Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: vsock: Ignore signal/timeout on connect() if already established During connect(), acting on a signal/timeout by disconnecting an already established socket leads to several issues: 1. connect() invoking vsock_transport_cancel_pkt() -> virtio_transport_purge_skbs() may race with sendmsg() invoking virtio_transport_get_credit(). This results in a permanently elevated `vvs->bytes_unsent`. Which, in turn, confuses the SOCK_LINGER handling. 2. connect() resetting a connected socket's state may race with socket being placed in a sockmap. A disconnected socket remaining in a sockmap breaks sockmap's assumptions. And gives rise to WARNs. 3. connect() transitioning SS_CONNECTED -> SS_UNCONNECTED allows for a transport change/drop after TCP_ESTABLISHED. Which poses a problem for any simultaneous sendmsg() or connect() and may result in a use-after-free/null-ptr-deref. Do not disconnect socket on signal/timeout. Keep the logic for unconnected sockets: they don't linger, can't be placed in a sockmap, are rejected by sendmsg(). [1]: https://lore.kernel.org/netdev/e07fd95c-9a38-4eea-9638-133e38c2ec9b@rbox.co/ [2]: https://lore.kernel.org/netdev/20250317-vsock-trans-signal-race-v4-0-fc8837f3f1d4@rbox.co/ [3]: https://lore.kernel.org/netdev/60f1b7db-3099-4f6a-875e-af9f6ef194f6@rbox.co/
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d021c344051af91f42c5ba9fdedc176740cbd238 before 3f71753935d648082a8279a97d30efe6b85be680; affected d021c344051af91f42c5ba9fdedc176740cbd238 before da664101fb4a0de5cb70d2bae6a650df954df2af; affected d021c344051af91f42c5ba9fdedc176740cbd238 before 67432915145848658149683101104e32f9fd6559; affected d021c344051af91f42c5ba9fdedc176740cbd238 before eeca93f06df89be5a36305b7b9dae1ed65550dfc; affected d021c344051af91f42c5ba9fdedc176740cbd238 before 5998da5a8208ae9ad7838ba322bccb2bdcd95e81; affected d021c344051af91f42c5ba9fdedc176740cbd238 before f1c170cae285e4b8f61be043bb17addc3d0a14b5; affected d021c344051af91f42c5ba9fdedc176740cbd238 before ab6b19f690d89ae4709fba73a3c4a7911f495b7a; affected d021c344051af91f42c5ba9fdedc176740cbd238 before 002541ef650b742a198e4be363881439bb9d86b4 |
| Linux / Linux | affected 3.9; unaffected 0 before 3.9; unaffected 5.4.302 through 5.4.*; unaffected 5.10.247 through 5.10.*; unaffected 5.15.197 through 5.15.*; unaffected 6.1.159 through 6.1.*; unaffected 6.6.118 through 6.6.*; unaffected 6.12.60 through 6.12.*; unaffected 6.17.10 through 6.17.*; unaffected 6.18 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/3f71753935d648082a8279a97d30efe6b85be680
- https://git.kernel.org/stable/c/da664101fb4a0de5cb70d2bae6a650df954df2af
- https://git.kernel.org/stable/c/67432915145848658149683101104e32f9fd6559
- https://git.kernel.org/stable/c/eeca93f06df89be5a36305b7b9dae1ed65550dfc
- https://git.kernel.org/stable/c/5998da5a8208ae9ad7838ba322bccb2bdcd95e81
- https://git.kernel.org/stable/c/f1c170cae285e4b8f61be043bb17addc3d0a14b5
- https://git.kernel.org/stable/c/ab6b19f690d89ae4709fba73a3c4a7911f495b7a
- https://git.kernel.org/stable/c/002541ef650b742a198e4be363881439bb9d86b4
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.