver)
Unaffected: 6.1.18 , ≤ 6.1.* (semver)
Unaffected: 6.2.5 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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