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CVE-2025-38652· NVD / CVE Program· CNA Linux

f2fs: fix to avoid out-of-boundary access in devs.path

Noroxi assessment

Priority: Monitor (action score 28/100)

  • 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: 0.17% (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 1b1efa5f0e878745e94a98022e8edc675a87d78e, 1cf1ff15f262e8baf12201b270b6a79f9d119b2d, 345fc8d1838f3f8be7c8ed08d86a13dedef67136; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1.

Low priority for now. Upgrade to Linux Linux 1b1efa5f0e878745e94a98022e8edc675a87d78e, 1cf1ff15f262e8baf12201b270b6a79f9d119b2d, 345fc8d1838f3f8be7c8ed08d86a13dedef67136; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1 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 out-of-boundary access in devs.path - touch /mnt/f2fs/012345678901234567890123456789012345678901234567890123 - truncate -s $((1024*1024*1024)) \ /mnt/f2fs/012345678901234567890123456789012345678901234567890123 - touch /mnt/f2fs/file - truncate -s $((1024*1024*1024)) /mnt/f2fs/file - mkfs.f2fs /mnt/f2fs/012345678901234567890123456789012345678901234567890123 \ -c /mnt/f2fs/file - mount /mnt/f2fs/012345678901234567890123456789012345678901234567890123 \ /mnt/f2fs/loop [16937.192225] F2FS-fs (loop0): Mount Device [ 0]: /mnt/f2fs/012345678901234567890123456789012345678901234567890123\xff\x01, 511, 0 - 3ffff [16937.192268] F2FS-fs (loop0): Failed to find devices If device path length equals to MAX_PATH_LEN, sbi->devs.path[] may not end up w/ null character due to path array is fully filled, So accidently, fields locate after path[] may be treated as part of device path, result in parsing wrong device path. struct f2fs_dev_info { ... char path[MAX_PATH_LEN]; ... }; Let's add one byte space for sbi->devs.path[] to store null character of device path string.

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
Aug 22, 2025
Updated
Aug 5, 2026
EPSS
0.1% · 6th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
7.1
CNA · Linux
7.3
0.2 point gap

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

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

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

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • 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
debiandebian linux

Affected versions

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

  • debian debian linux11.0
  • linux linux kernel5.5 and later · before 5.10.241
  • linux linux kernel5.11 and later · before 5.15.190
  • linux linux kernel5.16 and later · before 6.1.148
  • linux linux kernel4.10 and later · before 5.4.297
  • linux linux kernel6.7 and later · before 6.12.42
  • linux linux kernel6.13 and later · before 6.15.10
  • linux linux kernel6.16 and later · before 6.16.1
  • linux linux kernel6.2 and later · before 6.6.102

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

    • 4.10affected
    • 3c62be17d4f562f43fe1d03b48194399caa35aa5 and later · before dc0172c74bd9edaee7bea2ebb35f3dbd37a8ae80affected · git
    • 3c62be17d4f562f43fe1d03b48194399caa35aa5 and later · before 1cf1ff15f262e8baf12201b270b6a79f9d119b2daffected · git
    • 3c62be17d4f562f43fe1d03b48194399caa35aa5 and later · before 666b7cf6ac9aa074b8319a2b68cba7f2c30023f0affected · git
    • 3c62be17d4f562f43fe1d03b48194399caa35aa5 and later · before 3466721f06edff834f99d9f49f23eabc6b2cb78eaffected · git
    • 3c62be17d4f562f43fe1d03b48194399caa35aa5 and later · before 345fc8d1838f3f8be7c8ed08d86a13dedef67136affected · git
    • 3c62be17d4f562f43fe1d03b48194399caa35aa5 and later · before 70849d33130a2cf1d6010069ed200669c8651fbdaffected · git
    • 3c62be17d4f562f43fe1d03b48194399caa35aa5 and later · before 755427093e4294ac111c3f9e40d53f681a0fbdaaaffected · git
    • 3c62be17d4f562f43fe1d03b48194399caa35aa5 and later · before 1b1efa5f0e878745e94a98022e8edc675a87d78eaffected · git
    • 3c62be17d4f562f43fe1d03b48194399caa35aa5 and later · before 5661998536af52848cc4d52a377e90368196edeaaffected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.148-16.1.148-1
Debian:13linuxbefore 6.12.43-16.12.43-1
Debian:14linuxbefore 6.16.3-16.16.3-1
openSUSE:Tumbleweedkernel-sourcebefore 6.16.5-1.16.16.5-1.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-38650Aug 22, 2025 · hfsplus: remove mutex_lock check in hfsplus_free_extents
    22Monitor
  • ← EarlierCVE-2025-38651Aug 22, 2025 · landlock: Fix warning from KUnit tests
    22Monitor
  • Later →CVE-2025-38654Aug 22, 2025 · pinctrl: canaan: k230: Fix order of DT parse and pinctrl register
    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 Linux1b1efa5f0e878745e94a98022e8edc675a87d78eVendor (CNA)
Linux Linux1cf1ff15f262e8baf12201b270b6a79f9d119b2dVendor (CNA)
Linux Linux345fc8d1838f3f8be7c8ed08d86a13dedef67136Vendor (CNA)
Linux Linux3466721f06edff834f99d9f49f23eabc6b2cb78eVendor (CNA)
Linux Linux5661998536af52848cc4d52a377e90368196edeaVendor (CNA)
Linux Linux666b7cf6ac9aa074b8319a2b68cba7f2c30023f0Vendor (CNA)
Linux Linux70849d33130a2cf1d6010069ed200669c8651fbdVendor (CNA)
Linux Linux755427093e4294ac111c3f9e40d53f681a0fbdaaVendor (CNA)
Linux Linuxdc0172c74bd9edaee7bea2ebb35f3dbd37a8ae80Vendor (CNA)
azl3 kernel 6.6.96.2-2 on Azure Linux 3.06.6.104.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.148-1 · Debian:12Package registry (OSV)
opensuse:kernel-source6.16.5-1.1 · openSUSE:TumbleweedPackage 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

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
high · data can be read
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
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (10 more)

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

All records