FKIE_CVE-2026-98831

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-30 13:21
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: of/overlay: don't leak fragment references when changeset init fails init_overlay_changeset() stores the number of initialized fragments in ovcs->count only on full success. When find_target() or the __symbols__ lookup fails partway through, the target and overlay references taken for the fragments initialized so far are never dropped: free_overlay_changeset() bounds its cleanup loop by ovcs->count, which is still 0. Store the running count on the error path so free_overlay_changeset() puts whatever was set up. The store is guarded by ovcs->fragments because on the allocation-failure path cnt still holds the counting pass total while there is no fragments array; everywhere else cnt only counts fully-initialized fragments.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d62f0f2bc7edb12ed09f71203df0e47fa4efca4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3a23fb158ba517b77a2e5258263bdfdaa480f758
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64517aeaa3d8b158e4d01321a095be48cb551251
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/702b5db6e7b3865be70675d57d6fd7dde80d02b6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7a46f1917b320cc8762183b802301da02a191b6a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/894573e2fdaeb1b15030b7eebc22615edf28a6cd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bbe3dc64b28a14bd9ecb514bbf5115ac8472ed80
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c654f283d7db20648a5bbf979209f78d4fa9be3f
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/of/overlay.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c654f283d7db20648a5bbf979209f78d4fa9be3f",
              "status": "affected",
              "version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
              "versionType": "git"
            },
            {
              "lessThan": "64517aeaa3d8b158e4d01321a095be48cb551251",
              "status": "affected",
              "version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
              "versionType": "git"
            },
            {
              "lessThan": "bbe3dc64b28a14bd9ecb514bbf5115ac8472ed80",
              "status": "affected",
              "version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
              "versionType": "git"
            },
            {
              "lessThan": "702b5db6e7b3865be70675d57d6fd7dde80d02b6",
              "status": "affected",
              "version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
              "versionType": "git"
            },
            {
              "lessThan": "894573e2fdaeb1b15030b7eebc22615edf28a6cd",
              "status": "affected",
              "version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
              "versionType": "git"
            },
            {
              "lessThan": "7a46f1917b320cc8762183b802301da02a191b6a",
              "status": "affected",
              "version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
              "versionType": "git"
            },
            {
              "lessThan": "3a23fb158ba517b77a2e5258263bdfdaa480f758",
              "status": "affected",
              "version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
              "versionType": "git"
            },
            {
              "lessThan": "1d62f0f2bc7edb12ed09f71203df0e47fa4efca4",
              "status": "affected",
              "version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/of/overlay.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "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\nof/overlay: don\u0027t leak fragment references when changeset init fails\n\ninit_overlay_changeset() stores the number of initialized fragments\nin ovcs-\u003ecount only on full success. When find_target() or the\n__symbols__ lookup fails partway through, the target and overlay\nreferences taken for the fragments initialized so far are never\ndropped: free_overlay_changeset() bounds its cleanup loop by\novcs-\u003ecount, which is still 0.\n\nStore the running count on the error path so free_overlay_changeset()\nputs whatever was set up. The store is guarded by ovcs-\u003efragments\nbecause on the allocation-failure path cnt still holds the counting\npass total while there is no fragments array; everywhere else cnt\nonly counts fully-initialized fragments."
    }
  ],
  "id": "CVE-2026-98831",
  "lastModified": "2026-10-30T13:21:29.530",
  "metrics": {},
  "published": "2026-10-18T16:17:37.347",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1d62f0f2bc7edb12ed09f71203df0e47fa4efca4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3a23fb158ba517b77a2e5258263bdfdaa480f758"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/64517aeaa3d8b158e4d01321a095be48cb551251"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/702b5db6e7b3865be70675d57d6fd7dde80d02b6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7a46f1917b320cc8762183b802301da02a191b6a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/894573e2fdaeb1b15030b7eebc22615edf28a6cd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bbe3dc64b28a14bd9ecb514bbf5115ac8472ed80"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c654f283d7db20648a5bbf979209f78d4fa9be3f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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