SB20260815282 - Use of Uninitialized Variable in Linux kernel bridge netfilter
Published: August 15, 2026
Security Bulletin ID
SB20260815282
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use of Uninitialized Variable (CVE-ID: CVE-2026-72433)
CWE-ID: CWE-457 - Use of Uninitialized Variable
CVSSv4: 4.8 [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]
The vulnerability allows a local attacker to disclose sensitive information.
The vulnerability exists due to uninitialized memory exposure in nft_meta_bridge_get_eval in nft_meta_bridge.c when evaluating the NFT_META_BRI_IIFPVID metadata expression. A local attacker can trigger processing of a bridge interface PVID query that encounters an error condition to disclose sensitive information.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/27dd2997746d54ebc079bb13161cc1bdd401d4a6
- https://git.kernel.org/stable/c/4dce8bf588a89bef99b446136d15685a837e7acf
- https://git.kernel.org/stable/c/7e23965d44f06ed93fb5362fb1e321b769eecc3b
- https://git.kernel.org/stable/c/92c9682b36f0c8f7a1f14d4558b72793f62e90a1
- https://git.kernel.org/stable/c/a853c3769b73ceb2d2b735aff621d1d51fe0553d
- https://git.kernel.org/stable/c/b1b0b9efe641afa5c2d4ba2ec77aed7b6f4bc398
- https://git.kernel.org/stable/c/c37a39b963034cc2d141baf46017614cb1fc275f
- https://git.kernel.org/stable/c/f73b7de5338fcca7f63ca88597a050c119501531