CVE-2025-38112
net: Fix TOCTOU issue in sk_is_readable()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 3, 2025 |
| Last Updated | May 11, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new unknown vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Linux / Linux
8934ce2fd08171e8605f7fada91ee7619fe17ab8 < c2b26638476baee154920bb587fc94ff1bf04336 8934ce2fd08171e8605f7fada91ee7619fe17ab8 < 6fa68d7eab34d448a61aa24ea31e68b3231ed20d 8934ce2fd08171e8605f7fada91ee7619fe17ab8 < 8926a7ef1977a832dd6bf702f1a99303dbf15b15 8934ce2fd08171e8605f7fada91ee7619fe17ab8 < ff55c85a923e043d59d26b20a673a1b4a219c310 8934ce2fd08171e8605f7fada91ee7619fe17ab8 < 1e0de7582ceccbdbb227d4e0ddf65732f92526da 8934ce2fd08171e8605f7fada91ee7619fe17ab8 < 1b367ba2f94251822577daed031d6b9a9e11ba91 8934ce2fd08171e8605f7fada91ee7619fe17ab8 < 2660a544fdc0940bba15f70508a46cf9a6491230
Linux / Linux
4.17
References
git.kernel.org: https://git.kernel.org/stable/c/c2b26638476baee154920bb587fc94ff1bf04336 git.kernel.org: https://git.kernel.org/stable/c/6fa68d7eab34d448a61aa24ea31e68b3231ed20d git.kernel.org: https://git.kernel.org/stable/c/8926a7ef1977a832dd6bf702f1a99303dbf15b15 git.kernel.org: https://git.kernel.org/stable/c/ff55c85a923e043d59d26b20a673a1b4a219c310 git.kernel.org: https://git.kernel.org/stable/c/1e0de7582ceccbdbb227d4e0ddf65732f92526da git.kernel.org: https://git.kernel.org/stable/c/1b367ba2f94251822577daed031d6b9a9e11ba91 git.kernel.org: https://git.kernel.org/stable/c/2660a544fdc0940bba15f70508a46cf9a6491230 lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html