wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.26 % · percentile 18 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Analyzed
Description
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().
Weaknesses (CWE)
- CWE-476 — NULL Pointer Dereference
References
- https://git.kernel.org/stable/c/cdb9a8da9b84800eb15506cd9363cf0cf059e677
- https://git.kernel.org/stable/c/1691a48aef0a82d1754b9853dae7e3f5cacdf70b
- https://git.kernel.org/stable/c/d9eb37db6a28b59a95a3461450ee209654c5f95b
- https://git.kernel.org/stable/c/66689c5c02acd4d76c28498fe220998610aec61e
- https://git.kernel.org/stable/c/dd649b49219a0388cc10fc40e4c2ea681566a780
- https://git.kernel.org/stable/c/552ba102a6898630a7d16887f29e606d6fabe508
- https://git.kernel.org/stable/c/864e280cb3a9a0f5212b16ef5057c4e692f7039d
- https://git.kernel.org/stable/c/15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2022-55224
- GCVE · GCVE-0-2022-49942
CERT-FR advisories
- CERTFR-2026-AVI-0081 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1009 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0649 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0607 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0587 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 3.13 < 4.9.328cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.10 < 4.14.293cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.15 < 4.19.258cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.20 < 5.4.213cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.142cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.66cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 5.19.8cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected cd7760e62c2ac8581f050b2d36501d1a60beaf83 < cdb9a8da9b84800eb15506cd9363cf0cf059e677 ; affected cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 1691a48aef0a82d1754b9853dae7e3f5cacdf70b ; affected cd7760e62c2ac8581f050b2d36501d1a60beaf83 < d9eb37db6a28b59a95a3461450ee209654c5f95b ; affected cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 66689c5c02acd4d76c28498fe220998610aec61e ; affected cd7760e62c2ac8581f050b2d36501d1a60beaf83 < dd649b49219a0388cc10fc40e4c2ea681566a780 ; affected cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 552ba102a6898630a7d16887f29e606d6fabe508 |
| Linux · Linux | affected 3.13 ; unaffected 0 < 3.13 ; unaffected 4.9.328 ≤ 4.9.* ; unaffected 4.14.293 ≤ 4.14.* ; unaffected 4.19.258 ≤ 4.19.* ; unaffected 5.4.213 ≤ 5.4.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |