Use of Uninitialized Variable in Linux kernel - CVE-2026-23367
Published: March 25, 2026
Vulnerability identifier: #VU124465
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23367
CWE-ID: CWE-457
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to improper initialization in the radiotap parser component when processing radiotap headers with undefined fields. A local user can provide a specially crafted radiotap header containing undefined field 18 to trigger uninitialized memory access and potentially execute arbitrary code.
The issue arises because iterator->_next_ns_data is not initialized when handling undefined fields in the standard radiotap namespace, leading to use of uninitialized data during subsequent checks.
How to mitigate CVE-2026-23367
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/129c8bb320a7cef692c78056ef8e89a2a12ba448
- https://git.kernel.org/stable/c/2a60c588d5d39ad187628f58395c776a97fd4323
- https://git.kernel.org/stable/c/2f8ceeba670610d66f77def32011f48de951d781
- https://git.kernel.org/stable/c/703fa979badbba83d31cd011606d060bfb8b0d1d
- https://git.kernel.org/stable/c/c854758abe0b8d86f9c43dc060ff56a0ee5b31e0
- https://git.kernel.org/stable/c/e664971759a0e5570b50c6592e58a7f97d55e992