{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "610bfc6bc99bc83680d190ebc69359a05fc7f605"
            },
            {
              "fixed": "e4f3f6b818aa6a678bc54a2d4e0bece2303c6a64"
            },
            {
              "fixed": "37be61825b15534a16ff9cfc9546de155b6df982"
            },
            {
              "fixed": "975563c5de1123dde1ec7946bf5556d20c89d74e"
            },
            {
              "fixed": "f653b040dad1af70fa5cd4fe085e4758925480c9"
            },
            {
              "fixed": "e910dbf509125fe51ad68e4fa74dc8ab0a8e787a"
            },
            {
              "fixed": "3eb8bcb823391bd58997831b3c9c152a4ba8e255"
            },
            {
              "fixed": "fdb2c96efb2baeb3725e9ce3ede8f1e36f5490f0"
            },
            {
              "fixed": "9cd3f16c320bfdadd4509358122368deb56a5741"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.13.0"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.142"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.92"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52914.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: fix fragment reassembly length accounting\n\nbatman-adv keeps a running payload length for queued fragments and uses it\nto validate a fragment chain before reassembly.\n\nThat accounting currently allows the accumulated fragment length to be\ntruncated during updates. As a result, malformed fragment chains can\nbypass the intended validation and drive reassembly with inconsistent\nlength state, leading to a local denial of service.\n\nFix the accounting by storing the accumulated length in a length-typed\nfield and rejecting update overflows before the existing validation logic\nruns.\n\nThe fix was verified against the original reproducer and against valid\nfragment reassembly paths.",
  "id": "CVE-2026-52914",
  "modified": "2026-07-10T03:54:01.896640745Z",
  "published": "2026-06-24T07:14:11.906Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/37be61825b15534a16ff9cfc9546de155b6df982"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3eb8bcb823391bd58997831b3c9c152a4ba8e255"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/975563c5de1123dde1ec7946bf5556d20c89d74e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cd3f16c320bfdadd4509358122368deb56a5741"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4f3f6b818aa6a678bc54a2d4e0bece2303c6a64"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e910dbf509125fe51ad68e4fa74dc8ab0a8e787a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f653b040dad1af70fa5cd4fe085e4758925480c9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fdb2c96efb2baeb3725e9ce3ede8f1e36f5490f0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52914.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52914"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "batman-adv: fix fragment reassembly length accounting"
}