CVE-2022-49942
wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected When we are not connected to a channel, sending channel "switch"
announcement doesn't make any sense. The BSS list is empty in that case. This causes the for loop in
cfg80211_get_bss() to be bypassed, so the function returns NULL
(check line 1424 of net/wireless/scan.c), causing the WARN_ON()
in ieee80211_ibss_csa_beacon() to get triggered (check line 500
of net/mac80211/ibss.c), which was consequently reported on the
syzkaller dashboard. Thus, check if we have an existing connection before generating
the CSA beacon in ieee80211_ibss_finish_csa().
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected When we are not connected to a channel, sending channel "switch" announcement doesn't make any sense. The BSS list is empty in that case. This causes the for loop in cfg80211_get_bss() to be bypassed, so the function returns NULL (check line 1424 of net/wireless/scan.c), causing the WARN_ON() in ieee80211_ibss_csa_beacon() to get triggered (check line 500 of net/mac80211/ibss.c), which was consequently reported on the syzkaller dashboard. Thus, check if we have an existing connection before generating the CSA beacon in ieee80211_ibss_finish_csa().
CVSS Scores
SSVC
- Decision:-
Timeline
- 2025-06-18 CVE Reserved
- 2025-06-18 CVE Published
- 2025-06-18 CVE Updated
- 2025-06-18 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/cd7760e62c2ac8581f050b2d36501d1a60beaf83 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.13 < 4.9.328 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 4.9.328" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.13 < 4.14.293 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 4.14.293" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.13 < 4.19.258 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 4.19.258" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.13 < 5.4.213 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 5.4.213" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.13 < 5.10.142 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 5.10.142" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.13 < 5.15.66 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 5.15.66" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.13 < 5.19.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 5.19.8" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.13 < 6.0 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 6.0" | en |
Affected
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