wifi: mac80211: abort chanswitch when leaving a mesh

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Summary

CVECVE-2026-98335
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:26 UTC
Updated2026-10-06 09:18:26 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b8456a14e9d2770846fcf74de18ff95b676149a3 bc544ef02327edf61c94d2b6bae9d14b217009b2 git Not specified
CNA Linux Linux affected b8456a14e9d2770846fcf74de18ff95b676149a3 2e1d6e80148495e728a85a9250176f266312e55c git Not specified
CNA Linux Linux affected b8456a14e9d2770846fcf74de18ff95b676149a3 d222fdc973bb8dbf0357772bd9042ffdc8291939 git Not specified
CNA Linux Linux affected b8456a14e9d2770846fcf74de18ff95b676149a3 ac7472a24bd433b81c06582835dd1d5547c10da9 git Not specified
CNA Linux Linux affected 3.13 Not specified
CNA Linux Linux unaffected 3.13 semver Not specified
CNA Linux Linux unaffected 6.12.112 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.54 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/2e1d6e80148495e728a85a9250176f266312e55c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ac7472a24bd433b81c06582835dd1d5547c10da9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d222fdc973bb8dbf0357772bd9042ffdc8291939 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bc544ef02327edf61c94d2b6bae9d14b217009b2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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