CVE-2025-38112
net: Fix TOCTOU issue in sk_is_readable()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
4.17
References 7
git.kernel.org
- stable/c/c2b26638476baee154920bb587fc94ff1bf04336
- stable/c/6fa68d7eab34d448a61aa24ea31e68b3231ed20d
- stable/c/8926a7ef1977a832dd6bf702f1a99303dbf15b15
- stable/c/ff55c85a923e043d59d26b20a673a1b4a219c310
- stable/c/1e0de7582ceccbdbb227d4e0ddf65732f92526da
- stable/c/1b367ba2f94251822577daed031d6b9a9e11ba91
- stable/c/2660a544fdc0940bba15f70508a46cf9a6491230