FKIE_CVE-2026-99098

Vulnerability from fkie_nvd - Published: 2026-10-26 15:16 - Updated: 2026-10-26 15:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: dm-integrity: fix buffer overflow in inline mode with large tag size In inline mode, dm_integrity_check and dm_integrity_inline_recheck compute the checksum of each block into an on-stack buffer of HASH_MAX_DIGESTSIZE bytes. integrity_sector_checksum pads its result with zeroes up to the tag size, so if the tag size is larger than HASH_MAX_DIGESTSIZE, the padding runs past the end of the buffer. With CONFIG_STACKPROTECTOR the kernel panics in dm_integrity_check on the first read. Enlarge both buffers to hold MAX_TAG_SIZE bytes, as commit b93b6643e9b5 ("dm integrity: fix a crash with unusually large tag size") did for integrity_metadata. Note that this is not a security bug because the buffer overflow can only be triggered by root.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3c7aad85aeb9e28386672e3a009aa2e61f751b86
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4f0ee735dc68e3e6c4dd9a666d7f7047163c4165
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/764b683a6180fd72c931c13fea98d383506a3475
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f49cd7820cd0a96f20e1aa2708adb002124e38a7
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-integrity.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3c7aad85aeb9e28386672e3a009aa2e61f751b86",
              "status": "affected",
              "version": "fb0987682c629c1d2c476f35f6fde405a5e304a4",
              "versionType": "git"
            },
            {
              "lessThan": "4f0ee735dc68e3e6c4dd9a666d7f7047163c4165",
              "status": "affected",
              "version": "fb0987682c629c1d2c476f35f6fde405a5e304a4",
              "versionType": "git"
            },
            {
              "lessThan": "f49cd7820cd0a96f20e1aa2708adb002124e38a7",
              "status": "affected",
              "version": "fb0987682c629c1d2c476f35f6fde405a5e304a4",
              "versionType": "git"
            },
            {
              "lessThan": "764b683a6180fd72c931c13fea98d383506a3475",
              "status": "affected",
              "version": "fb0987682c629c1d2c476f35f6fde405a5e304a4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-integrity.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.114",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "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\ndm-integrity: fix buffer overflow in inline mode with large tag size\n\nIn inline mode, dm_integrity_check and dm_integrity_inline_recheck\ncompute the checksum of each block into an on-stack buffer of\nHASH_MAX_DIGESTSIZE bytes. integrity_sector_checksum pads its result\nwith zeroes up to the tag size, so if the tag size is larger than\nHASH_MAX_DIGESTSIZE, the padding runs past the end of the buffer. With\nCONFIG_STACKPROTECTOR the kernel panics in dm_integrity_check on the\nfirst read.\n\nEnlarge both buffers to hold MAX_TAG_SIZE bytes, as commit b93b6643e9b5\n(\"dm integrity: fix a crash with unusually large tag size\") did for\nintegrity_metadata.\n\nNote that this is not a security bug because the buffer overflow can only\nbe triggered by root."
    }
  ],
  "id": "CVE-2026-99098",
  "lastModified": "2026-10-26T15:16:48.870",
  "metrics": {},
  "published": "2026-10-26T15:16:48.870",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3c7aad85aeb9e28386672e3a009aa2e61f751b86"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4f0ee735dc68e3e6c4dd9a666d7f7047163c4165"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/764b683a6180fd72c931c13fea98d383506a3475"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f49cd7820cd0a96f20e1aa2708adb002124e38a7"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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