CVE-2022-49380

Kernel panic via corrupted F2FS validity counters

Published Feb 26, 2025 · Updated Aug 15, 2026

Denial of service in the Linux kernel's F2FS implementation allows local users to trigger a kernel panic through a crafted filesystem. When corrupted total-valid-block or total-valid-node counters reach zero, dec_valid_node_count() decrements them and invokes f2fs_bug_on() instead of flagging the filesystem for checking. Reachability requires local access to exercise inode removal or eviction on an affected F2FS mount; the documented consequence is a host-wide kernel panic.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel's F2FS implementation allows local users to trigger a kernel panic through a crafted filesystem. When corrupted total-valid-block or total-valid-node counters reach zero, dec_valid_node_count() decrements them and invokes f2fs_bug_on() instead of flagging the filesystem for checking. Reachability requires local access to exercise inode removal or eviction on an affected F2FS mount; the documented consequence is a host-wide kernel panic.

The record

CVE
CVE-2022-49380
Published
Feb 26, 2025
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.8
  2. Affected versionversion=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <2766ddaf45b69252bb8fe526b5b6e56904a9ae7a
  3. Affected versionversion=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <4d17e6fe9293d57081ffdc11e1cf313e25e8fd9e
  4. Affected versionversion=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <89d9a48d0cd30429463ea4e37ca83be6773ed5eb
  5. Affected versionversion=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <bce859358d3d5940aa858e40ceee70ee6e76130e
  6. Affected versionversion=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <ccffa99ae6a1f44797b57444c6a80382a42928fe
  7. Affected versionversion=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <f8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.8; version=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <2766ddaf45b69252bb8fe526b5b6e56904a9ae7a; version=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <4d17e6fe9293d57081ffdc11e1cf313e25e8fd9e; version=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <89d9a48d0cd30429463ea4e37ca83be6773ed5eb; version=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <bce859358d3d5940aa858e40ceee70ee6e76130e; version=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <ccffa99ae6a1f44797b57444c6a80382a42928fe; version=39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 <f8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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