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NVD / CVE Program· CNA Linux

CVE-2025-71292: jfs: nlink overflow in jfs_rename

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.32% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 2108829a59f081e822fdab8c2cd7131deb8aa8a1, 5d77c36cd4b698649f5c30c5f6c084f4f61d1880, 9218dc26fd922b09858ecd3666ed57dfd8098da8.
  • Severity is disputed: the assigning authority (CNA) scores it 7.5, NVD 5.5.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 2108829a59f081e822fdab8c2cd7131deb8aa8a1, 5d77c36cd4b698649f5c30c5f6c084f4f61d1880, 9218dc26fd922b09858ecd3666ed57dfd8098da8 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: jfs: nlink overflow in jfs_rename If nlink is maximal for a directory (-1) and inside that directory you perform a rename for some child directory (not moving from the parent), then the nlink of the first directory is first incremented and later decremented. Normally this is fine, but when nlink = -1 this causes a wrap around to 0, and then drop_nlink issues a warning. After applying the patch syzbot no longer issues any warnings. I also ran some basic fs tests to look for any regressions.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 6, 2026
Updated
Oct 14, 2026
EPSS
0.3% · 25th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CNA vs NVD score

NVD
5.5
CNA · Linux
7.5
2.0 point gap

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-71292

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel2.6.12.1 and later · before 5.10.252
  • linux linux kernel5.11 and later · before 5.15.202
  • linux linux kernel5.16 and later · before 6.1.165
  • linux linux kernel6.2 and later · before 6.6.128
  • linux linux kernel6.7 and later · before 6.12.75
  • linux linux kernel6.13 and later · before 6.18.16
  • linux linux kernel6.19 and later · before 6.19.6
  • linux linux kernel2.6.12

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 2108829a59f081e822fdab8c2cd7131deb8aa8a1affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b4330a0d0947fbdc9d445cbbeabd8cc910a8c9caaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before a3d66089e50a6e0142f8884471f74292102ea9aaaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before f70fcbc2ac7c24f087a2c895c5753aa730b1e479affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 5d77c36cd4b698649f5c30c5f6c084f4f61d1880affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before fe136426e30ca6debcf916fd6a141555ed9fde74affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 93c325746ae59709b4f9bad4e3e4761c8d566c70affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 9218dc26fd922b09858ecd3666ed57dfd8098da8affected · 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 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.6-16.19.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-71290May 6, 2026 · misc: ti_fpc202: fix a potential memory leak in probe function
    22Monitor
  • ← EarlierCVE-2025-71291May 6, 2026 · misc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read()
    22Monitor
  • Later →CVE-2025-71293May 6, 2026 · drm/amdgpu/ras: Move ras data alloc before bad page check
    22Monitor

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 Linux2108829a59f081e822fdab8c2cd7131deb8aa8a1Vendor (CNA)
Linux Linux5d77c36cd4b698649f5c30c5f6c084f4f61d1880Vendor (CNA)
Linux Linux9218dc26fd922b09858ecd3666ed57dfd8098da8Vendor (CNA)
Linux Linux93c325746ae59709b4f9bad4e3e4761c8d566c70Vendor (CNA)
Linux Linuxa3d66089e50a6e0142f8884471f74292102ea9aaVendor (CNA)
Linux Linuxb4330a0d0947fbdc9d445cbbeabd8cc910a8c9caVendor (CNA)
Linux Linuxf70fcbc2ac7c24f087a2c895c5753aa730b1e479Vendor (CNA)
Linux Linuxfe136426e30ca6debcf916fd6a141555ed9fde74Vendor (CNA)
debian:linux6.1.170-1 · 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.

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

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 (7 more)

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

All records