wifi: cfg80211: get the wiphy out of a dying network namespace

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Summary

CVECVE-2026-98330
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:25 UTC
Updated2026-10-06 09:18:25 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: get the wiphy out of a dying network namespace When a network namespace is destroyed, cfg80211_pernet_exit() moves any wiphy back to the initial namespace, and just warns if that fails. But moving an interface can fail (due to allocation failures), and then the wiphy is left behind with a garbage netns pointer: Kernel mode fault at addr 0x30 genlmsg_multicast_netns.constprop.0+0x46/0xcf [cfg80211] nl80211_notify_wiphy+0xcd/0xe8 [cfg80211] wiphy_unregister+0x169/0x3fc [cfg80211] Note that commit debac3a20dec ("net: Remove conflicting altnames for dying netns in __dev_change_net_namespace().") fixed another path that could reach it without allocation failures. Remove interfaces that cannot be moved instead of failing the switch, so that the wiphy always ends up in the initial namespace. In this case the netdev core will unregister the interfaces anyway.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 463d018323851a608eef52a9427b0585005c647f caa02072b2986d4b0e7a824de05782ef7b03a0ba git Not specified
CNA Linux Linux affected 463d018323851a608eef52a9427b0585005c647f b949b2720688691f1e41bdbfbe3df2b6dc77c34d git Not specified
CNA Linux Linux affected 463d018323851a608eef52a9427b0585005c647f 4635b1a1c1d693178a537446a6e09963f0fdae52 git Not specified
CNA Linux Linux affected 2.6.32 Not specified
CNA Linux Linux unaffected 2.6.32 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/b949b2720688691f1e41bdbfbe3df2b6dc77c34d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4635b1a1c1d693178a537446a6e09963f0fdae52 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/caa02072b2986d4b0e7a824de05782ef7b03a0ba 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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