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CVE-2026-43085

📛 CVE Title

netfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator

⬇ Download JSON ⚠ View as Threat

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator When batching multiple NFLOG messages (inst->qlen > 1), __nfulnl_send() appends an NLMSG_DONE terminator with sizeof(struct nfgenmsg) payload via nlmsg_put(), but never initializes the nfgenmsg bytes. The nlmsg_put() helper only zeroes alignment padding after the payload, not the payload itself, so four bytes of stale kernel heap data are leaked to userspace in the NLMSG_DONE message body. Use nfnl_msg_put() to build the NLMSG_DONE terminator, which initializes the nfgenmsg payload via nfnl_fill_hdr(), consistent with how __build_packet_message() already constructs NFULNL_MSG_PACKET headers.

Overview

State
PUBLISHED
Assigner (CNA)
Linux
CVSS severity
high
CVSS score
CVSS 7.1 / 10 7.1 7.1 / 10
CVSS vector
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Effective score
7.1 / 10 HIGH source: CNA overview
CWE(s)
—
Reserved
2026-05-01
Published
2026-05-06 09:40 UTC
Last updated
2026-05-12 00:17 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/43xxx/CVE-2026-43085.json
Linked Threat
CVE-2026-43085 — CVE-2026-43085

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-06 10:16:21 UTC
NVD last modified
2026-05-06 13:08:07 UTC
EPSS score
0.0002 (probability of exploitation in next 30 days)
EPSS percentile
6.96% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 09:17 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-27580
Assigner
Linux
Published
May 6, 2026, 7:40:19 AM
Updated
May 11, 2026, 10:17:26 PM
EUVD base score
0.0 / 10
EUVD-reported EPSS
0.0200
Vendors
Linux
Products
Linux (patch: 6.19.14)
Linux (patch: 6.12.83)
Linux (patch: 6.6.136)
Linux (29c5d4afba51c71cfeadd3f74f3c42e064483fb0 <1f3083aec8836213da441270cdb1ab612dd82cf4)
Linux (patch: 7.0)
Linux (patch: 0)
Linux (29c5d4afba51c71cfeadd3f74f3c42e064483fb0 <d1399632ba255d2e02c757af5d9f5d9279ce168c)
Linux (29c5d4afba51c71cfeadd3f74f3c42e064483fb0 <15d209bccf9273b4a8b4e579ba0e92d065b6ec8c)
Linux (29c5d4afba51c71cfeadd3f74f3c42e064483fb0 <368c22aea490f6f50df831b4f9e3623787686c5b)
Linux (2.6.23)
Linux (patch: 6.18.24)
Linux (29c5d4afba51c71cfeadd3f74f3c42e064483fb0 <d552bcfca323d175664d7444989b04f55666978a)

ENISA description: In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator When batching multiple NFLOG messages (inst->qlen > 1), __nfulnl_send() appends an NLMSG_DONE terminator with sizeof(struct nfgenmsg) payload via nlmsg_put(), but never initializes the nfgenmsg bytes. The nlmsg_put() helper only zeroes alignment padding after the payload, not the payload itself, so four bytes of stale kernel heap data are leaked to userspace in the NLMSG_DONE message body. Use nfnl_msg_put() to build the NLMSG_DONE terminator, which initializes the nfgenmsg payload via nfnl_fill_hdr(), consistent with how __build_packet_message() already constructs NFULNL_MSG_PACKET headers.

EUVD references (5)

Affected products (2)
VendorProductVersionsPlatforms
Linux Linux 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 (affected), 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 (affected), 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 (affected), 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 (affected), 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 (affected) —
Linux Linux 2.6.23 (affected), 0 (unaffected), 6.6.136 (unaffected), 6.12.83 (unaffected), 6.18.24 (unaffected), 6.19.14 (unaffected), 7.0 (unaffected) —

Vendor references (5)

References embedded in the original CVE record by the assigning CNA.

MITRE references (5) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (6)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (5)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (17)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • Security updates for Adobe Acrobat and Reader
    web:helpx.adobe.com

    Security updates for Adobe Acrobat and Reader Last updated on Apr 14, 2026 | Also applies to Adobe Acrobat

    2026-05-23 21:13 UTC
  • Nvd - Cve-2026-45585
    web:nvd.nist.gov

    An official website of the United States government Here's how you know

    2026-05-23 21:13 UTC
  • Security Update Guide - Microsoft
    web:portal.msrc.microsoft.com

    The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

    2026-05-23 21:13 UTC
  • VMware ESXi 8.0 Update 3d Release Notes
    web:techdocs.broadcom.com

    What's New This release resolves CVE -2025-22224, CVE -2025-22225, and CVE -2025-22226. For more information on these vulnerabilities and their impact on Broadcom products, see VMSA-2025-0004.

