CVE-2022-49169

Filesystem-operation hang via sleeping F2FS statistics lock

Published Feb 26, 2025 · Updated Aug 12, 2026

Denial of service in Linux kernel F2FS allows local users to hang status reads and filesystem unmounts through concurrent debugfs access. The fs/f2fs/debug.c stat_show, f2fs_build_stats, and f2fs_destroy_stats paths share a sleeping global mutex that can leave competing operations waiting indefinitely. Low-privileged local access and a mounted F2FS filesystem with debugfs statistics are required; affected operations can remain stuck in uninterruptible sleep.

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

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in Linux kernel F2FS allows local users to hang status reads and filesystem unmounts through concurrent debugfs access. The fs/f2fs/debug.c stat_show, f2fs_build_stats, and f2fs_destroy_stats paths share a sleeping global mutex that can leave competing operations waiting indefinitely. Low-privileged local access and a mounted F2FS filesystem with debugfs statistics are required; affected operations can remain stuck in uninterruptible sleep.

The record

CVE
CVE-2022-49169
Published
Feb 26, 2025
Updated
Aug 12, 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 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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=66af62ce7588736ae65edfdb1c0df597775c4d21 <2eff60346e7ae1a24cd868b8fdcf58e946e7dde1
  3. Affected versionversion=66af62ce7588736ae65edfdb1c0df597775c4d21 <738886004bd2885ac2db0bc63b4874aa471ca87e
  4. Affected versionversion=66af62ce7588736ae65edfdb1c0df597775c4d21 <98237fcda4a24e67b0a4498c17d5aa4ad4537bc7
  5. Affected versionversion=66af62ce7588736ae65edfdb1c0df597775c4d21 <ec4187d45cc1c2d69fffeee5fa6aa4cb62477cfb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.8; version=66af62ce7588736ae65edfdb1c0df597775c4d21 <2eff60346e7ae1a24cd868b8fdcf58e946e7dde1; version=66af62ce7588736ae65edfdb1c0df597775c4d21 <738886004bd2885ac2db0bc63b4874aa471ca87e; version=66af62ce7588736ae65edfdb1c0df597775c4d21 <98237fcda4a24e67b0a4498c17d5aa4ad4537bc7; version=66af62ce7588736ae65edfdb1c0df597775c4d21 <ec4187d45cc1c2d69fffeee5fa6aa4cb62477cfb

Published CVSS scores

5.5NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo