{"id":"CVE-2026-46102","state":"PUBLISHED","title":"net: strparser: fix skb_head leak in strp_abort_strp()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: strparser: fix skb_head leak in strp_abort_strp()\n\nWhen the stream parser is aborted, for example after a message assembly timeout,\nit can still hold a reference to a partially assembled message in\nstrp->skb_head.\n\nThat skb is not released in strp_abort_strp(), which leaks the partially\nassembled message and can be triggered repeatedly to exhaust memory.\n\nFix this by freeing strp->skb_head and resetting the parser state in the\nabort path. Leave strp_stop() unchanged so final cleanup still happens in\nstrp_done() after the work and timer have been synchronized.","publishedAt":"2026-05-27T12:59:09.526Z","updatedAt":"2026-10-19T19:26:43.592Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"d6668ce0e78d23eabecef9a6bc4f0f739cb28ad3","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"a470ed71c906cc8cbad0d74c9942216698911f8b","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"c2e57695ec9ff9d42f23de70f3805199153d007b","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"e9ae00490d474757c0f9c65073de83e6bb1e5a00","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"5327dad2ffe9c1b49881dd6d51ff3c6893847568","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"19ca9475f18f991735f98a22e735c43e95e6298d","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"56082f442023db9be1a5a29d4ee361de4017c0b7","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"fe72340daaf1af588be88056faf98965f39e6032","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/strparser/strparser.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.9","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.86","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.27","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/strparser/strparser.c"]}],"references":["https://git.kernel.org/stable/c/d6668ce0e78d23eabecef9a6bc4f0f739cb28ad3","https://git.kernel.org/stable/c/a470ed71c906cc8cbad0d74c9942216698911f8b","https://git.kernel.org/stable/c/c2e57695ec9ff9d42f23de70f3805199153d007b","https://git.kernel.org/stable/c/e9ae00490d474757c0f9c65073de83e6bb1e5a00","https://git.kernel.org/stable/c/5327dad2ffe9c1b49881dd6d51ff3c6893847568","https://git.kernel.org/stable/c/19ca9475f18f991735f98a22e735c43e95e6298d","https://git.kernel.org/stable/c/56082f442023db9be1a5a29d4ee361de4017c0b7","https://git.kernel.org/stable/c/fe72340daaf1af588be88056faf98965f39e6032","https://cert-portal.siemens.com/productcert/html/ssa-784472.html"],"weaknesses":["CWE-401"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46102.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46102","state":"PUBLISHED","datePublished":"2026-05-27T12:59:09.526Z","dateUpdated":"2026-10-19T19:26:43.592Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.097Z"},"containers":{"cna":{"title":"net: strparser: fix skb_head leak in strp_abort_strp()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: strparser: fix skb_head leak in strp_abort_strp()\n\nWhen the stream parser is aborted, for example after a message assembly timeout,\nit can still hold a reference to a partially assembled message in\nstrp->skb_head.\n\nThat skb is not released in strp_abort_strp(), which leaks the partially\nassembled message and can be triggered repeatedly to exhaust memory.\n\nFix this by freeing strp->skb_head and resetting the parser state in the\nabort path. Leave strp_stop() unchanged so final cleanup still happens in\nstrp_done() after the work and timer have been synchronized."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"d6668ce0e78d23eabecef9a6bc4f0f739cb28ad3","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"a470ed71c906cc8cbad0d74c9942216698911f8b","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"c2e57695ec9ff9d42f23de70f3805199153d007b","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"e9ae00490d474757c0f9c65073de83e6bb1e5a00","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"5327dad2ffe9c1b49881dd6d51ff3c6893847568","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"19ca9475f18f991735f98a22e735c43e95e6298d","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"56082f442023db9be1a5a29d4ee361de4017c0b7","versionType":"git"},{"version":"43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a","status":"affected","lessThan":"fe72340daaf1af588be88056faf98965f39e6032","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/strparser/strparser.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.9","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.86","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.27","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/strparser/strparser.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d6668ce0e78d23eabecef9a6bc4f0f739cb28ad3"},{"url":"https://git.kernel.org/stable/c/a470ed71c906cc8cbad0d74c9942216698911f8b"},{"url":"https://git.kernel.org/stable/c/c2e57695ec9ff9d42f23de70f3805199153d007b"},{"url":"https://git.kernel.org/stable/c/e9ae00490d474757c0f9c65073de83e6bb1e5a00"},{"url":"https://git.kernel.org/stable/c/5327dad2ffe9c1b49881dd6d51ff3c6893847568"},{"url":"https://git.kernel.org/stable/c/19ca9475f18f991735f98a22e735c43e95e6298d"},{"url":"https://git.kernel.org/stable/c/56082f442023db9be1a5a29d4ee361de4017c0b7"},{"url":"https://git.kernel.org/stable/c/fe72340daaf1af588be88056faf98965f39e6032"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - The strparser parses data received from a remote TCP peer (espintcp ESP-in-TCP framing, sockmap framed protocols); the leak is driven by a remote peer sending a partial length-prefixed frame that never completes.\nAC:L - The attacker reliably sends an incomplete framed message and simply lets the message-assembly timer expire; this trigger is fully under the attacker's control.\nPR:N - The framing parse (length-prefix read) occurs at the stream layer before any authentication of the payload, so a remote peer needs no privileges on the target to send partial frames and trigger the leak.\nUI:N - No victim interaction is required; the leak is triggered solely by the attacker's network data and the timeout firing.\nS:U - The leaked skb is kernel memory within the same security authority; no security boundary is crossed.\nC:N - The leaked partial-message skb is orphaned, not exposed to the attacker; the bug discloses no information.\nI:N - Nothing is overwritten or modified; the parser is stopped and the dangling pointer is never reused, so there is no integrity impact.\nA:H - Each abort leaks a partial message (up to sk_rcvbuf) and the commit notes it can be triggered repeatedly to exhaust memory, leading to kernel-wide memory exhaustion / OOM denial of service."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:29:38.661Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.12.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.18.27"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"7.0.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"*","versionType":"custom"}]}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}],"providerMetadata":{"shortName":"siemens-SADP","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","dateUpdated":"2026-10-15T01:20:31.343Z"},"x_adpType":"supplier"},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-46102","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-16T15:19:37.365331Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-401","lang":"en","type":"CWE","description":"CWE-401 Missing Release of Memory after Effective Lifetime"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T19:26:43.592Z"}}]}}}