Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: reset state when starting AP fails ieee80211_start_ap() can set enable_beacon (and beacon_int) and fail later, leaving it set forever. Scanning can then attempt to restore beaconing on such an interface, leading to: Oops: divide error: 0000 [#1] SMP KASAN NOPTI RIP: 0010:mac80211_hwsim_link_info_changed+0xca7/0xf00 Call Trace: drv_link_info_changed+0x413/0x860 net/mac80211/driver-ops.c:495 ieee80211_link_info_change_notify+0x24b/0x3c0 net/mac80211/main.c:427 ieee80211_offchannel_return+0x381/0x580 net/mac80211/offchannel.c:160 __ieee80211_scan_completed+0x993/0xe30 net/mac80211/scan.c:519 ieee80211_scan_work+0x472/0x2010 net/mac80211/scan.c:1193 cfg80211_wiphy_work+0x2b7/0x550 net/wireless/core.c:538 in hwsim. Also, cfg80211 then allows changing the interface type, and the off-channel path getgs confused about beaconing as well, leading to another warning: WARNING: net/mac80211/driver-ops.c:468 at drv_link_info_changed+0x583/0x880 ieee80211_link_info_change_notify+0x24b/0x3c0 net/mac80211/main.c:427 ieee80211_offchannel_stop_vifs+0x328/0x5c0 net/mac80211/offchannel.c:122 ieee80211_start_sw_scan net/mac80211/scan.c:583 [inline] __ieee80211_start_scan+0xfb6/0x1af0 net/mac80211/scan.c:882 Reset the state on failures to always have it correct.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d6a83228823fc0cc8d79d95c9f0bf568b7317862 before d83da43e9b3b3b1bad99ac5a1065f1c63ad5fc32; affected d6a83228823fc0cc8d79d95c9f0bf568b7317862 before 5d5ff5b36f5748a2a077f875a73ccb26860d3fcc; affected d6a83228823fc0cc8d79d95c9f0bf568b7317862 before 6eac225f59c1c2277ac74f8a716d6df0ba3b8d28; affected d6a83228823fc0cc8d79d95c9f0bf568b7317862 before 3f28551d0241254a75626d868041c6340285088b |
| Linux / Linux | affected 3.9; unaffected 0 before 3.9; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.