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NVD / CVE Program· CNA Linux

CVE-2022-49425: f2fs: fix dereference of stale list iterator after loop body

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: 0.27% (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 2aaf51dd39afb6d01d13f1e6fe20b684733b37d5, 385edd3ce5b4b1e9d31f474a5e35a39779ec1110, 45b2b7d7108ae1e25a5036cab04ab9273e792332.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 2aaf51dd39afb6d01d13f1e6fe20b684733b37d5, 385edd3ce5b4b1e9d31f474a5e35a39779ec1110, 45b2b7d7108ae1e25a5036cab04ab9273e792332 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 dereference of stale list iterator after loop body The list iterator variable will be a bogus pointer if no break was hit. Dereferencing it (cur->page in this case) could load an out-of-bounds/undefined value making it unsafe to use that in the comparision to determine if the specific element was found. Since 'cur->page' *can* be out-ouf-bounds it cannot be guaranteed that by chance (or intention of an attacker) it matches the value of 'page' even though the correct element was not found. This is fixed by using a separate list iterator variable for the loop and only setting the original variable if a suitable element was found. Then determing if the element was found is simply checking if the variable is set.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 26, 2025
Updated
Aug 5, 2026
EPSS
0.2% · 20th percentile

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%

CNA vs NVD score

NVD
5.5
CNA · Linux
7.8
2.3 point gap

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-2022-49425

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 kernel4.12 and later · before 4.19.247
  • linux linux kernel4.20 and later · before 5.4.198
  • linux linux kernel5.5 and later · before 5.10.121
  • linux linux kernel5.11 and later · before 5.15.46
  • linux linux kernel5.16 and later · before 5.17.14
  • linux linux kernel5.18 and later · before 5.18.3

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

    • 4.12affected
    • 8c242db9b8c01b252290e23827163787f07e01d1 and later · before 385edd3ce5b4b1e9d31f474a5e35a39779ec1110affected · git
    • 8c242db9b8c01b252290e23827163787f07e01d1 and later · before 5e47a7add3dda7f236548c5ec3017776dc2a729faffected · git
    • 8c242db9b8c01b252290e23827163787f07e01d1 and later · before 51d584704d18e60fa473823654f35611c777b291affected · git
    • 8c242db9b8c01b252290e23827163787f07e01d1 and later · before 45b2b7d7108ae1e25a5036cab04ab9273e792332affected · git
    • 8c242db9b8c01b252290e23827163787f07e01d1 and later · before b26e1c777890e4b938136deb8ec07a29f33862e4affected · git
    • 8c242db9b8c01b252290e23827163787f07e01d1 and later · before ed7efc472c00986dcd6903ab6ed165c7fa167674affected · git
    • 8c242db9b8c01b252290e23827163787f07e01d1 and later · before 2aaf51dd39afb6d01d13f1e6fe20b684733b37d5affected · git
    • before 4.12not affected · semver
    • 4.19.247 and later · up to and including 4.19.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.5-15.18.5-1

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-2022-49423Feb 26, 2025 · rtla: Avoid record NULL pointer dereference
    22Monitor
  • ← EarlierCVE-2022-49424Feb 26, 2025 · iommu/mediatek: Fix NULL pointer dereference when printing dev_name
    22Monitor
  • Later →CVE-2022-49426Feb 26, 2025 · iommu/arm-smmu-v3-sva: Fix mm use-after-free
    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 Linux2aaf51dd39afb6d01d13f1e6fe20b684733b37d5Vendor (CNA)
Linux Linux385edd3ce5b4b1e9d31f474a5e35a39779ec1110Vendor (CNA)
Linux Linux45b2b7d7108ae1e25a5036cab04ab9273e792332Vendor (CNA)
Linux Linux51d584704d18e60fa473823654f35611c777b291Vendor (CNA)
Linux Linux5e47a7add3dda7f236548c5ec3017776dc2a729fVendor (CNA)
Linux Linuxb26e1c777890e4b938136deb8ec07a29f33862e4Vendor (CNA)
Linux Linuxed7efc472c00986dcd6903ab6ed165c7fa167674Vendor (CNA)
debian:linux5.18.5-1 · 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)

CWE-476 · NULL Pointer Dereference

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 (6 more)

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

All records