CVE-2026-68401

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Fix out-of-bound writes in ffa_setup_and_transmit() Sashiko (locally) reports multiple out-of-bound issues in ffa_setup_and_transmit: 1) Writing ep_mem_access->reserved can write out of bounds for FFA versions < 1.2 as ffa_emad_size_get() returns 16 bytes in that case while reserved has an offset of 24. Instead of zeroing fields, memset the struct to zero first based on the FFA version. 2) Make sure there is enough size to write constituents. While at it, convert the only sizeof() in the driver that uses a type instead of variable.

Severity

HIGH

CVSS score

7.8 (v3.1)

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-08-10 13:20:33.600000

Last modified

2026-10-30 13:19:44.377000

View original CVE JSON

{
  "id": "CVE-2026-68401",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-08-10T13:20:33.600",
  "lastModified": "2026-10-30T13:19:44.377",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_ffa: Fix out-of-bound writes in ffa_setup_and_transmit()\n\nSashiko (locally) reports multiple out-of-bound issues in\nffa_setup_and_transmit:\n1) Writing ep_mem_access->reserved can write out of bounds for FFA\n   versions < 1.2 as ffa_emad_size_get() returns 16 bytes in that case\n   while reserved has an offset of 24.\n   Instead of zeroing fields, memset the struct to zero first based on\n   the FFA version.\n\n2) Make sure there is enough size to write constituents.\n\nWhile at it, convert the only sizeof() in the driver that uses a\ntype instead of variable."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/firmware/arm_ffa/driver.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "22157f74458106c5900dbd938eb44623c22d97a0",
              "lessThan": "500f92f398c717aa515afd23c7a38c0e7f4a1dc9",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "111a833dc5cbef3d05b2a796a7e23cb7f6ff2192",
              "lessThan": "d312a71b19bb83803c8d1372bc042bd36db657f7",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "111a833dc5cbef3d05b2a796a7e23cb7f6ff2192",
              "lessThan": "00bef9d0f9e787f56ff4699d3b577983ff8b7f24",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "111a833dc5cbef3d05b2a796a7e23cb7f6ff2192",
              "lessThan": "cf5708c9d78c98214c62b1e5d049cd527a543b8e",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "111a833dc5cbef3d05b2a796a7e23cb7f6ff2192",
              "lessThan": "27abdaf0c5c89b06694e4c3d8318e8d6a60c1d1b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "111a833dc5cbef3d05b2a796a7e23cb7f6ff2192",
              "lessThan": "3383ffb7ef937317361713ffcc21921a7848511a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "28ebfb74fbf513e0c7cd2674d8c2400ee0220d18",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "b77ec23b6df41c48e88735230e11caec56163630",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "6.1.31",
              "lessThan": "6.1.191",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "5.15.114",
              "lessThan": "5.16",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.3.5",
              "lessThan": "6.4",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/firmware/arm_ffa/driver.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.4",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.4",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.114",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.42",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.6",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/00bef9d0f9e787f56ff4699d3b577983ff8b7f24",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/27abdaf0c5c89b06694e4c3d8318e8d6a60c1d1b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3383ffb7ef937317361713ffcc21921a7848511a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/500f92f398c717aa515afd23c7a38c0e7f4a1dc9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cf5708c9d78c98214c62b1e5d049cd527a543b8e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d312a71b19bb83803c8d1372bc042bd36db657f7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}