Bug 2394606 (CVE-2025-39761)

Summary: CVE-2025-39761 kernel: wifi: ath12k: Decrement TID on RX peer frag setup error handling
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-09-11 17:01:54 UTC 
In the Linux kernel, the following vulnerability has been resolved:

wifi: ath12k: Decrement TID on RX peer frag setup error handling

Currently, TID is not decremented before peer cleanup, during error
handling path of ath12k_dp_rx_peer_frag_setup(). This could lead to
out-of-bounds access in peer->rx_tid[].

Hence, add a decrement operation for TID, before peer cleanup to
ensures proper cleanup and prevents out-of-bounds access issues when
the RX peer frag setup fails.

Found during code review. Compile tested only.
Comment 1 Jon Moroney 2025-09-11 20:15:00 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091146-CVE-2025-39761-939b@gregkh/T
Comment 3 errata-xmlrpc 2025-10-06 22:51:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:17377 https://access.redhat.com/errata/RHSA-2025:17377
Comment 4 errata-xmlrpc 2025-10-13 08:59:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:17776 https://access.redhat.com/errata/RHSA-2025:17776