{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: 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Linux","vendor":"Linux","versions":[{"status":"affected","version":"5.6"},{"lessThan":"5.6","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":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.131","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.80","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]}],"cveId":"CVE-2026-31518","cwes":[],"description":"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.","epss":{"date":"2026-11-05","percentile":0.02539,"score":0.00129},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793915104809,"publishedAt":1776866074191,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/aca3ad0c262f54a5b5c95dda80a48365997d1224"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/41aafca57de4a4c026701622bd4648f112a9edcd"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/4820847e036ff1035b01b69ad68dfc17e7028fe9"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/6a3ec6efbc4f90e0ccb2e71574f07351f19996f4"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/df6f995358dc1f3c42484f5cfe241d7bd3e1cd15"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/88d386243ed374ac969dabd3bbc1409a31d81818"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/6aa9841d917532d0f2d932d1ff2f3a94305aaf47"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-082556.html"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}],"remediation":[],"revision":"fee989093d06c3db6617d842cdd389b38dcacc82243e14acddc39eaee30f4a4d","sources":[{"modifiedAt":1793915104809,"name":"CNA: Linux","retrievedAt":1793917077142,"url":"https://www.cve.org/CVERecord?id=CVE-2026-31518"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793917103598,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-31518"}],"ssvc":{"assessedAt":1793914598445,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"esp: fix skb leak with espintcp and async crypto","updatedAt":1793917103598}