{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74705","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-15T05:44:03.927Z","datePublished":"2026-08-22T15:33:04.110Z","dateUpdated":"2026-08-22T15:33:04.110Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-22T15:33:04.110Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nudp: fix potential use-after-free in tunnel segmentation\n\n__skb_udp_tunnel_segment() gets the UDP header before ensuring the\ntunnel header is in the skb head. If the pull reallocates skb->head,\nthe saved UDP header pointer is no longer valid.\n\nGet the UDP header after the pull to avoid a potential use-after-free."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/udp_offload.c"],"versions":[{"version":"dbef491ebe7f3a4fb1b9111878b86a426fd540b7","lessThan":"6a733a38b983d8c2e222f13968209010cf44de87","status":"affected","versionType":"git"},{"version":"dbef491ebe7f3a4fb1b9111878b86a426fd540b7","lessThan":"19d89b13a43640b2da2f277ee462d919d988cb6f","status":"affected","versionType":"git"},{"version":"dbef491ebe7f3a4fb1b9111878b86a426fd540b7","lessThan":"b3df61bb745eb5201eac22679a2839d4ccbf3442","status":"affected","versionType":"git"},{"version":"dbef491ebe7f3a4fb1b9111878b86a426fd540b7","lessThan":"1ae134c012e10384cdac420b5cc6e0615cde0b55","status":"affected","versionType":"git"},{"version":"dbef491ebe7f3a4fb1b9111878b86a426fd540b7","lessThan":"5161e67c561c4f28a5d9335a6e859b02511de92b","status":"affected","versionType":"git"},{"version":"dbef491ebe7f3a4fb1b9111878b86a426fd540b7","lessThan":"64d322c288577793eedd352b96ef75234ed380fe","status":"affected","versionType":"git"},{"version":"dbef491ebe7f3a4fb1b9111878b86a426fd540b7","lessThan":"588d4a6795d99d080f74ef0b5f391ea8c453ae5d","status":"affected","versionType":"git"},{"version":"dbef491ebe7f3a4fb1b9111878b86a426fd540b7","lessThan":"d0f86fb36eb260abd10007b62c9dcc1028e03e61","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/ipv4/udp_offload.c"],"versions":[{"version":"4.6","status":"affected"},{"version":"0","lessThan":"4.6","status":"unaffected","versionType":"semver"},{"version":"5.10.265","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.152","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.104","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.45","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.9","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","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":"4.6","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.6.152"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.12.104"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.18.45"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"7.1.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/6a733a38b983d8c2e222f13968209010cf44de87"},{"url":"https://git.kernel.org/stable/c/19d89b13a43640b2da2f277ee462d919d988cb6f"},{"url":"https://git.kernel.org/stable/c/b3df61bb745eb5201eac22679a2839d4ccbf3442"},{"url":"https://git.kernel.org/stable/c/1ae134c012e10384cdac420b5cc6e0615cde0b55"},{"url":"https://git.kernel.org/stable/c/5161e67c561c4f28a5d9335a6e859b02511de92b"},{"url":"https://git.kernel.org/stable/c/64d322c288577793eedd352b96ef75234ed380fe"},{"url":"https://git.kernel.org/stable/c/588d4a6795d99d080f74ef0b5f391ea8c453ae5d"},{"url":"https://git.kernel.org/stable/c/d0f86fb36eb260abd10007b62c9dcc1028e03e61"}],"title":"udp: fix potential use-after-free in tunnel segmentation","x_generator":{"engine":"bippy-1.2.0"}}}}