High 8.8Published Apr 16, 2025

CVE-2025-23133wifi: ath11k: update channel list in reg notifier instead reg worker

Updated under an hour ago (2026-10-19 08:00 UTC)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: update channel list in reg notifier instead reg worker Currently when ath11k gets a new channel list, it will be processed according to the following steps: 1. update new channel list to cfg80211 and queue reg_work. 2. cfg80211 handles new channel list during reg_work. 3. update cfg80211's handled channel list to firmware by ath11k_reg_update_chan_list(). But ath11k will immediately execute step 3 after reg_work is just queued. Since step 2 is asynchronous, cfg80211 may not have completed handling the new channel list, which may leading to an out-of-bounds write error: BUG: KASAN: slab-out-of-bounds in ath11k_reg_update_chan_list Call Trace: ath11k_reg_update_chan_list+0xbfe/0xfe0 [ath11k] kfree+0x109/0x3a0 ath11k_regd_update+0x1cf/0x350 [ath11k] ath11k_regd_update_work+0x14/0x20 [ath11k] process_one_work+0xe35/0x14c0 Should ensure step 2 is completely done before executing step 3. Thus Wen raised patch[1]. When flag NL80211_REGDOM_SET_BY_DRIVER is set, cfg80211 will notify ath11k after step 2 is done. So enable the flag NL80211_REGDOM_SET_BY_DRIVER then cfg80211 will notify ath11k after step 2 is done. At this time, there will be no KASAN bug during the execution of the step 3. [1] https://patchwork.kernel.org/project/linux-wireless/patch/20230201065313.27203-1-quic_wgong@quicinc.com/ Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f45cb6b29cd36514e13f7519770873d8c0457008 before 26618c039b78a76c373d4e02c5fbd52e3a73aead; from f45cb6b29cd36514e13f7519770873d8c0457008 before f952fb83c9c6f908d27500764c4aee1df04b9d3f; from f45cb6b29cd36514e13f7519770873d8c0457008 before 933ab187e679e6fbdeea1835ae39efcc59c022d2; f96fd36936310cefe0ea1370a9ae30e6746e6f62; c97b120950b49d76bdce013bd4d9577d769465f4; from 5.15.79 before 5.16; from 6.0.9 before 6.1	CNA record
linux linux_kernel linux:linux_kernel	from 5.15.79 before 5.16; from 6.0.9 before 6.1; from 6.1.1 before 6.12.46; from 6.13 before 6.14.2; 6.1; 6.1; 6.1; 6.1; and 1 more ranges	NVD

References

https://git.kernel.org/stable/c/26618c039b78a76c373d4e02c5fbd52e3a73aeadpatch
https://git.kernel.org/stable/c/f952fb83c9c6f908d27500764c4aee1df04b9d3fpatch
https://git.kernel.org/stable/c/933ab187e679e6fbdeea1835ae39efcc59c022d2patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.