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NVD / CVE Program· CNA Linux

CVE-2025-21660: ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked

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: 0.20% (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 13e41c58c74baa71f34c0830eaa3c29d53a6e964, 2ac538e40278a2c0c051cca81bcaafc547d61372, 51669f4af5f7959565b48e55691ba92fabf5c587.

Low priority for now. Upgrade to Linux Linux 13e41c58c74baa71f34c0830eaa3c29d53a6e964, 2ac538e40278a2c0c051cca81bcaafc547d61372, 51669f4af5f7959565b48e55691ba92fabf5c587 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: ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked When `ksmbd_vfs_kern_path_locked` met an error and it is not the last entry, it will exit without restoring changed path buffer. But later this buffer may be used as the filename for creation.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jan 21, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 10th 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 · 0.2%

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.

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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 kernel6.1.113 and later · before 6.1.125
  • linux linux kernel6.6.54 and later · before 6.6.72
  • linux linux kernel6.10.13 and later · before 6.11
  • linux linux kernel6.11.2 and later · before 6.12.10
  • linux linux kernel6.13

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

    • d205cb1a13b37b2660df70a972dedc8c4ba1c2e8, c1e27b70e79050530c671b9dab688386c86f039a, 6.12affected
    • d1b2d2a9c912fc7b788985fbaf944e80f4b3f2af and later · before 13e41c58c74baa71f34c0830eaa3c29d53a6e964affected · git
    • 6ab95e27b77730de3fa2d601db3764490c5eede2 and later · before 65b31b9d992c0fb0685c51a0cf09993832734fc4affected · git
    • c5a709f08d40b1a082e44ffcde1aea4d2822ddd5 and later · before 51669f4af5f7959565b48e55691ba92fabf5c587affected · git
    • c5a709f08d40b1a082e44ffcde1aea4d2822ddd5 and later · before 2ac538e40278a2c0c051cca81bcaafc547d61372affected · git
    • 6.1.113 and later · before 6.1.125affected · semver
    • 6.6.54 and later · before 6.6.72affected · semver
    • 6.10.13 and later · before 6.11affected · semver
    • 6.11.2 and later · before 6.12affected · semver
    • before 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 6.1.128-16.1.128-1
Debian:13linuxbefore 6.12.10-16.12.10-1

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-2025-21657Jan 21, 2025 · sched_ext: Replace rq_lock() to raw_spin_rq_lock() in scx_ops_bypass()
    22Monitor
  • ← EarlierCVE-2025-21659Jan 21, 2025 · netdev: prevent accessing NAPI instances from another namespace
    22Monitor
  • Later →CVE-2025-21661Jan 21, 2025 · gpio: virtuser: fix missing lookup table cleanups
    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 Linux13e41c58c74baa71f34c0830eaa3c29d53a6e964Vendor (CNA)
Linux Linux2ac538e40278a2c0c051cca81bcaafc547d61372Vendor (CNA)
Linux Linux51669f4af5f7959565b48e55691ba92fabf5c587Vendor (CNA)
Linux Linux6.1.125Vendor (CNA)
Linux Linux6.11Vendor (CNA)
Linux Linux6.12Vendor (CNA)
Linux Linux6.6.72Vendor (CNA)
Linux Linux65b31b9d992c0fb0685c51a0cf09993832734fc4Vendor (CNA)
debian:linux6.1.128-1 · 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).

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 (4 more)

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

All records