Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: Fix TOCTOU issue in sk_is_readable() sk->sk_prot->sock_is_readable is a valid function pointer when sk resides in a sockmap. After the last sk_psock_put() (which usually happens when socket is removed from sockmap), sk->sk_prot gets restored and sk->sk_prot->sock_is_readable becomes NULL. This makes sk_is_readable() racy, if the value of sk->sk_prot is reloaded after the initial check. Which in turn may lead to a null pointer dereference. Ensure the function pointer does not turn NULL after the check.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8934ce2fd08171e8605f7fada91ee7619fe17ab8 before c2b26638476baee154920bb587fc94ff1bf04336; affected 8934ce2fd08171e8605f7fada91ee7619fe17ab8 before 6fa68d7eab34d448a61aa24ea31e68b3231ed20d; affected 8934ce2fd08171e8605f7fada91ee7619fe17ab8 before 8926a7ef1977a832dd6bf702f1a99303dbf15b15; affected 8934ce2fd08171e8605f7fada91ee7619fe17ab8 before ff55c85a923e043d59d26b20a673a1b4a219c310; affected 8934ce2fd08171e8605f7fada91ee7619fe17ab8 before 1e0de7582ceccbdbb227d4e0ddf65732f92526da; affected 8934ce2fd08171e8605f7fada91ee7619fe17ab8 before 1b367ba2f94251822577daed031d6b9a9e11ba91; affected 8934ce2fd08171e8605f7fada91ee7619fe17ab8 before 2660a544fdc0940bba15f70508a46cf9a6491230 |
| Linux / Linux | affected 4.17; unaffected 0 before 4.17; unaffected 5.10.239 through 5.10.*; unaffected 5.15.186 through 5.15.*; unaffected 6.1.142 through 6.1.*; unaffected 6.6.94 through 6.6.*; unaffected 6.12.34 through 6.12.*; unaffected 6.15.3 through 6.15.*; unaffected 6.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c2b26638476baee154920bb587fc94ff1bf04336
- https://git.kernel.org/stable/c/6fa68d7eab34d448a61aa24ea31e68b3231ed20d
- https://git.kernel.org/stable/c/8926a7ef1977a832dd6bf702f1a99303dbf15b15
- https://git.kernel.org/stable/c/ff55c85a923e043d59d26b20a673a1b4a219c310
- https://git.kernel.org/stable/c/1e0de7582ceccbdbb227d4e0ddf65732f92526da
- https://git.kernel.org/stable/c/1b367ba2f94251822577daed031d6b9a9e11ba91
- https://git.kernel.org/stable/c/2660a544fdc0940bba15f70508a46cf9a6491230
ADP enrichment
No English description supplied.