CVE-2023-53254 (GCVE-0-2023-53254)
Vulnerability from cvelistv5 – Published: 2025-09-15 14:46 – Updated: 2026-08-05 09:13
VLAI
EPSS
VEX
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
7.8 (High)
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:01 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
246246cbde5e840012f853e27630ebb59f409486 , < 2f588d0345d69a35e451077afed428fd057a5e34
(git)
Affected: 246246cbde5e840012f853e27630ebb59f409486 , < dea49f2993f57d8a2df2cacb0bf649ef49b28879 (git) Affected: 246246cbde5e840012f853e27630ebb59f409486 , < 198102c9103fc78d8478495971947af77edb05c1 (git) |
guessed | |
| 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) |
guessed |
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.18",
"versionStartIncluding": "3.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.2.5",
"versionStartIncluding": "3.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.3",
"versionStartIncluding": "3.19",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncacheinfo: Fix shared_cpu_map to handle shared caches at different levels\n\nThe cacheinfo sets up the shared_cpu_map by checking whether the caches\nwith the same index are shared between CPUs. However, this will trigger\nslab-out-of-bounds access if the CPUs do not have the same cache hierarchy.\nAnother problem is the mismatched shared_cpu_map when the shared cache does\nnot have the same index between CPUs.\n\nCPU0\tI\tD\tL3\nindex\t0\t1\t2\tx\n\t^\t^\t^\t^\nindex\t0\t1\t2\t3\nCPU1\tI\tD\tL2\tL3\n\nThis patch checks each cache is shared with all caches on other CPUs."
}
],
"providerMetadata": {
"dateUpdated": "2026-01-05T10:18:59.952Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/2f588d0345d69a35e451077afed428fd057a5e34"
},
{
"url": "https://git.kernel.org/stable/c/dea49f2993f57d8a2df2cacb0bf649ef49b28879"
},
{
"url": "https://git.kernel.org/stable/c/198102c9103fc78d8478495971947af77edb05c1"
}
],
"title": "cacheinfo: Fix shared_cpu_map to handle shared caches at different levels",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2023-53254",
"datePublished": "2025-09-15T14:46:24.670Z",
"dateReserved": "2025-09-15T14:19:21.849Z",
"dateUpdated": "2026-01-14T18:02:52.518Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- 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.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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