{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31683","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.130Z","datePublished":"2026-04-25T08:47:00.334Z","dateUpdated":"2026-05-11T22:13:37.273Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:13:37.273Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: avoid OGM aggregation when skb tailroom is insufficient\n\nWhen OGM aggregation state is toggled at runtime, an existing forwarded\npacket may have been allocated with only packet_len bytes, while a later\npacket can still be selected for aggregation. Appending in this case can\nhit skb_put overflow conditions.\n\nReject aggregation when the target skb tailroom cannot accommodate the new\npacket. The caller then falls back to creating a new forward packet\ninstead of appending."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/batman-adv/bat_iv_ogm.c"],"versions":[{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"67176c96f325837b0bb3e9538ca2eba414f447d8","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"6755347c5f9bdd44dee80f692208b056fcd40a52","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"1ada20331f2df2a942d6b83ae1f04a304b642e2a","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"eda89a1bae0602aec8314ced299bb243b9f9aeef","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"0d4aef630be9d5f9c1227d07669c26c4383b5ad0","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/bat_iv_ogm.c"],"versions":[{"version":"2.6.38","status":"affected"},{"version":"0","lessThan":"2.6.38","status":"unaffected","versionType":"semver"},{"version":"5.10.253","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.203","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.167","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.130","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.78","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.20","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.10","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","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":"2.6.38","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.1.167"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.6.130"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.12.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.18.20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.19.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/67176c96f325837b0bb3e9538ca2eba414f447d8"},{"url":"https://git.kernel.org/stable/c/0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1"},{"url":"https://git.kernel.org/stable/c/6755347c5f9bdd44dee80f692208b056fcd40a52"},{"url":"https://git.kernel.org/stable/c/1ada20331f2df2a942d6b83ae1f04a304b642e2a"},{"url":"https://git.kernel.org/stable/c/6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075"},{"url":"https://git.kernel.org/stable/c/0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8"},{"url":"https://git.kernel.org/stable/c/eda89a1bae0602aec8314ced299bb243b9f9aeef"},{"url":"https://git.kernel.org/stable/c/0d4aef630be9d5f9c1227d07669c26c4383b5ad0"}],"title":"batman-adv: avoid OGM aggregation when skb tailroom is insufficient","x_generator":{"engine":"bippy-1.2.0"}}}}