CVE-2026-53211

Kernel stack disclosure via incomplete register initialization

Published Jun 25, 2026 · Updated Jun 25, 2026

Information disclosure in Linux Kernel 6.18 through 6.18.35 allows local users to read stale stack bytes through an nftables register load. NFT_META_BRI_IIFHWADDR reserves eight bytes, but nft_meta_bridge_get_eval() copies only the six-byte hardware address and leaves two bytes uninitialized. Affected releases also include 6.19 through 7.0.12 and 7.1-rc1 through 7.1-rc7; local rule evaluation is required.

CVSS severity5.5
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Linux Kernel 6.18 through 6.18.35 allows local users to read stale stack bytes through an nftables register load. NFT_META_BRI_IIFHWADDR reserves eight bytes, but nft_meta_bridge_get_eval() copies only the six-byte hardware address and leaves two bytes uninitialized. Affected releases also include 6.19 through 7.0.12 and 7.1-rc1 through 7.1-rc7; local rule evaluation is required.

The record

CVE
CVE-2026-53211
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.18
  2. Affected versionversion=cbd2257dc96e3e46217540fcb095a757ffa20d96 <07acb9798477535933bd658ac9fa85b6cb10d995
  3. Affected versionversion=cbd2257dc96e3e46217540fcb095a757ffa20d96 <c7d573551f9286100a055ef696cde6af54549677
  4. Affected versionversion=cbd2257dc96e3e46217540fcb095a757ffa20d96 <f1e81d571e375d10e50e852223593493d98c1bac

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.18; version=cbd2257dc96e3e46217540fcb095a757ffa20d96 <07acb9798477535933bd658ac9fa85b6cb10d995; version=cbd2257dc96e3e46217540fcb095a757ffa20d96 <c7d573551f9286100a055ef696cde6af54549677; version=cbd2257dc96e3e46217540fcb095a757ffa20d96 <f1e81d571e375d10e50e852223593493d98c1bac

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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