    2026-05-23 21:13 UTC
  • April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
    web:www.crowdstrike.com

    Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

    2026-05-23 21:13 UTC
  • Microsoft Rushes Out Emergency Mitigation For 'YellowKey ... - LinkedIn
    web:www.linkedin.com

    Microsoft Security Response Center has issued an emergency mitigation for a newly disclosed BitLocker bypass vulnerability known as "YellowKey," after security researchers publicly released ...

    2026-05-23 21:13 UTC
  • Microsoft mitigates YellowKey BitLocker bypass, no patch yet
    web:www.notebookcheck.net

    Microsoft released mitigation steps for YellowKey ( CVE - 2026 -45585), a BitLocker bypass that grants physical attackers access to encrypted Windows drives.

    2026-05-23 21:13 UTC
  • Critical Patch Updates, Critical Security Patch Updates ... - Oracle
    web:www.oracle.com

    Critical Security Patch Updates Critical Security Patch Updates provide security patches for supported Oracle on-premises products. A Critical Security Patch Update provides targeted, high-priority security fixes in a smaller, more focused format, making them easier to apply with minimal disruption.

    2026-05-23 21:13 UTC
  • Microsoft Issues Massive Windows Patch for 160+ Bugs ... - TechRepublic
    web:www.techrepublic.com

    Microsoft's April 2026 Patch Tuesday fixes 165 vulnerabilities, including two zero-days, in one of the company's largest monthly security updates.

    2026-05-23 21:13 UTC
  • Patch Tuesday May 2026: Security Updates & CVE Analysis
    web:zecurit.com

    Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

    2026-05-23 21:13 UTC
  • Microsoft Releases Mitigation for Windows BitLocker Security Bypass 0 ...
    web:cybersecuritynews.com

    No patch has been released yet; Microsoft has instead issued a multi-step manual mitigation guide while a formal security update is prepared. Windows BitLocker Security Bypass The vulnerability originates in WinRE's handling of the BootExecute registry value under HKLM\ControlSet001\Control\Session Manager.

    2026-06-03 07:49 UTC
  • Security Update Guide - Microsoft
    web:msrc.microsoft.com

    The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

    2026-06-03 07:49 UTC
  • MC1318295: Mitigation guidance updated with a new script for ... - PUPUWEB
    web:pupuweb.com

    Microsoft has updated the mitigation guidance in CVE - 2026 -45585, a Windows BitLocker security feature bypass vulnerability. The updated guidance replaces previously documented manual mitigation steps with a script that helps reduce exposure while a future security update is developed to address this vulnerability.

    2026-06-03 07:49 UTC
  • CVE-2026-45585: YellowKey BitLocker Bypass - socprime.com
    web:socprime.com

    BitLocker is designed to protect data at rest even when a device is lost, stolen, or powered off, which is why a bypass against that trust model draws immediate attention. The CVE - 2026 -45585 vulnerability, publicly referred to as YellowKey, is a Windows security feature bypass flaw that Microsoft says can let an attacker with physical access sidestep BitLocker protections and access encrypted ...

    2026-06-03 07:49 UTC
  • Microsoft provides mitigation for "YellowKey" BitLocker bypass flaw ...
    web:www.helpnetsecurity.com

    Microsoft is working on a fix for CVE - 2026 -45585 (aka "Yellowkey"), a vulnerability that can be used to bypass Windows' BitLocker protection.

    2026-06-03 07:49 UTC
  • Microsoft Defender vulnerabilities are being exploited in the wild
    web:www.malwarebytes.com

    The KEV catalog tracks vulnerabilities known to be exploited in the wild and sets patch deadlines for Federal Civilian Executive Branch (FCEB) agencies. Five of the added vulnerabilities are quite old by vulnerability standards. Patches were released in 2008, 2009, and 2010. But the Microsoft Defender vulnerabilities are from this year. Those ...

    2026-06-03 07:49 UTC
  • Oracle Critical Patch Update Advisory - April 2025
    web:www.oracle.com

    Oracle Critical Patch Update Advisory - April 2025 Description A Critical Patch Update is a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical Patch ...

    2026-06-03 07:49 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-43085.json.

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      "providerMetadata": {
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        "shortName": "Linux"
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        },
        {
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        }
      ],
      "title": "netfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator",
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    "cveId": "CVE-2026-43085",
    "datePublished": "2026-05-06T07:40:19.915Z",
    "dateReserved": "2026-05-01T14:12:55.983Z",
    "dateUpdated": "2026-05-11T22:17:26.120Z",
    "state": "PUBLISHED"
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