CVE-2024-35908: tls: get psock ref after taking rxlock to avoid leak

Description

In the Linux kernel, the following vulnerability has been resolved:

tls: get psock ref after taking rxlock to avoid leak

At the start of tls_sw_recvmsg, we take a reference on the psock, and
then call tls_rx_reader_lock. If that fails, we return directly
without releasing the reference.

Instead of adding a new label, just take the reference after locking
has succeeded, since we don't need it before.

Classification

CVE ID: CVE-2024-35908

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 17.83% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/30fabe50a7ace3e9d57cf7f9288f33ea408491c8
https://git.kernel.org/stable/c/f1b7f14130d782433bc98c1e1e41ce6b4d4c3096
https://git.kernel.org/stable/c/b565d294e3d5aa809566a4d819835da11997d8b3
https://git.kernel.org/stable/c/417e91e856099e9b8a42a2520e2255e6afe024be

Timeline