Use-after-free in Linux kernel - CVE-2026-98194
Published: October 7, 2026
Vulnerability identifier: #VU153828
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98194
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause the kernel to dereference freed memory.
The vulnerability exists due to use-after-free in lbtf_free_adapter() in the libertas_tf wireless driver when freeing command buffers while the command timer callback is still running. A local user can cause adapter cleanup to overlap with an active command timer callback to cause the kernel to dereference freed memory.
The command_timer_fn callback accesses priv->cur_cmd->cmdbuf.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98194
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External References
- https://git.kernel.org/stable/c/04c837d413dc11a91e0275b08b9e35a6c111175e
- https://git.kernel.org/stable/c/2b99bfc5a127ce8cd6a887d82815fc2e712f365b
- https://git.kernel.org/stable/c/3fb3663260ec396f86b733aab9f81fac6669d2fa
- https://git.kernel.org/stable/c/41b1a4d545ec348b7d5324b6d4f4c6a3e0326d46
- https://git.kernel.org/stable/c/b4745d6063758c681d33affca9733bbd356b6ea1
- https://git.kernel.org/stable/c/bbb9a0ab96d44a64529aafc7a16de460a1712f6a
- https://git.kernel.org/stable/c/e82536aad653e27c8ca7a8e0f6f816bc3f853ec3
- https://git.kernel.org/stable/c/f6c3fa0d17ca0c9e6033bb45f52e33b27a9a40e6