GHSA-8775-7CPF-RM3F
Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-14 21:30
VLAI
Details
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
5.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2022-49942"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-18T11:15:21Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: Don\u0027t finalize CSA in IBSS mode if state is disconnected\n\nWhen we are not connected to a channel, sending channel \"switch\"\nannouncement doesn\u0027t make any sense.\n\nThe BSS list is empty in that case. This causes the for loop in\ncfg80211_get_bss() to be bypassed, so the function returns NULL\n(check line 1424 of net/wireless/scan.c), causing the WARN_ON()\nin ieee80211_ibss_csa_beacon() to get triggered (check line 500\nof net/mac80211/ibss.c), which was consequently reported on the\nsyzkaller dashboard.\n\nThus, check if we have an existing connection before generating\nthe CSA beacon in ieee80211_ibss_finish_csa().",
"id": "GHSA-8775-7cpf-rm3f",
"modified": "2025-11-14T21:30:27Z",
"published": "2025-06-18T12:30:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49942"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1691a48aef0a82d1754b9853dae7e3f5cacdf70b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/552ba102a6898630a7d16887f29e606d6fabe508"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/66689c5c02acd4d76c28498fe220998610aec61e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/864e280cb3a9a0f5212b16ef5057c4e692f7039d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cdb9a8da9b84800eb15506cd9363cf0cf059e677"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d9eb37db6a28b59a95a3461450ee209654c5f95b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dd649b49219a0388cc10fc40e4c2ea681566a780"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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