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NVD / CVE Program· CNA Linux

CVE-2025-68374: md: fix rcu protection in md_wakeup_thread

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 0dc76205549b4c25705e54345f211b9f66e018a0, 21989cb5034c835b212385a2afadf279d8069da0, a4bd1caf591faeae44cb10b6517e7dacb5139bda; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 0dc76205549b4c25705e54345f211b9f66e018a0, 21989cb5034c835b212385a2afadf279d8069da0, a4bd1caf591faeae44cb10b6517e7dacb5139bda; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: md: fix rcu protection in md_wakeup_thread We attempted to use RCU to protect the pointer 'thread', but directly passed the value when calling md_wakeup_thread(). This means that the RCU pointer has been acquired before rcu_read_lock(), which renders rcu_read_lock() ineffective and could lead to a use-after-free.

—No exploit Fix available
Published
Dec 24, 2025
Updated
Oct 21, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 6.5affected
    • 4469315439827290923fce4f3f672599cabeb366 and later · before dc6d1249ee35c1c76700b4b96281daeb7637bce1affected · git
    • 4469315439827290923fce4f3f672599cabeb366 and later · before 21989cb5034c835b212385a2afadf279d8069da0affected · git
    • 4469315439827290923fce4f3f672599cabeb366 and later · before a4bd1caf591faeae44cb10b6517e7dacb5139bdaaffected · git
    • 4469315439827290923fce4f3f672599cabeb366 and later · before f98b191f78124405294481dea85f8a22a3eb0a59affected · git
    • 4469315439827290923fce4f3f672599cabeb366 and later · before 0dc76205549b4c25705e54345f211b9f66e018a0affected · git
    • before 6.5not affected · semver
    • 6.6.160 and later · up to and including 6.6.*not affected · semver
    • 6.12.63 and later · up to and including 6.12.*not affected · semver
    • 6.17.13 and later · up to and including 6.17.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:13linuxbefore 6.12.63-16.12.63-1
Debian:14linuxbefore 6.17.13-16.17.13-1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_10before 1-150700.15.3.11-150700.15.3.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7-RT_Update_10before 1-150700.1.3.11-150700.1.3.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-64kbbefore 6.4.0-150700.53.34.16.4.0-150700.53.34.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-defaultbefore 6.4.0-150700.53.34.16.4.0-150700.53.34.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-default-basebefore 6.4.0-150700.53.34.1.150700.17.23.16.4.0-150700.53.34.1.150700.17.23.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-sourcebefore 6.4.0-150700.53.34.16.4.0-150700.53.34.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-zfcpdumpbefore 6.4.0-150700.53.34.16.4.0-150700.53.34.1
SUSE:Linux Enterprise Module for Development Tools 15 SP7kernel-docsbefore 6.4.0-150700.53.34.16.4.0-150700.53.34.1
SUSE:Linux Enterprise Module for Development Tools 15 SP7kernel-obs-buildbefore 6.4.0-150700.53.34.16.4.0-150700.53.34.1
SUSE:Linux Enterprise Module for Development Tools 15 SP7kernel-symsbefore 6.4.0-150700.53.34.16.4.0-150700.53.34.1
SUSE:Linux Enterprise Module for Public Cloud 15 SP7kernel-azurebefore 6.4.0-150700.53.34.16.4.0-150700.53.34.1
SUSE:Linux Micro 6.1kernel-defaultbefore 6.4.0-40.16.4.0-40.1
SUSE:Linux Micro 6.1kernel-default-basebefore 6.4.0-40.1.21.176.4.0-40.1.21.17
SUSE:Linux Micro 6.1kernel-kvmsmallbefore 6.4.0-40.16.4.0-40.1
SUSE:Linux Micro 6.1kernel-sourcebefore 6.4.0-40.16.4.0-40.1
SUSE:Real Time Module 15 SP7kernel-rtbefore 6.4.0-150700.7.34.16.4.0-150700.7.34.1
SUSE:Real Time Module 15 SP7kernel-source-rtbefore 6.4.0-150700.7.34.16.4.0-150700.7.34.1
SUSE:Real Time Module 15 SP7kernel-syms-rtbefore 6.4.0-150700.7.34.16.4.0-150700.7.34.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-68372Dec 24, 2025 · nbd: defer config put in recv_work
    0Monitor
  • ← EarlierCVE-2025-68373Dec 24, 2025 · md: avoid repeated calls to del_gendisk
    0Monitor
  • Later →CVE-2025-68375Dec 24, 2025 · perf/x86: Fix NULL event access and potential PEBS record loss
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0dc76205549b4c25705e54345f211b9f66e018a0Vendor (CNA)
Linux Linux21989cb5034c835b212385a2afadf279d8069da0Vendor (CNA)
Linux Linuxa4bd1caf591faeae44cb10b6517e7dacb5139bdaVendor (CNA)
Linux Linuxdc6d1249ee35c1c76700b4b96281daeb7637bce1Vendor (CNA)
Linux Linuxf98b191f78124405294481dea85f8a22a3eb0a59Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.63-1 · Debian:13Package registry (OSV)
suse:kernel-64kb6.4.0-150700.53.34.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:kernel-default6.4.0-150700.53.34.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:kernel-default-base6.4.0-150700.53.34.1.150700.17.23.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:kernel-docs6.4.0-150700.53.34.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7-RT_Update_101-150700.1.3.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-obs-build6.4.0-150700.53.34.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7Package registry (OSV)
suse:kernel-rt6.4.0-150700.7.34.1 · SUSE:Real Time Module 15 SP7Package registry (OSV)
suse:kernel-source6.4.0-150700.53.34.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:kernel-source-rt6.4.0-150700.7.34.1 · SUSE:Real Time Module 15 SP7Package registry (OSV)
suse:kernel-syms6.4.0-150700.53.34.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7Package registry (OSV)
suse:kernel-syms-rt6.4.0-150700.7.34.1 · SUSE:Real Time Module 15 SP7Package registry (OSV)
suse:kernel-zfcpdump6.4.0-150700.53.34.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records