CVE-2026-68400

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation Use the descriptor's `ep_mem_offset` to calculate the start of the endpoint memory access array and to comply with the FF-A spec instead of defaulting to `sizeof(struct ffa_mem_region)`. This requires moving `ffa_mem_region_additional_setup()` earlier in the setup flow. Also, add sanity checks to ensure the calculated descriptor offsets do not exceed `max_fragsize`.

Severity

HIGH

CVSS score

7.8 (v3.1)

Vulnerability status

Received

Source identifier

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

Published

2026-08-10 13:20:33.487000

Last modified

2026-10-21 13:19:29.173000

View original CVE JSON

{
  "id": "CVE-2026-68400",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-08-10T13:20:33.487",
  "lastModified": "2026-10-21T13:19:29.173",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation\n\nUse the descriptor's `ep_mem_offset` to calculate the start of the endpoint\nmemory access array and to comply with the FF-A spec instead of defaulting\nto `sizeof(struct ffa_mem_region)`.\nThis requires moving `ffa_mem_region_additional_setup()` earlier in the setup\nflow.\nAlso, add sanity checks to ensure the calculated descriptor offsets do not\nexceed `max_fragsize`."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/firmware/arm_ffa/driver.c",
            "include/linux/arm_ffa.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "113580530ee7dc61e668b641d657920734533b9f",
              "lessThan": "6e902bea625b710f8bf2f40b4ae4b14fa6a33f13",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "113580530ee7dc61e668b641d657920734533b9f",
              "lessThan": "b39b08e6bee812514b449dc874076890e6b871a0",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "113580530ee7dc61e668b641d657920734533b9f",
              "lessThan": "8ef18f0ab3c0ec1eac77289f5a542bd96a8a6d66",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "113580530ee7dc61e668b641d657920734533b9f",
              "lessThan": "b4d961351aa84fdf0148783fb1f3a1391b8a0adb",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/firmware/arm_ffa/driver.c",
            "include/linux/arm_ffa.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.7",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.7",
              "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/6e902bea625b710f8bf2f40b4ae4b14fa6a33f13",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8ef18f0ab3c0ec1eac77289f5a542bd96a8a6d66",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b39b08e6bee812514b449dc874076890e6b871a0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b4d961351aa84fdf0148783fb1f3a1391b8a0adb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}