EUVD-2026-15299
GHSA-rgr3-h3cv-574x
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
6DescriptionNVD
In the Linux kernel, the following vulnerability has been resolved:
wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
There is a use-after-free error in cfg80211_shutdown_all_interfaces found by syzkaller:
BUG: KASAN: use-after-free in cfg80211_shutdown_all_interfaces+0x213/0x220 Read of size 8 at addr ffff888112a78d98 by task kworker/0:5/5326 CPU: 0 UID: 0 PID: 5326 Comm: kworker/0:5 Not tainted 6.19.0-rc2 #2 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: events cfg80211_rfkill_block_work Call Trace: <TASK> dump_stack_lvl+0x116/0x1f0 print_report+0xcd/0x630 kasan_report+0xe0/0x110 cfg80211_shutdown_all_interfaces+0x213/0x220 cfg80211_rfkill_block_work+0x1e/0x30 process_one_work+0x9cf/0x1b70 worker_thread+0x6c8/0xf10 kthread+0x3c5/0x780 ret_from_fork+0x56d/0x700 ret_from_fork_asm+0x1a/0x30 </TASK>
The problem arises due to the rfkill_block work is not cancelled when wiphy is being unregistered. In order to fix the issue cancel the corresponding work in wiphy_unregister().
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
AnalysisAI
Use-after-free in Linux kernel cfg80211 WiFi subsystem allows local authenticated users with low privileges to achieve high impact on confidentiality, integrity, and availability through rfkill work-queue exploitation. The vulnerability affects Linux kernel versions 2.6.31 through 6.19-rc2, with patches released for stable branches 6.1.167, 6.6.130, 6.12.77, 6.18.17, 6.19.7, and 7.0-rc2. …
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RemediationAI
Within 24 hours: Inventory all Linux systems running kernel versions 2.6.31 through 6.19-rc2 and identify which are in production. Within 7 days: Apply vendor-released patches (kernel 6.1.167, 6.6.130, 6.12.77, 6.18.17, 6.19.7, or 7.0-rc2 depending on your current version) to non-critical systems and lab environments for validation. …
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Vendor StatusVendor
Debian
| Release | Status | Fixed Version | Urgency |
|---|---|---|---|
| bullseye | vulnerable | 5.10.223-1 | - |
| bullseye (security) | vulnerable | 5.10.251-1 | - |
| bookworm | vulnerable | 6.1.159-1 | - |
| bookworm (security) | vulnerable | 6.1.164-1 | - |
| trixie | vulnerable | 6.12.73-1 | - |
| trixie (security) | vulnerable | 6.12.74-2 | - |
| forky, sid | fixed | 6.19.8-1 | - |
| (unstable) | fixed | 6.19.8-1 | - |
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