What’s Vulnerable › Vulnerabilities

CVE-2024-56688: sunrpc: clear XPRT_SOCK_UPD_TIMEOUT when reset transport

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-12-28 · updated 2026-08-04
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: sunrpc: clear XPRT_SOCK_UPD_TIMEOUT when reset transport Since transport->sock has been set to NULL during reset transport, XPRT_SOCK_UPD_TIMEOUT also needs to be cleared. Otherwise, the xs_tcp_set_socket_timeouts() may be triggered in xs_tcp_send_request() to dereference the transport->sock that has been set to NULL.

Affected products

• Linux kernel: from 4.11 before 5.4.287; from 5.5 before 5.10.231; from 5.11 before 5.15.174; from 5.16 before 6.1.120; from 6.2 before 6.6.64; from 6.7 before 6.11.11 — fixed in 5.10.231, 5.15.174, 5.4.287, 6.1.120, 6.11.11, 6.12.2

How to fix

Upgrade to a fixed version: Linux kernel 5.10.231, 5.15.174, 5.4.287, 6.1.120. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3811172e8c98ceebd12fe526ca6cb37a1263c964
• https://git.kernel.org/stable/c/4db9ad82a6c823094da27de4825af693a3475d51
• https://git.kernel.org/stable/c/638a8fa5a7e641f9401346c57e236f02379a0c40
• https://git.kernel.org/stable/c/66d11ca91bf5100ae2e6b5efad97e58d8448843a
• https://git.kernel.org/stable/c/86a1f9fa24804cd7f9d7dd3f24af84fc7f8ec02e
• https://git.kernel.org/stable/c/87a95ee34a48dfad198a2002e4966e1d63d53f2b
• https://git.kernel.org/stable/c/cc91d59d34ff6a6fee1c0b48612081a451e05e9a
• https://git.kernel.org/stable/c/fe6cbf0b2ac3cf4e21824a44eaa336564ed5e960
• https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
• https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Get alerted when CVE-2024-56688 or the next vulnerability affects your stack