{"api_version":"1","generated_at":"2026-10-07T11:05:50+00:00","cve":"CVE-2026-80996","urls":{"html":"https://cve.report/CVE-2026-80996","api":"https://cve.report/api/cve/CVE-2026-80996.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80996","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80996"},"summary":{"title":"net: l2tp: do not propagate multicast notification errors","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: l2tp: do not propagate multicast notification errors\n\nThe tunnel create, tunnel modify, session create, and session modify\nnetlink handlers send multicast notifications through helpers that can fail\nwhile allocating or encoding a message, or while multicasting it.\n\nFor tunnel and session create/modify, a notification is sent after the live\noperation has completed. Returning a best-effort notification error as the\ncommand result can therefore report failure for an operation that already\ncommitted and can cause callers to retry and accumulate live objects.\n\nKeep sending notifications for listener visibility, but do not propagate\ntheir best-effort status as the command result. This also keeps the tunnel\nmodify command consistent with the other notification-only paths.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:06","updated_at":"2026-09-11 20:19:06"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9c340473f4822bb31b151c19afd17448eda5acd1","name":"https://git.kernel.org/stable/c/9c340473f4822bb31b151c19afd17448eda5acd1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/af20e269f7459d2ce69887fdf2fad7caf986c865","name":"https://git.kernel.org/stable/c/af20e269f7459d2ce69887fdf2fad7caf986c865","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/50c4038f1670bf9a80c6a58ae83d1602decd8481","name":"https://git.kernel.org/stable/c/50c4038f1670bf9a80c6a58ae83d1602decd8481","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0fe037d5eaad938aa3e9143ee071aa237750b42b","name":"https://git.kernel.org/stable/c/0fe037d5eaad938aa3e9143ee071aa237750b42b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80996","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80996","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b 0fe037d5eaad938aa3e9143ee071aa237750b42b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b 9c340473f4822bb31b151c19afd17448eda5acd1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b 50c4038f1670bf9a80c6a58ae83d1602decd8481 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b af20e269f7459d2ce69887fdf2fad7caf986c865 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80996","cve":"CVE-2026-80996","epss":"0.001680000","percentile":"0.063560000","score_date":"2026-09-14","updated_at":"2026-09-15 00:00:43"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/l2tp/l2tp_netlink.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0fe037d5eaad938aa3e9143ee071aa237750b42b","status":"affected","version":"33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b","versionType":"git"},{"lessThan":"9c340473f4822bb31b151c19afd17448eda5acd1","status":"affected","version":"33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b","versionType":"git"},{"lessThan":"50c4038f1670bf9a80c6a58ae83d1602decd8481","status":"affected","version":"33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b","versionType":"git"},{"lessThan":"af20e269f7459d2ce69887fdf2fad7caf986c865","status":"affected","version":"33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/l2tp/l2tp_netlink.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.0"},{"lessThan":"4.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"4.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"4.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"4.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"4.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: l2tp: do not propagate multicast notification errors\n\nThe tunnel create, tunnel modify, session create, and session modify\nnetlink handlers send multicast notifications through helpers that can fail\nwhile allocating or encoding a message, or while multicasting it.\n\nFor tunnel and session create/modify, a notification is sent after the live\noperation has completed. Returning a best-effort notification error as the\ncommand result can therefore report failure for an operation that already\ncommitted and can cause callers to retry and accumulate live objects.\n\nKeep sending notifications for listener visibility, but do not propagate\ntheir best-effort status as the command result. This also keeps the tunnel\nmodify command consistent with the other notification-only paths."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:42:51.542Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0fe037d5eaad938aa3e9143ee071aa237750b42b"},{"url":"https://git.kernel.org/stable/c/9c340473f4822bb31b151c19afd17448eda5acd1"},{"url":"https://git.kernel.org/stable/c/50c4038f1670bf9a80c6a58ae83d1602decd8481"},{"url":"https://git.kernel.org/stable/c/af20e269f7459d2ce69887fdf2fad7caf986c865"}],"title":"net: l2tp: do not propagate multicast notification errors","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80996","datePublished":"2026-09-11T19:42:51.542Z","dateReserved":"2026-08-26T14:34:25.812Z","dateUpdated":"2026-09-11T19:42:51.542Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:06","lastModifiedDate":"2026-09-11 20:19:06","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80996","Ordinal":"1","Title":"net: l2tp: do not propagate multicast notification errors","CVE":"CVE-2026-80996","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80996","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: l2tp: do not propagate multicast notification errors\n\nThe tunnel create, tunnel modify, session create, and session modify\nnetlink handlers send multicast notifications through helpers that can fail\nwhile allocating or encoding a message, or while multicasting it.\n\nFor tunnel and session create/modify, a notification is sent after the live\noperation has completed. Returning a best-effort notification error as the\ncommand result can therefore report failure for an operation that already\ncommitted and can cause callers to retry and accumulate live objects.\n\nKeep sending notifications for listener visibility, but do not propagate\ntheir best-effort status as the command result. This also keeps the tunnel\nmodify command consistent with the other notification-only paths.","Type":"Description","Title":"net: l2tp: do not propagate multicast notification errors"}]}}}