CVE-2022-49563 (GCVE-0-2022-49563)
Vulnerability from cvelistv5 – Published: 2025-02-26 02:23 – Updated: 2026-08-05 08:55
VLAI
EPSS
VEX
Title
crypto: qat - add param check for RSA
Summary
In the Linux kernel, the following vulnerability has been resolved:
crypto: qat - add param check for RSA
Reject requests with a source buffer that is bigger than the size of the
key. This is to prevent a possible integer underflow that might happen
when copying the source scatterlist into a linear buffer.
Severity
7.8 (High)
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:37 UTC
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
a990532023b903b10cf14736241cdd138e4bc92c , < 4d6d2adce08788b7667a6e58002682ea1bbf6a79
(git)
Affected: a990532023b903b10cf14736241cdd138e4bc92c , < f993321e50ba7a8ba4f5b19939e1772a921a1c42 (git) Affected: a990532023b903b10cf14736241cdd138e4bc92c , < 9714061423b8b24b8afb31b8eb4df977c63f19c4 (git) |
guessed | |
| Linux | Linux |
Affected:
4.3
Unaffected: 0 , < 4.3 (semver) Unaffected: 5.15.58 , ≤ 5.15.* (semver) Unaffected: 5.18.15 , ≤ 5.18.* (semver) Unaffected: 5.19 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "AV:L - The vulnerable qat-rsa encrypt/decrypt paths are reached through the local kernel crypto API (KEYCTL_PKEY_ENCRYPT/DECRYPT selecting \"rsa\"/qat-rsa). This is not reachable via network packet processing.\nAC:L - The underflow is deterministic once an RSA request is issued with src_len greater than key_sz; the attacker controls both the length and the contents written out of bounds via scatterwalk_map_and_copy.\nPR:L - Unprivileged local users can create asymmetric keys and invoke KEYCTL_PKEY_* operations; when Intel QAT is present, qat-rsa registers as \"rsa\" at priority 1000 and is preferred over software RSA.\nUI:N - Exploitation requires only local syscalls to load an RSA key and submit an encrypt/decrypt request; no victim interaction is needed.\nS:U - This is standard kernel heap memory corruption within the same privilege boundary, not a VM/IOMMU escape or other cross-authority impact.\nC:H - The integer underflow produces a heap out-of-bounds write of attacker-controlled length and content, which can be leveraged for arbitrary kernel memory read primitives.\nI:H - Attacker-controlled heap overflow in the QAT RSA request path can corrupt adjacent kernel objects and enable arbitrary write or control-flow hijacking.\nA:H - The same heap corruption can reliably cause kernel oops/panic or otherwise deny service even without a full privilege-escalation exploit."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T08:55:47.255Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/4d6d2adce08788b7667a6e58002682ea1bbf6a79"
},
{
"url": "https://git.kernel.org/stable/c/f993321e50ba7a8ba4f5b19939e1772a921a1c42"
},
{
"url": "https://git.kernel.org/stable/c/9714061423b8b24b8afb31b8eb4df977c63f19c4"
}
],
"title": "crypto: qat - add param check for RSA",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-49563",
"datePublished": "2025-02-26T02:23:10.252Z",
"dateReserved": "2025-02-26T02:08:31.591Z",
"dateUpdated": "2026-08-05T08:55:47.255Z",
"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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