crypto: qat - validate RSA CRT component lengths

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64304
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:11 UTC
Updated2026-09-03 16:06:57 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001640000 probability, percentile 0.061050000 (date 2026-08-17)

Problem Types: CWE-787

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 879f77e9071f029e1c9bd5a75814ecf51370f846 6d99c5fadd2df488103f64d6475b63ba6852202b git Not specified
CNA Linux Linux affected 879f77e9071f029e1c9bd5a75814ecf51370f846 c34369473bfe92a0b46ec78d6358e30341c7f481 git Not specified
CNA Linux Linux affected 879f77e9071f029e1c9bd5a75814ecf51370f846 1002719d13072a5e4be1e993aa61dffb4a604e82 git Not specified
CNA Linux Linux affected 879f77e9071f029e1c9bd5a75814ecf51370f846 500319830d76911c120dc0b9605f8c16d7702844 git Not specified
CNA Linux Linux affected 879f77e9071f029e1c9bd5a75814ecf51370f846 3d61a214fdcda41f1ebfabbb483404032a7b4d91 git Not specified
CNA Linux Linux affected 879f77e9071f029e1c9bd5a75814ecf51370f846 6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a git Not specified
CNA Linux Linux affected 879f77e9071f029e1c9bd5a75814ecf51370f846 ce42224487c504aee4b7ff3a7342e7b4d7e28cc9 git Not specified
CNA Linux Linux affected 879f77e9071f029e1c9bd5a75814ecf51370f846 b3ac78756588059729b9195fcc9f4b37d54057a5 git Not specified
CNA Linux Linux affected 4.8 Not specified
CNA Linux Linux unaffected 4.8 semver Not specified
CNA Linux Linux unaffected 5.10.261 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.96 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.39 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6d99c5fadd2df488103f64d6475b63ba6852202b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3d61a214fdcda41f1ebfabbb483404032a7b4d91 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/500319830d76911c120dc0b9605f8c16d7702844 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b3ac78756588059729b9195fcc9f4b37d54057a5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1002719d13072a5e4be1e993aa61dffb4a604e82 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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