Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 before 3fe624c3843694ab096fdb198526ba0c659febbe; affected 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 before 43410c1f2db53516e95ddd7e5b4b02f495b78121; affected 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 before d893a7cc1cb41dd510f338bb2bfd8f29b14eaf49; affected 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 before 83b1a7f9e718828ef364a7b004254ebb2d0035fe; affected 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 before 173610fff55022a5ad1579fbcc7faa97467b58b7; affected 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 before c9338057df1025f578fe7d0ff08bada87b8b838d; affected 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 before ddc34cc0834c873871e88b055ee6a260676efe97; affected 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 before d2c31b837406395e576afeb25958c98e9938f3f6; affected 8ceaec02b17397d12719a282945abc95f8149d9f; affected d2c2bdcdd8c5ce3d2a68aa3353ed1f340c3e500e; affected 3.10.106 before 3.11; affected 3.12.71 before 3.13 |
| Linux / Linux | affected 3.14; unaffected 0 before 3.14; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.55 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/3fe624c3843694ab096fdb198526ba0c659febbe
- https://git.kernel.org/stable/c/43410c1f2db53516e95ddd7e5b4b02f495b78121
- https://git.kernel.org/stable/c/d893a7cc1cb41dd510f338bb2bfd8f29b14eaf49
- https://git.kernel.org/stable/c/83b1a7f9e718828ef364a7b004254ebb2d0035fe
- https://git.kernel.org/stable/c/173610fff55022a5ad1579fbcc7faa97467b58b7
- https://git.kernel.org/stable/c/c9338057df1025f578fe7d0ff08bada87b8b838d
- https://git.kernel.org/stable/c/ddc34cc0834c873871e88b055ee6a260676efe97
- https://git.kernel.org/stable/c/d2c31b837406395e576afeb25958c98e9938f3f6