Use-after-free in Linux kernel - CVE-2026-93039
Published: September 18, 2026
Vulnerability identifier: #VU150988
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-2026-93039
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a use-after-free and double free.
The vulnerability exists due to a stale pointer after reallocation in meson_card_reallocate_links() when handling failure of the second memory reallocation after the first reallocation moves the DAI link array. A local user can cause the second memory reallocation to fail after the first reallocation moves the DAI link array to trigger a use-after-free and double free.
Affected software
Linux kernel
How to mitigate CVE-2026-93039
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/0b30fbe6bf7cf6499b19dd886f466e7c9e820089
- https://git.kernel.org/stable/c/1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642
- https://git.kernel.org/stable/c/2aaa41cf974f83a6fb105422bac4e2f107150774
- https://git.kernel.org/stable/c/41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab
- https://git.kernel.org/stable/c/5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe
- https://git.kernel.org/stable/c/8db0a0fc84e80aa9924e0833aef6cc95df94e5a7
- https://git.kernel.org/stable/c/8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d
- https://git.kernel.org/stable/c/de33afc57f24538186bccf4c4f6c65dd38634fd8