{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40248","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:20:57.181Z","datePublished":"2025-12-04T16:08:11.509Z","dateUpdated":"2026-05-11T21:45:39.557Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:45:39.557Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: Ignore signal/timeout on connect() if already established\n\nDuring connect(), acting on a signal/timeout by disconnecting an already\nestablished socket leads to several issues:\n\n1. connect() invoking vsock_transport_cancel_pkt() ->\n   virtio_transport_purge_skbs() may race with sendmsg() invoking\n   virtio_transport_get_credit(). This results in a permanently elevated\n   `vvs->bytes_unsent`. Which, in turn, confuses the SOCK_LINGER handling.\n\n2. connect() resetting a connected socket's state may race with socket\n   being placed in a sockmap. A disconnected socket remaining in a sockmap\n   breaks sockmap's assumptions. And gives rise to WARNs.\n\n3. connect() transitioning SS_CONNECTED -> SS_UNCONNECTED allows for a\n   transport change/drop after TCP_ESTABLISHED. Which poses a problem for\n   any simultaneous sendmsg() or connect() and may result in a\n   use-after-free/null-ptr-deref.\n\nDo not disconnect socket on signal/timeout. Keep the logic for unconnected\nsockets: they don't linger, can't be placed in a sockmap, are rejected by\nsendmsg().\n\n[1]: https://lore.kernel.org/netdev/e07fd95c-9a38-4eea-9638-133e38c2ec9b@rbox.co/\n[2]: https://lore.kernel.org/netdev/20250317-vsock-trans-signal-race-v4-0-fc8837f3f1d4@rbox.co/\n[3]: https://lore.kernel.org/netdev/60f1b7db-3099-4f6a-875e-af9f6ef194f6@rbox.co/"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/vmw_vsock/af_vsock.c"],"versions":[{"version":"d021c344051af91f42c5ba9fdedc176740cbd238","lessThan":"3f71753935d648082a8279a97d30efe6b85be680","status":"affected","versionType":"git"},{"version":"d021c344051af91f42c5ba9fdedc176740cbd238","lessThan":"da664101fb4a0de5cb70d2bae6a650df954df2af","status":"affected","versionType":"git"},{"version":"d021c344051af91f42c5ba9fdedc176740cbd238","lessThan":"67432915145848658149683101104e32f9fd6559","status":"affected","versionType":"git"},{"version":"d021c344051af91f42c5ba9fdedc176740cbd238","lessThan":"eeca93f06df89be5a36305b7b9dae1ed65550dfc","status":"affected","versionType":"git"},{"version":"d021c344051af91f42c5ba9fdedc176740cbd238","lessThan":"5998da5a8208ae9ad7838ba322bccb2bdcd95e81","status":"affected","versionType":"git"},{"version":"d021c344051af91f42c5ba9fdedc176740cbd238","lessThan":"f1c170cae285e4b8f61be043bb17addc3d0a14b5","status":"affected","versionType":"git"},{"version":"d021c344051af91f42c5ba9fdedc176740cbd238","lessThan":"ab6b19f690d89ae4709fba73a3c4a7911f495b7a","status":"affected","versionType":"git"},{"version":"d021c344051af91f42c5ba9fdedc176740cbd238","lessThan":"002541ef650b742a198e4be363881439bb9d86b4","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/vmw_vsock/af_vsock.c"],"versions":[{"version":"3.9","status":"affected"},{"version":"0","lessThan":"3.9","status":"unaffected","versionType":"semver"},{"version":"5.4.302","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.247","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.197","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.159","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.118","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.60","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.17.10","lessThanOrEqual":"6.17.*","status":"unaffected","versionType":"semver"},{"version":"6.18","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.4.302"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.10.247"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.15.197"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.1.159"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.6.118"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.12.60"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.17.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.18"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3f71753935d648082a8279a97d30efe6b85be680"},{"url":"https://git.kernel.org/stable/c/da664101fb4a0de5cb70d2bae6a650df954df2af"},{"url":"https://git.kernel.org/stable/c/67432915145848658149683101104e32f9fd6559"},{"url":"https://git.kernel.org/stable/c/eeca93f06df89be5a36305b7b9dae1ed65550dfc"},{"url":"https://git.kernel.org/stable/c/5998da5a8208ae9ad7838ba322bccb2bdcd95e81"},{"url":"https://git.kernel.org/stable/c/f1c170cae285e4b8f61be043bb17addc3d0a14b5"},{"url":"https://git.kernel.org/stable/c/ab6b19f690d89ae4709fba73a3c4a7911f495b7a"},{"url":"https://git.kernel.org/stable/c/002541ef650b742a198e4be363881439bb9d86b4"}],"title":"vsock: Ignore signal/timeout on connect() if already established","x_generator":{"engine":"bippy-1.2.0"}}}}