Use of Uninitialized Variable in Linux kernel - CVE-2026-53211
Published: June 26, 2026
Vulnerability identifier: #VU135578
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53211
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 disclose sensitive information.
The vulnerability exists due to an uninitialized memory exposure in nft_meta_bridge_get_eval() when handling NFT_META_BRI_IIFHWADDR register data. A local user can trigger a downstream load of the affected register span to disclose sensitive information.
The issue occurs because only 6 bytes are copied into a declared 8-byte destination register span, leaving 2 bytes of stale stack data available to userspace.
How to mitigate CVE-2026-53211
Install security update from vendor's repository.