Cloudanix VulnDB

CVE-2026-23281

High · 7.8

CVSS

7.8

EPSS

0.1%

Published

Mar 25, 2026

CISA due date

—

The record

In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix use-after-free in lbs_free_adapter() The lbs_free_adapter() function uses timer_delete() (non-synchronous) for both command_timer and tx_lockup_timer before the structure is freed. This is incorrect because timer_delete() does not wait for any running timer callback to complete. If a timer callback is executing when lbs_free_adapter() is called, the callback will access freed memory since lbs_cfg_free() frees the containing structure immediately after lbs_free_adapter() returns. Both timer callbacks (lbs_cmd_timeout_handler and lbs_tx_lockup_handler) access priv->driver_lock, priv->cur_cmd, priv->dev, and other fields, which would all be use-after-free violations. Use timer_delete_sync() instead to ensure any running timer callback has completed before returning. This bug was introduced in commit 8f641d93c38a ("libertas: detect TX lockups and reset hardware") where del_timer() was used instead of del_timer_sync() in the cleanup path. The command_timer has had the same issue since the driver was first written.

Affected packages

Ecosystem Package Introduced Fixed
openSUSE:Leap 16.0 dtb-aarch64 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-64kb 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-azure 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-default 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-default-base 0 6.12.0-160000.27.1.160000.2.8
openSUSE:Leap 16.0 kernel-docs 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-kvmsmall 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-obs-build 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-obs-qa 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-rt 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-source 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-syms 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-zfcpdump 0 6.12.0-160000.28.1

Related vulnerabilities