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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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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-09-09T01:36:36+00:00",
      "cve": "CVE-2026-64304",
      "id": "CVE-2026-64304",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:fixed": "1457",
      "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": "2026-09-13T17:12:12Z",
      "cve": "CVE-2026-64304",
      "id": "CVE-2026-64304",
      "initial_release_date": "2026-07-25T16:46:09Z",
      "product_status:first_fixed": "65",
      "product_status:known_affected": "277",
      "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": "9"
    }
  }
}



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Tags
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.