CVEvulnerability
CVE-2026-53211
5.5 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-06-25
- Last modified
- 2026-07-02
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-401
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.
Affected configurations
• linux linux kernel (>= 6.18 < 6.18.36)
• linux linux kernel (>= 6.19 < 7.0.13)
• linux linux kernel 7.1
Related
Weakness · CWE (1)
- CWE-401 Missing Release of Memory after Effective Lifetime weakness