# CVE-2026-53211: linux: In the Linux kernel, the following vulnerability has been resolved:  netfilter: nft_meta_bridge: fix stale stack leak...

CVE-2026-53211 is fixed in linux on 1 platform by DEBIAN-CVE-2026-53211 (version 7.0.13-1), released June 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-53211
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 25, 2026

## Description

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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.0.13-1 | [DEBIAN-CVE-2026-53211](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53211.md) | Jun 28, 2026 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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