{"api_version":"1","generated_at":"2026-04-25T13:02:33+00:00","cve":"CVE-2026-31683","urls":{"html":"https://cve.report/CVE-2026-31683","api":"https://cve.report/api/cve/CVE-2026-31683.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31683","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31683"},"summary":{"title":"batman-adv: avoid OGM aggregation when skb tailroom is insufficient","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-25 09:16:02","updated_at":"2026-04-25 09:16:02"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075","name":"https://git.kernel.org/stable/c/6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1ada20331f2df2a942d6b83ae1f04a304b642e2a","name":"https://git.kernel.org/stable/c/1ada20331f2df2a942d6b83ae1f04a304b642e2a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1","name":"https://git.kernel.org/stable/c/0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8","name":"https://git.kernel.org/stable/c/0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0d4aef630be9d5f9c1227d07669c26c4383b5ad0","name":"https://git.kernel.org/stable/c/0d4aef630be9d5f9c1227d07669c26c4383b5ad0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/eda89a1bae0602aec8314ced299bb243b9f9aeef","name":"https://git.kernel.org/stable/c/eda89a1bae0602aec8314ced299bb243b9f9aeef","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/67176c96f325837b0bb3e9538ca2eba414f447d8","name":"https://git.kernel.org/stable/c/67176c96f325837b0bb3e9538ca2eba414f447d8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6755347c5f9bdd44dee80f692208b056fcd40a52","name":"https://git.kernel.org/stable/c/6755347c5f9bdd44dee80f692208b056fcd40a52","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31683","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31683","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 67176c96f325837b0bb3e9538ca2eba414f447d8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 6755347c5f9bdd44dee80f692208b056fcd40a52 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 1ada20331f2df2a942d6b83ae1f04a304b642e2a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.167 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.130 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.78 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.20 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.10 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/batman-adv/bat_iv_ogm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"67176c96f325837b0bb3e9538ca2eba414f447d8","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"},{"lessThan":"0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"},{"lessThan":"6755347c5f9bdd44dee80f692208b056fcd40a52","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"},{"lessThan":"1ada20331f2df2a942d6b83ae1f04a304b642e2a","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"},{"lessThan":"6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"},{"lessThan":"0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"},{"lessThan":"eda89a1bae0602aec8314ced299bb243b9f9aeef","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"},{"lessThan":"0d4aef630be9d5f9c1227d07669c26c4383b5ad0","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/batman-adv/bat_iv_ogm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.38"},{"lessThan":"2.6.38","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.167","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.20","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.253","versionStartIncluding":"2.6.38","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"2.6.38","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.167","versionStartIncluding":"2.6.38","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.130","versionStartIncluding":"2.6.38","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.78","versionStartIncluding":"2.6.38","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.20","versionStartIncluding":"2.6.38","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.10","versionStartIncluding":"2.6.38","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"2.6.38","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-04-25T08:47:00.334Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31683","datePublished":"2026-04-25T08:47:00.334Z","dateReserved":"2026-03-09T15:48:24.130Z","dateUpdated":"2026-04-25T08:47:00.334Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-25 09:16:02","lastModifiedDate":"2026-04-25 09:16:02","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31683","Ordinal":"1","Title":"batman-adv: avoid OGM aggregation when skb tailroom is insuffici","CVE":"CVE-2026-31683","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31683","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"batman-adv: avoid OGM aggregation when skb tailroom is insuffici"}]}}}