{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-52914", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.367Z", "datePublished": "2026-06-24T07:14:11.906Z", "dateUpdated": "2026-06-24T07:14:11.906Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-24T07:14:11.906Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/fragmentation.c", "net/batman-adv/types.h"], "versions": [{"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "e4f3f6b818aa6a678bc54a2d4e0bece2303c6a64", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "37be61825b15534a16ff9cfc9546de155b6df982", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "975563c5de1123dde1ec7946bf5556d20c89d74e", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "f653b040dad1af70fa5cd4fe085e4758925480c9", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "e910dbf509125fe51ad68e4fa74dc8ab0a8e787a", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "3eb8bcb823391bd58997831b3c9c152a4ba8e255", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "fdb2c96efb2baeb3725e9ce3ede8f1e36f5490f0", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "9cd3f16c320bfdadd4509358122368deb56a5741", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/fragmentation.c", "net/batman-adv/types.h"], "versions": [{"version": "3.13", "status": "affected"}, {"version": "0", "lessThan": "3.13", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e4f3f6b818aa6a678bc54a2d4e0bece2303c6a64"}, {"url": "https://git.kernel.org/stable/c/37be61825b15534a16ff9cfc9546de155b6df982"}, {"url": "https://git.kernel.org/stable/c/975563c5de1123dde1ec7946bf5556d20c89d74e"}, {"url": "https://git.kernel.org/stable/c/f653b040dad1af70fa5cd4fe085e4758925480c9"}, {"url": "https://git.kernel.org/stable/c/e910dbf509125fe51ad68e4fa74dc8ab0a8e787a"}, {"url": "https://git.kernel.org/stable/c/3eb8bcb823391bd58997831b3c9c152a4ba8e255"}, {"url": "https://git.kernel.org/stable/c/fdb2c96efb2baeb3725e9ce3ede8f1e36f5490f0"}, {"url": "https://git.kernel.org/stable/c/9cd3f16c320bfdadd4509358122368deb56a5741"}], "title": "batman-adv: fix fragment reassembly length accounting", "x_generator": {"engine": "bippy-1.2.0"}}}}

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