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CVE-2026-31642

rxrpc: Fix call removal to use RCU safe deletion

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.135, 6.12.82, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix call removal to use RCU safe deletion Fix rxrpc call removal from the rxnet->calls list to use list_del_rcu() rather than list_del_init() to prevent stuffing up reading /proc/net/rxrpc/calls from potentially getting into an infinite loop. This, however, means that list_empty() no longer works on an entry that's been deleted from the list, making it harder to detect prior deletion. Fix this by: Firstly, make rxrpc_destroy_all_calls() only dump the first ten calls that are unexpectedly still on the list. Limiting the number of steps means there's no need to call cond_resched() or to remove calls from the list here, thereby eliminating the need for rxrpc_put_call() to check for that. rxrpc_put_call() can then be fixed to unconditionally delete the call from the list as it is the only place that the deletion occurs.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 2baec2c3f854d1f79c7bb28386484e144e864a14 · fixed in 3e47a38e584b905359fe0ce5be5165d1e8592a90; From 2baec2c3f854d1f79c7bb28386484e144e864a14 · fixed in b15b1ce96777b88989a6a4de8d01efbcd81ad2d7; From 2baec2c3f854d1f79c7bb28386484e144e864a14 · fixed in 280efb85e9759881a9d31d0874baa04583cb6c09; From 2baec2c3f854d1f79c7bb28386484e144e864a14 · fixed in 93fc15be44a35b8e3c58d0238ac0d9b7c53465ff; From 2baec2c3f854d1f79c7bb28386484e144e864a14 · fixed in c63abf25203b50243fe228090526f9dbf37727bd; From 2baec2c3f854d1f79c7bb28386484e144e864a14 · fixed in 3be718f659683ad89fad6f1eb66bee99727cae64; From 2baec2c3f854d1f79c7bb28386484e144e864a14 · fixed in ac5f54691be06a32246179d41be2d73598036deb; From 2baec2c3f854d1f79c7bb28386484e144e864a14 · fixed in 146d4ab94cf129ee06cd467cb5c71368a6b5bad6

  • Linux Linux

    4.13

  • KernelLinux

    From 4.13.0 · fixed in 5.10.258; From 5.11.0 · fixed in 5.15.209; From 5.16.0 · fixed in 6.1.175; From 6.2.0 · fixed in 6.6.135; From 6.7.0 · fixed in 6.12.82; From 6.13.0 · fixed in 6.18.23; From 6.19.0 · fixed in 6.19.13

References 8

git.kernel.org