FKIE_CVE-2026-64304

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-07-27 05:16
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1002719d13072a5e4be1e993aa61dffb4a604e82
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d61a214fdcda41f1ebfabbb483404032a7b4d91
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/500319830d76911c120dc0b9605f8c16d7702844
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6d99c5fadd2df488103f64d6475b63ba6852202b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b3ac78756588059729b9195fcc9f4b37d54057a5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/crypto/intel/qat/qat_common/qat_asym_algs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6d99c5fadd2df488103f64d6475b63ba6852202b",
              "status": "affected",
              "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
              "versionType": "git"
            },
            {
              "lessThan": "c34369473bfe92a0b46ec78d6358e30341c7f481",
              "status": "affected",
              "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
              "versionType": "git"
            },
            {
              "lessThan": "1002719d13072a5e4be1e993aa61dffb4a604e82",
              "status": "affected",
              "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
              "versionType": "git"
            },
            {
              "lessThan": "500319830d76911c120dc0b9605f8c16d7702844",
              "status": "affected",
              "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
              "versionType": "git"
            },
            {
              "lessThan": "3d61a214fdcda41f1ebfabbb483404032a7b4d91",
              "status": "affected",
              "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
              "versionType": "git"
            },
            {
              "lessThan": "6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a",
              "status": "affected",
              "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
              "versionType": "git"
            },
            {
              "lessThan": "ce42224487c504aee4b7ff3a7342e7b4d7e28cc9",
              "status": "affected",
              "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
              "versionType": "git"
            },
            {
              "lessThan": "b3ac78756588059729b9195fcc9f4b37d54057a5",
              "status": "affected",
              "version": "879f77e9071f029e1c9bd5a75814ecf51370f846",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/crypto/intel/qat/qat_common/qat_asym_algs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qat - validate RSA CRT component lengths\n\nThe generic RSA key parser (rsa_helper.c) bounds each CRT component (p,\nq, dp, dq, qinv) by the modulus size n_sz, but qat_rsa_setkey_crt()\nallocates half-size DMA buffers (key_sz / 2) and right-aligns each\ncomponent with:\n\n    memcpy(dst + half_key_sz - len, src, len)\n\nWhen a CRT component is larger than half_key_sz the subtraction\nunderflows and memcpy writes past the DMA buffer, causing memory\ncorruption.\n\nAdd a len \u003e half_key_sz check next to the existing !len check for each\nof the five CRT components so the driver falls back to the non-CRT path\ninstead of writing out of bounds."
    }
  ],
  "id": "CVE-2026-64304",
  "lastModified": "2026-07-27T05:16:40.950",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-07-25T10:17:11.403",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1002719d13072a5e4be1e993aa61dffb4a604e82"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3d61a214fdcda41f1ebfabbb483404032a7b4d91"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/500319830d76911c120dc0b9605f8c16d7702844"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6d99c5fadd2df488103f64d6475b63ba6852202b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b3ac78756588059729b9195fcc9f4b37d54057a5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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