{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "61b4de4e0b384f4a22c55c3bada604da49cec4e1"
            },
            {
              "fixed": "894573e2fdaeb1b15030b7eebc22615edf28a6cd"
            },
            {
              "fixed": "7a46f1917b320cc8762183b802301da02a191b6a"
            },
            {
              "fixed": "3a23fb158ba517b77a2e5258263bdfdaa480f758"
            },
            {
              "fixed": "1d62f0f2bc7edb12ed09f71203df0e47fa4efca4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.15.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.56"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98831.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nof/overlay: don't 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",
  "modified": "2026-10-19T02:30:36.957227277Z",
  "published": "2026-10-18T15:49:32.909Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d62f0f2bc7edb12ed09f71203df0e47fa4efca4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a23fb158ba517b77a2e5258263bdfdaa480f758"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a46f1917b320cc8762183b802301da02a191b6a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/894573e2fdaeb1b15030b7eebc22615edf28a6cd"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98831.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98831"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "of/overlay: don't leak fragment references when changeset init fails"
}