What’s Vulnerable › Vulnerabilities

CVE-2025-39761: wifi: ath12k: Decrement TID on RX peer frag setup error handling

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-11 · updated 2026-10-19
• Weakness: CWE-125

Description

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.

Affected products

• Linux kernel: from 6.3 before 6.6.103; from 6.7 before 6.12.43; from 6.13 before 6.15.11; from 6.16 before 6.16.2 — fixed in 6.12.43, 6.15.11, 6.16.2, 6.6.103

How to fix

Upgrade to a fixed version: Linux kernel 6.12.43, 6.15.11, 6.16.2, 6.6.103. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/7c0884fcd2ddde0544d2e77f297ae461e1f53f58
• https://git.kernel.org/stable/c/7c3e99fd4a66a5ac9c7dd32db07359666efe0002
• https://git.kernel.org/stable/c/9530d666f4376c294cdf4348c29fe3542fec980a
• https://git.kernel.org/stable/c/a3b73c72c42348bf1555fd2b00f32f941324b242
• https://git.kernel.org/stable/c/eb1e1526b82b8cf31f1ef9ca86a2647fb6cd89c6

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