CVE-2026-64304 (GCVE-0-2026-64304)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:49 – Updated: 2026-08-17 04:53
VLAI
EPSS
VEX
Title
crypto: qat - validate RSA CRT component lengths
Summary
In the Linux kernel, the following vulnerability has been resolved:
crypto: qat - validate RSA CRT component lengths
The generic RSA key parser (rsa_helper.c) bounds each CRT component (p,
q, dp, dq, qinv) by the modulus size n_sz, but qat_rsa_setkey_crt()
allocates half-size DMA buffers (key_sz / 2) and right-aligns each
component with:
memcpy(dst + half_key_sz - len, src, len)
When a CRT component is larger than half_key_sz the subtraction
underflows and memcpy writes past the DMA buffer, causing memory
corruption.
Add a len > half_key_sz check next to the existing !len check for each
of the five CRT components so the driver falls back to the non-CRT path
instead of writing out of bounds.
Severity
7.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
879f77e9071f029e1c9bd5a75814ecf51370f846 , < 6d99c5fadd2df488103f64d6475b63ba6852202b
(git)
Affected: 879f77e9071f029e1c9bd5a75814ecf51370f846 , < c34369473bfe92a0b46ec78d6358e30341c7f481 (git) Affected: 879f77e9071f029e1c9bd5a75814ecf51370f846 , < 1002719d13072a5e4be1e993aa61dffb4a604e82 (git) Affected: 879f77e9071f029e1c9bd5a75814ecf51370f846 , < 500319830d76911c120dc0b9605f8c16d7702844 (git) Affected: 879f77e9071f029e1c9bd5a75814ecf51370f846 , < 3d61a214fdcda41f1ebfabbb483404032a7b4d91 (git) Affected: 879f77e9071f029e1c9bd5a75814ecf51370f846 , < 6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a (git) Affected: 879f77e9071f029e1c9bd5a75814ecf51370f846 , < ce42224487c504aee4b7ff3a7342e7b4d7e28cc9 (git) Affected: 879f77e9071f029e1c9bd5a75814ecf51370f846 , < b3ac78756588059729b9195fcc9f4b37d54057a5 (git) |
guessed | |
| Linux | Linux |
Affected:
4.8
Unaffected: 0 , < 4.8 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
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{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-787"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-09-16T05:32:33+00:00",
"cve": "CVE-2026-64304",
"id": "CVE-2026-64304",
"initial_release_date": "2026-07-25T00:00:00+00:00",
"product_status:fixed": "1658",
"product_status:known_affected": "22",
"product_status:known_not_affected": "90",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: crypto: qat - validate RSA CRT component lengths",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64304.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-18T00:42:01Z",
"cve": "CVE-2026-64304",
"id": "CVE-2026-64304",
"initial_release_date": "2026-07-25T16:46:09Z",
"product_status:first_fixed": "127",
"product_status:known_affected": "671",
"product_status:known_not_affected": "62",
"product_status:recommended": "194",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64304",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64304.json",
"version": "12"
}
}
}
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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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