Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-53211

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
25/06/2026
Last modified:
02/07/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register<br /> <br /> NFT_META_BRI_IIFHWADDR declares its destination register with<br /> len = ETH_ALEN (6 bytes), which the register-init tracking rounds up to<br /> two 32-bit registers (8 bytes). nft_meta_bridge_get_eval() then does<br /> memcpy(dest, br_dev-&gt;dev_addr, ETH_ALEN), writing only 6 bytes and<br /> leaving the upper 2 bytes of the second register as uninitialised<br /> nft_do_chain() stack. A downstream load of that register span leaks<br /> those stale bytes to userspace.<br /> <br /> Zero the second register before the memcpy so the full declared span is<br /> written.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.18 (including) 6.18.36 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 7.0.13 (excluding)
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools