SB2026062542 - Use-after-free in Linux kernel realtek rtlwifi driver
Published: June 25, 2026
Security Bulletin ID
SB2026062542
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-53112)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in irq_prepare_bcn_tasklet in the rtlwifi PCI driver when handling beacon interrupts during device probe failure or device detachment. A local user can trigger the affected code path to cause a denial of service.
The issue occurs because a pending or running tasklet may access a freed ieee80211_hw object.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/008c456b76e9070979bc0e763897a5d3b0fdd4dc
- https://git.kernel.org/stable/c/039cd522dc70151da13329a5e3ae19b1736f468a
- https://git.kernel.org/stable/c/3c0e8a3179e6325a7dc6ce221aef0e03d854ab4b
- https://git.kernel.org/stable/c/7731b67bd59d1284d150cbe40a47e95a10613234
- https://git.kernel.org/stable/c/aa10a452e34810987fb9f4a047995b30003fb53f
- https://git.kernel.org/stable/c/ae10d4a1ab6bcaa1336abb171908a9a365761d3e
- https://git.kernel.org/stable/c/e40873820c9d245ce482faa7ad514ebdb3b8d23d
- https://git.kernel.org/stable/c/fac1079e0fdec6df6d7562c21941587236dc3def