{"id":"CVE-2026-23118","state":"PUBLISHED","title":"rxrpc: Fix data-race warning and potential load/store tearing","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix data-race warning and potential load/store tearing\n\nFix the following:\n\n        BUG: KCSAN: data-race in rxrpc_peer_keepalive_worker / rxrpc_send_data_packet\n\nwhich is reporting an issue with the reads and writes to ->last_tx_at in:\n\n        conn->peer->last_tx_at = ktime_get_seconds();\n\nand:\n\n        keepalive_at = peer->last_tx_at + RXRPC_KEEPALIVE_TIME;\n\nThe lockless accesses to these to values aren't actually a problem as the\nread only needs an approximate time of last transmission for the purposes\nof deciding whether or not the transmission of a keepalive packet is\nwarranted yet.\n\nAlso, as ->last_tx_at is a 64-bit value, tearing can occur on a 32-bit\narch.\n\nFix both of these by switching to an unsigned int for ->last_tx_at and only\nstoring the LSW of the time64_t.  It can then be reconstructed at need\nprovided no more than 68 years has elapsed since the last transmission.","publishedAt":"2026-02-14T15:09:49.845Z","updatedAt":"2026-10-30T12:23:43.092Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ace45bec6d77bc061c3c3d8ad99e298ea9800c2b","status":"affected","lessThan":"49b8ef1abfe7713e15d9128006cb76e413b12b57","versionType":"git"},{"version":"ace45bec6d77bc061c3c3d8ad99e298ea9800c2b","status":"affected","lessThan":"a426f29ac3fa3465093567ab763ada46762fb57c","versionType":"git"},{"version":"ace45bec6d77bc061c3c3d8ad99e298ea9800c2b","status":"affected","lessThan":"c08cf314191cd0f8699089715efb9eff030f0086","versionType":"git"},{"version":"ace45bec6d77bc061c3c3d8ad99e298ea9800c2b","status":"affected","lessThan":"f8cf1368e0a5491b27189a695c36f64e48f3d19d","versionType":"git"},{"version":"ace45bec6d77bc061c3c3d8ad99e298ea9800c2b","status":"affected","lessThan":"5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/rxrpc/ar-internal.h","net/rxrpc/conn_event.c","net/rxrpc/output.c","net/rxrpc/peer_event.c","net/rxrpc/proc.c","net/rxrpc/rxgk.c","net/rxrpc/rxkad.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.17","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.130","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.69","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.8","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/rxrpc/ar-internal.h","net/rxrpc/conn_event.c","net/rxrpc/output.c","net/rxrpc/peer_event.c","net/rxrpc/proc.c","net/rxrpc/rxgk.c","net/rxrpc/rxkad.c"]}],"references":["https://git.kernel.org/stable/c/49b8ef1abfe7713e15d9128006cb76e413b12b57","https://git.kernel.org/stable/c/a426f29ac3fa3465093567ab763ada46762fb57c","https://git.kernel.org/stable/c/c08cf314191cd0f8699089715efb9eff030f0086","https://git.kernel.org/stable/c/f8cf1368e0a5491b27189a695c36f64e48f3d19d","https://git.kernel.org/stable/c/5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b"],"weaknesses":[],"ingestedAt":"2026-10-30T12:40:04.423Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23118.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23118","state":"PUBLISHED","datePublished":"2026-02-14T15:09:49.845Z","dateUpdated":"2026-10-30T12:23:43.092Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.969Z"},"containers":{"cna":{"title":"rxrpc: Fix data-race warning and potential load/store tearing","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix data-race warning and potential load/store tearing\n\nFix the following:\n\n        BUG: KCSAN: data-race in rxrpc_peer_keepalive_worker / rxrpc_send_data_packet\n\nwhich is reporting an issue with the reads and writes to ->last_tx_at in:\n\n        conn->peer->last_tx_at = ktime_get_seconds();\n\nand:\n\n        keepalive_at = peer->last_tx_at + RXRPC_KEEPALIVE_TIME;\n\nThe lockless accesses to these to values aren't actually a problem as the\nread only needs an approximate time of last transmission for the purposes\nof deciding whether or not the transmission of a keepalive packet is\nwarranted yet.\n\nAlso, as ->last_tx_at is a 64-bit value, tearing can occur on a 32-bit\narch.\n\nFix both of these by switching to an unsigned int for ->last_tx_at and only\nstoring the LSW of the time64_t.  It can then be reconstructed at need\nprovided no more than 68 years has elapsed since the last transmission."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ace45bec6d77bc061c3c3d8ad99e298ea9800c2b","status":"affected","lessThan":"49b8ef1abfe7713e15d9128006cb76e413b12b57","versionType":"git"},{"version":"ace45bec6d77bc061c3c3d8ad99e298ea9800c2b","status":"affected","lessThan":"a426f29ac3fa3465093567ab763ada46762fb57c","versionType":"git"},{"version":"ace45bec6d77bc061c3c3d8ad99e298ea9800c2b","status":"affected","lessThan":"c08cf314191cd0f8699089715efb9eff030f0086","versionType":"git"},{"version":"ace45bec6d77bc061c3c3d8ad99e298ea9800c2b","status":"affected","lessThan":"f8cf1368e0a5491b27189a695c36f64e48f3d19d","versionType":"git"},{"version":"ace45bec6d77bc061c3c3d8ad99e298ea9800c2b","status":"affected","lessThan":"5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/rxrpc/ar-internal.h","net/rxrpc/conn_event.c","net/rxrpc/output.c","net/rxrpc/peer_event.c","net/rxrpc/proc.c","net/rxrpc/rxgk.c","net/rxrpc/rxkad.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.17","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.130","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.69","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.8","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/rxrpc/ar-internal.h","net/rxrpc/conn_event.c","net/rxrpc/output.c","net/rxrpc/peer_event.c","net/rxrpc/proc.c","net/rxrpc/rxgk.c","net/rxrpc/rxkad.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/49b8ef1abfe7713e15d9128006cb76e413b12b57"},{"url":"https://git.kernel.org/stable/c/a426f29ac3fa3465093567ab763ada46762fb57c"},{"url":"https://git.kernel.org/stable/c/c08cf314191cd0f8699089715efb9eff030f0086"},{"url":"https://git.kernel.org/stable/c/f8cf1368e0a5491b27189a695c36f64e48f3d19d"},{"url":"https://git.kernel.org/stable/c/5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:23:43.092Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.6.130"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.12.69"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.18.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}