wifi: cfg80211: get the wiphy out of a dying network namespace
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.18.54, 7.2.8
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In 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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 463d018323851a608eef52a9427b0585005c647f · fixed in caa02072b2986d4b0e7a824de05782ef7b03a0ba; From 463d018323851a608eef52a9427b0585005c647f · fixed in b949b2720688691f1e41bdbfbe3df2b6dc77c34d; From 463d018323851a608eef52a9427b0585005c647f · fixed in 4635b1a1c1d693178a537446a6e09963f0fdae52
- Linux Linux
2.6.32
- KernelLinux
From 2.6.32 · fixed in 6.18.54; From 6.19.0 · fixed in 7.2.8