Description
In the Linux kernel, the following vulnerability has been resolved: vsock: remove vsock from connected table when connect is interrupted by a signal vsock_connect() expects that the socket could already be in the TCP_ESTABLISHED state when the connecting task wakes up with a signal pending. If this happens the socket will be in the connected table, and it is not removed when the socket state is reset. In this situation it's common for the process to retry connect(), and if the connection is successful the socket will be added to the connected table a second time, corrupting the list. Prevent this by calling vsock_remove_connected() if a signal is received while waiting for a connection. This is harmless if the socket is not in the connected table, and if it is in the table then removing it will prevent list corruption from a double add. Note for backporting: this patch requires d5afa82c977e ("vsock: correct removal of socket from the list"), which is in all current stable trees except 4.9.y.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d021c344051af91f42c5ba9fdedc176740cbd238 to < 0bb88f3f7e8d506f3efe46d694964117e20efbfcaffectedd021c344051af91f42c5ba9fdedc176740cbd238 to < e3b3939fd137aab6d00d54bee0ee9244b286a608affectedd021c344051af91f42c5ba9fdedc176740cbd238 to < 2910bcb9f67551a45397735e47b6d456eb8cd549affectedd021c344051af91f42c5ba9fdedc176740cbd238 to < 5f326fe2aef411a6575628f92bd861463ea91df7affectedd021c344051af91f42c5ba9fdedc176740cbd238 to < 87cd1bbd6677411e17369cd4b7389ab1e1fdba44affectedd021c344051af91f42c5ba9fdedc176740cbd238 to < 787468ee7a435777521d33399d012fd591ae2f94affectedd021c344051af91f42c5ba9fdedc176740cbd238 to < addd62a8cb6fa90aa322365c62487da61f6baab8affectedd021c344051af91f42c5ba9fdedc176740cbd238 to < b9208492fcaecff8f43915529ae34b3bcb03877caffected
Linux Linux
Default version status: affected
3.9affected0 to < 3.9unaffected4.9.303 to ≤ 4.9.*unaffected4.14.268 to ≤ 4.14.*unaffected4.19.231 to ≤ 4.19.*unaffected5.4.181 to ≤ 5.4.*unaffected5.10.102 to ≤ 5.10.*unaffected5.15.25 to ≤ 5.15.*unaffected5.16.11 to ≤ 5.16.*unaffected5.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/0bb88f3f7e8d506f3efe46d694964117e20efbfc ↗
- https://git.kernel.org/stable/c/e3b3939fd137aab6d00d54bee0ee9244b286a608 ↗
- https://git.kernel.org/stable/c/2910bcb9f67551a45397735e47b6d456eb8cd549 ↗
- https://git.kernel.org/stable/c/5f326fe2aef411a6575628f92bd861463ea91df7 ↗
- https://git.kernel.org/stable/c/87cd1bbd6677411e17369cd4b7389ab1e1fdba44 ↗
- https://git.kernel.org/stable/c/787468ee7a435777521d33399d012fd591ae2f94 ↗
- https://git.kernel.org/stable/c/addd62a8cb6fa90aa322365c62487da61f6baab8 ↗
- https://git.kernel.org/stable/c/b9208492fcaecff8f43915529ae34b3bcb03877c ↗