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crypto: qat - validate RSA CRT component lengths

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-64304

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-64304

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
        "lessThan": "6d99c5fadd2df488103f64d6475b63ba6852202b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
        "lessThan": "c34369473bfe92a0b46ec78d6358e30341c7f481",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
        "lessThan": "1002719d13072a5e4be1e993aa61dffb4a604e82",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
        "lessThan": "500319830d76911c120dc0b9605f8c16d7702844",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
        "lessThan": "3d61a214fdcda41f1ebfabbb483404032a7b4d91",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
        "lessThan": "6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
        "lessThan": "ce42224487c504aee4b7ff3a7342e7b4d7e28cc9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
        "lessThan": "b3ac78756588059729b9195fcc9f4b37d54057a5",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/crypto/intel/qat/qat_common/qat_asym_algs.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.8"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.8",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.96",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.39",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/crypto/intel/qat/qat_common/qat_asym_algs.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-64304

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41003 · Revision 1
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Publisher date
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