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 Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jun 20, 2025 | Jun 20, 2025 |
| Dell Powerstore Dsa2025429 | — | Upgrade Dell PowerStoreOS to the latest version | Dec 3, 2025 | Dec 2, 2025 |
| Dell Powerstore Dsa2026039 | — | Upgrade Dell PowerStoreOS to the latest version | Jan 13, 2026 | Jan 6, 2026 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jun 18, 2025 |
| Ubuntu | — | Upgrade linux-ibm-5.4Upgrade linux-raspi-5.4Upgrade linux-awsUpgrade linux-azure-5.4Upgrade linuxUpgrade linux-lowlatency-hwe-5.15Upgrade linux-azureUpgrade linux-hwe-5.15Upgrade linux-iotUpgrade linux-bluefieldUpgrade linux-gcp-fipsUpgrade linux-hweUpgrade linux-gcp-4.15Upgrade linux-azure-4.15Upgrade linux-oracleUpgrade linux-ibmUpgrade linux-raspiUpgrade linux-oracle-5.4Upgrade linux-kvmUpgrade linux-gkeUpgrade linux-hwe-5.4Upgrade linux-gcp-5.15Upgrade linux-aws-5.15Upgrade linux-intel-iotgUpgrade linux-aws-5.4Upgrade linux-lowlatencyUpgrade linux-intel-iotg-5.15Upgrade linux-aws-hweUpgrade linux-realtimeUpgrade linux-azure-fipsUpgrade linux-riscv-5.15Upgrade linux-nvidiaUpgrade linux-fipsUpgrade linux-oracle-5.15Upgrade linux-azure-5.15Upgrade linux-gkeopUpgrade linux-gcp-5.4Upgrade linux-gcpUpgrade linux-aws-fips | Jun 26, 2025 | Jun 18, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Jun 18, 2025 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub