{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31518","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.108Z","datePublished":"2026-04-22T13:54:34.191Z","dateUpdated":"2026-05-11T22:10:20.804Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:10:20.804Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nesp: fix skb leak with espintcp and async crypto\n\nWhen the TX queue for espintcp is full, esp_output_tail_tcp will\nreturn an error and not free the skb, because with synchronous crypto,\nthe common xfrm output code will drop the packet for us.\n\nWith async crypto (esp_output_done), we need to drop the skb when\nesp_output_tail_tcp returns an error."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/esp4.c","net/ipv6/esp6.c"],"versions":[{"version":"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593","lessThan":"aca3ad0c262f54a5b5c95dda80a48365997d1224","status":"affected","versionType":"git"},{"version":"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593","lessThan":"41aafca57de4a4c026701622bd4648f112a9edcd","status":"affected","versionType":"git"},{"version":"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593","lessThan":"4820847e036ff1035b01b69ad68dfc17e7028fe9","status":"affected","versionType":"git"},{"version":"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593","lessThan":"6a3ec6efbc4f90e0ccb2e71574f07351f19996f4","status":"affected","versionType":"git"},{"version":"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593","lessThan":"df6f995358dc1f3c42484f5cfe241d7bd3e1cd15","status":"affected","versionType":"git"},{"version":"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593","lessThan":"88d386243ed374ac969dabd3bbc1409a31d81818","status":"affected","versionType":"git"},{"version":"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593","lessThan":"6aa9841d917532d0f2d932d1ff2f3a94305aaf47","status":"affected","versionType":"git"},{"version":"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593","lessThan":"0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2","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/esp4.c","net/ipv6/esp6.c"],"versions":[{"version":"5.6","status":"affected"},{"version":"0","lessThan":"5.6","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":"6.1.168","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.131","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.80","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.21","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.11","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":"5.6","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.6.131"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.12.80"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.18.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.19.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/aca3ad0c262f54a5b5c95dda80a48365997d1224"},{"url":"https://git.kernel.org/stable/c/41aafca57de4a4c026701622bd4648f112a9edcd"},{"url":"https://git.kernel.org/stable/c/4820847e036ff1035b01b69ad68dfc17e7028fe9"},{"url":"https://git.kernel.org/stable/c/6a3ec6efbc4f90e0ccb2e71574f07351f19996f4"},{"url":"https://git.kernel.org/stable/c/df6f995358dc1f3c42484f5cfe241d7bd3e1cd15"},{"url":"https://git.kernel.org/stable/c/88d386243ed374ac969dabd3bbc1409a31d81818"},{"url":"https://git.kernel.org/stable/c/6aa9841d917532d0f2d932d1ff2f3a94305aaf47"},{"url":"https://git.kernel.org/stable/c/0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2"}],"title":"esp: fix skb leak with espintcp and async crypto","x_generator":{"engine":"bippy-1.2.0"}}}}