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CVE-2026-98614

sctp: avoid livelock while updating retransmit path

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 3.11, 3.13, 5.10.271, 5.15.222, 6.1.189, and 4 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: sctp: avoid livelock while updating retransmit path sctp_assoc_update_retran_path() can loop forever when every remaining transport, including retran_path, is SCTP_UNCONFIRMED: the state check runs before the wraparound test, so the loop cannot observe that it has completed a full pass. Fix this by considering a transport only when it is not UNCONFIRMED, then checking whether the walk has returned to retran_path. This makes the full-pass termination independent of the transport state while preserving the existing fallback selection semantics. Also restore the NULL guard around the retran_path assignment. In the all-UNCONFIRMED case there is no eligible replacement transport, and installing NULL would leave later retransmit-path users and the debug print with a NULL path.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 · fixed in 3fe624c3843694ab096fdb198526ba0c659febbe; From 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 · fixed in 43410c1f2db53516e95ddd7e5b4b02f495b78121; From 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 · fixed in d893a7cc1cb41dd510f338bb2bfd8f29b14eaf49; From 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 · fixed in 83b1a7f9e718828ef364a7b004254ebb2d0035fe; From 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 · fixed in 173610fff55022a5ad1579fbcc7faa97467b58b7; From 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 · fixed in c9338057df1025f578fe7d0ff08bada87b8b838d; From 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 · fixed in ddc34cc0834c873871e88b055ee6a260676efe97; From 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 · fixed in d2c31b837406395e576afeb25958c98e9938f3f6; From 3.10.106 · fixed in 3.11; From 3.12.71 · fixed in 3.13

  • Linux Linux

    3.14

  • KernelLinux

    From 3.14.0 · fixed in 5.10.271; From 5.11.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.112; From 6.13.0 · fixed in 6.18.55; From 6.19.0 · fixed in 7.2.9

References 8

git.kernel.org