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CVE-2025-68185· NVD / CVE Program· CNA Linux

nfs4_setup_readdir(): insufficient locking for ->d_parent->d_inode dereferencing

In the Linux kernel, the following vulnerability has been resolved: nfs4_setup_readdir(): insufficient locking for ->d_parent->d_inode dereferencing Theoretically it's an oopsable race, but I don't believe one can manage to hit it on real hardware; might become doable on a KVM, but it still won't be easy to attack. Anyway, it's easy to deal with - since xdr_encode_hyper() is just a call of put_unaligned_be64(), we can put that under ->d_lock and be done with that.

—No exploit Fix available

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Published
Dec 16, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 10th percentile
CWE
—
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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%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Affected systems

—

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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 6025f641a0e30afdc5aa62017397b1860ad9f677affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before e6cafe71eb3b5579b245ba1bd528a181e77f3df1affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before fa4daf7d11e45b72aad5d943a7ab991f869fff79affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 504b3fb9948a9e96ebbabdee0d33966a8bab15cbaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before eacfd08b26a062f1095b18719715bc82ad35312eaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 40be5b9080114f18b0cea386db415b68a7273c1aaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before f5e570eaab36a110c6ffda32b87c51170990c2d1affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before a890a2e339b929dbd843328f9a92a1625404fe63affected · git
    • before 2.6.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.159-16.1.159-1
Debian:13linuxbefore 6.12.63-16.12.63-1
Debian:14linuxbefore 6.17.8-16.17.8-1

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
  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan
  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

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 Linux40be5b9080114f18b0cea386db415b68a7273c1aVendor (CNA)
Linux Linux504b3fb9948a9e96ebbabdee0d33966a8bab15cbVendor (CNA)
Linux Linux6025f641a0e30afdc5aa62017397b1860ad9f677Vendor (CNA)
Linux Linuxa890a2e339b929dbd843328f9a92a1625404fe63Vendor (CNA)
Linux Linuxe6cafe71eb3b5579b245ba1bd528a181e77f3df1Vendor (CNA)
Linux Linuxeacfd08b26a062f1095b18719715bc82ad35312eVendor (CNA)
Linux Linuxf5e570eaab36a110c6ffda32b87c51170990c2d1Vendor (CNA)
Linux Linuxfa4daf7d11e45b72aad5d943a7ab991f869fff79Vendor (CNA)
debian:linux6.1.159-1 · Debian:12Package 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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

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

All records