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CVE-2026-64304 (GCVE-0-2026-64304)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:49 – Updated: 2026-08-17 04:53
VLAI
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)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted 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)
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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)
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{
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    "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": "2026-09-15T01:52:22Z",
      "cve": "CVE-2026-64304",
      "id": "CVE-2026-64304",
      "initial_release_date": "2026-07-25T16:46:09Z",
      "product_status:first_fixed": "188",
      "product_status:known_affected": "671",
      "product_status:known_not_affected": "78",
      "product_status:recommended": "129",
      "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": "10"
    }
  }
}



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Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.


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.