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NVD / CVE Program· CNA Linux

CVE-2025-40150: f2fs: fix to avoid migrating empty section

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: 0.26% (FIRST EPSS).
  • Fixed version: Linux Linux 25d2dc669f2a7e48b335d1cb07139f2ffc9fe5df, 6.6.130, d625a2b08c089397d3a03bff13fa8645e4ec7a01.

Low priority for now. Upgrade to Linux Linux 25d2dc669f2a7e48b335d1cb07139f2ffc9fe5df, 6.6.130, d625a2b08c089397d3a03bff13fa8645e4ec7a01 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: f2fs: fix to avoid migrating empty section It reports a bug from device w/ zufs: F2FS-fs (dm-64): Inconsistent segment (173822) type [1, 0] in SSA and SIT F2FS-fs (dm-64): Stopped filesystem due to reason: 4 Thread A Thread B - f2fs_expand_inode_data - f2fs_allocate_pinning_section - f2fs_gc_range - do_garbage_collect w/ segno #x - writepage - f2fs_allocate_data_block - new_curseg - allocate segno #x The root cause is: fallocate on pinning file may race w/ block allocation as above, result in do_garbage_collect() from fallocate() may migrate segment which is just allocated by a log, the log will update segment type in its in-memory structure, however GC will get segment type from on-disk SSA block, once segment type changes by log, we can detect such inconsistency, then shutdown filesystem. In this case, on-disk SSA shows type of segno #173822 is 1 (SUM_TYPE_NODE), however segno #173822 was just allocated as data type segment, so in-memory SIT shows type of segno #173822 is 0 (SUM_TYPE_DATA). Change as below to fix this issue: - check whether current section is empty before gc - add sanity checks on do_garbage_collect() to avoid any race case, result in migrating segment used by log. - btw, it fixes misc issue in printed logs: "SSA and SIT" -> "SIT and SSA".

—No exploit Fix available
Published
Nov 12, 2025
Updated
Oct 19, 2026
EPSS
0.2% · 18th 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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Noroxi analysis

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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

    • 6.9affected
    • 40d76c393cca83938b11eb7ca8983aa3cd0ed69b and later · before db489778e6f2a4034c2cd26fadda2796eba24dcdaffected · git
    • 9703d69d9d153bb230711d0d577454552aeb13d4 and later · before 25d2dc669f2a7e48b335d1cb07139f2ffc9fe5dfaffected · git
    • 9703d69d9d153bb230711d0d577454552aeb13d4 and later · before eec1589be36fcf7440755703e4faeee2c01e360baffected · git
    • 9703d69d9d153bb230711d0d577454552aeb13d4 and later · before d625a2b08c089397d3a03bff13fa8645e4ec7a01affected · git
    • 6.6.33 and later · before 6.6.130affected · semver
    • before 6.9not affected · semver
    • 6.6.130 and later · up to and including 6.6.*not affected · semver
    • 6.12.78 and later · up to and including 6.12.*not affected · semver
    • 6.17.3 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 6.12.85-16.12.85-1
Debian:14linuxbefore 6.17.6-16.17.6-1

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-2025-40147Nov 12, 2025 · blk-throttle: fix access race during throttle policy activation
    0Monitor
  • ← EarlierCVE-2025-40148Nov 12, 2025 · drm/amd/display: Add NULL pointer checks in dc_stream cursor attribute functions
    0Monitor
  • Later →CVE-2025-40151Nov 12, 2025 · LoongArch: BPF: No support of struct argument in trampoline programs
    31Monitor

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 Linux25d2dc669f2a7e48b335d1cb07139f2ffc9fe5dfVendor (CNA)
Linux Linux6.6.130Vendor (CNA)
Linux Linuxd625a2b08c089397d3a03bff13fa8645e4ec7a01Vendor (CNA)
Linux Linuxdb489778e6f2a4034c2cd26fadda2796eba24dcdVendor (CNA)
Linux Linuxeec1589be36fcf7440755703e4faeee2c01e360bVendor (CNA)
debian:linux6.12.85-1 · Debian:13Package 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

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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✗ → ✓

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References

Show all references (3 more)

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

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