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CVE-2026-98335

Linux: wifi: mac80211: abort chanswitch when leaving a mesh

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.18%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2e1d6e80148495e728a85a9250176f266312e55cFixed versionCVE List
Published6 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 2e1d6e80148495e728a85a9250176f266312e55cLinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 10

  • Linuxaffected: b8456a14e9d2770846fcf74de18ff95b676149a3 before bc544ef02327edf61c94d2b6bae9d14b217009b2CVE List
  • Linuxaffected: b8456a14e9d2770846fcf74de18ff95b676149a3 before 2e1d6e80148495e728a85a9250176f266312e55cCVE List
  • Linuxaffected: b8456a14e9d2770846fcf74de18ff95b676149a3 before d222fdc973bb8dbf0357772bd9042ffdc8291939CVE List
  • Linuxaffected: b8456a14e9d2770846fcf74de18ff95b676149a3 before ac7472a24bd433b81c06582835dd1d5547c10da9CVE List
  • Linuxaffected: 3.13CVE List
  • Linuxunaffected: all versions before 3.13CVE List
  • Linuxunaffected: 6.12.112 through 6.12.*CVE List
  • Linuxunaffected: 6.18.54 through 6.18.*CVE List
  • Linuxunaffected: 7.2.8 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 4