{"id":"CVE-2026-46158","state":"PUBLISHED","title":"mptcp: pm: ADD_ADDR rtx: always decrease sk refcount","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: ADD_ADDR rtx: always decrease sk refcount\n\nWhen an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer().\nIt should then be released in all cases at the end.\n\nSome (unlikely) checks were returning directly instead of calling\nsock_put() to decrease the refcount. Jump to a new 'exit' label to call\n__sock_put() (which will become sock_put() in the next commit) to fix\nthis potential leak.\n\nWhile at it, drop the '!msk' check which cannot happen because it is\nnever reset, and explicitly mark the remaining one as \"unlikely\".","publishedAt":"2026-05-28T09:36:13.821Z","updatedAt":"2026-09-14T11:58:23.714Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"f5555a6d7c472849fdf2b426e3d0a85103118793","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"e9ba34301d2e90f63f97c76ad9eb98e5250fe961","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"81d8142148164176385c279c7c1e1d581867423d","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"9426265e157dd77ec237c795901ed4dea6d69b5c","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"b41dd76f3b9735096c21d3e799a2b9fe36498d57","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"acd3d3562315c99f3c0db16f0fcc5f0306638982","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"25e37407442b8766ec2cf52fb4e31b5c3d3aeeae","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"9634cb35af17019baec21ca648516ce376fa10e6","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mptcp/pm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.218","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.185","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.142","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.92","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","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/mptcp/pm.c"]}],"references":["https://git.kernel.org/stable/c/f5555a6d7c472849fdf2b426e3d0a85103118793","https://git.kernel.org/stable/c/e9ba34301d2e90f63f97c76ad9eb98e5250fe961","https://git.kernel.org/stable/c/81d8142148164176385c279c7c1e1d581867423d","https://git.kernel.org/stable/c/9426265e157dd77ec237c795901ed4dea6d69b5c","https://git.kernel.org/stable/c/b41dd76f3b9735096c21d3e799a2b9fe36498d57","https://git.kernel.org/stable/c/acd3d3562315c99f3c0db16f0fcc5f0306638982","https://git.kernel.org/stable/c/25e37407442b8766ec2cf52fb4e31b5c3d3aeeae","https://git.kernel.org/stable/c/9634cb35af17019baec21ca648516ce376fa10e6"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46158.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46158","state":"PUBLISHED","datePublished":"2026-05-28T09:36:13.821Z","dateUpdated":"2026-09-14T11:58:23.714Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.102Z"},"containers":{"cna":{"title":"mptcp: pm: ADD_ADDR rtx: always decrease sk refcount","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: ADD_ADDR rtx: always decrease sk refcount\n\nWhen an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer().\nIt should then be released in all cases at the end.\n\nSome (unlikely) checks were returning directly instead of calling\nsock_put() to decrease the refcount. Jump to a new 'exit' label to call\n__sock_put() (which will become sock_put() in the next commit) to fix\nthis potential leak.\n\nWhile at it, drop the '!msk' check which cannot happen because it is\nnever reset, and explicitly mark the remaining one as \"unlikely\"."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"f5555a6d7c472849fdf2b426e3d0a85103118793","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"e9ba34301d2e90f63f97c76ad9eb98e5250fe961","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"81d8142148164176385c279c7c1e1d581867423d","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"9426265e157dd77ec237c795901ed4dea6d69b5c","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"b41dd76f3b9735096c21d3e799a2b9fe36498d57","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"acd3d3562315c99f3c0db16f0fcc5f0306638982","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"25e37407442b8766ec2cf52fb4e31b5c3d3aeeae","versionType":"git"},{"version":"00cfd77b9063dcdf3628a7087faba60de85a9cc8","status":"affected","lessThan":"9634cb35af17019baec21ca648516ce376fa10e6","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mptcp/pm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.218","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.185","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.142","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.92","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","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/mptcp/pm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/f5555a6d7c472849fdf2b426e3d0a85103118793"},{"url":"https://git.kernel.org/stable/c/e9ba34301d2e90f63f97c76ad9eb98e5250fe961"},{"url":"https://git.kernel.org/stable/c/81d8142148164176385c279c7c1e1d581867423d"},{"url":"https://git.kernel.org/stable/c/9426265e157dd77ec237c795901ed4dea6d69b5c"},{"url":"https://git.kernel.org/stable/c/b41dd76f3b9735096c21d3e799a2b9fe36498d57"},{"url":"https://git.kernel.org/stable/c/acd3d3562315c99f3c0db16f0fcc5f0306638982"},{"url":"https://git.kernel.org/stable/c/25e37407442b8766ec2cf52fb4e31b5c3d3aeeae"},{"url":"https://git.kernel.org/stable/c/9634cb35af17019baec21ca648516ce376fa10e6"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-09-14T11:58:23.714Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.218"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.1.185"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.6.142"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.12.92"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.18.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.0.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}