CVE-2022-49942 (GCVE-0-2022-49942)

Vulnerability from cvelistv5 – Published: 2025-06-18 10:59 – Updated: 2026-05-11 19:09
VLAI?
Title
wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected
Summary
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().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < cdb9a8da9b84800eb15506cd9363cf0cf059e677 (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < 1691a48aef0a82d1754b9853dae7e3f5cacdf70b (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < d9eb37db6a28b59a95a3461450ee209654c5f95b (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < 66689c5c02acd4d76c28498fe220998610aec61e (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < dd649b49219a0388cc10fc40e4c2ea681566a780 (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < 552ba102a6898630a7d16887f29e606d6fabe508 (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < 864e280cb3a9a0f5212b16ef5057c4e692f7039d (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < 15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0 (git)
Create a notification for this product.
Linux Linux Affected: 3.13
Unaffected: 0 , < 3.13 (semver)
Unaffected: 4.9.328 , ≤ 4.9.* (semver)
Unaffected: 4.14.293 , ≤ 4.14.* (semver)
Unaffected: 4.19.258 , ≤ 4.19.* (semver)
Unaffected: 5.4.213 , ≤ 5.4.* (semver)
Unaffected: 5.10.142 , ≤ 5.10.* (semver)
Unaffected: 5.15.66 , ≤ 5.15.* (semver)
Unaffected: 5.19.8 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.