CVE-2022-50273

Kernel panic via unchecked recovery block address

Published Sep 15, 2025 · Updated Sep 15, 2025

Improper validation in Linux F2FS allows local users to trigger a kernel panic by mounting a crafted filesystem image. During fsync-data recovery, do_recover_data accepts a destination block address whose SIT allocation state conflicts with the inode mapping, then calls f2fs_replace_block and updates the inconsistent SIT bitmap. A local user must be able to supply and mount the malformed image; kernels built with CONFIG_F2FS_CHECK_FS panic, while other builds emit a warning during recovery.

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

What happened

Improper validation in Linux F2FS allows local users to trigger a kernel panic by mounting a crafted filesystem image. During fsync-data recovery, do_recover_data accepts a destination block address whose SIT allocation state conflicts with the inode mapping, then calls f2fs_replace_block and updates the inconsistent SIT bitmap. A local user must be able to supply and mount the malformed image; kernels built with CONFIG_F2FS_CHECK_FS panic, while other builds emit a warning during recovery.

The record

CVE
CVE-2022-50273
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0ef4ca04a3f9223ff8bc440041c524b2123e09a3
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3a4d24d746866dd45d970bd565ff3886e839366a
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <68b1e607559d3dc85f94b0d738d7c4e8029b0cfa
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73fb4bd2c055a393816f078f158cdd3025006f1d
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8f0a47def4722c5fd8d6b9268b5ffed8a249e2db
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ed854f10e6afd5cbd5c3274d4c4df4bfe0ab4362

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0ef4ca04a3f9223ff8bc440041c524b2123e09a3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3a4d24d746866dd45d970bd565ff3886e839366a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <68b1e607559d3dc85f94b0d738d7c4e8029b0cfa; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73fb4bd2c055a393816f078f158cdd3025006f1d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8f0a47def4722c5fd8d6b9268b5ffed8a249e2db; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ed854f10e6afd5cbd5c3274d4c4df4bfe0ab4362

Published CVSS scores

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

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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

T1499Endpoint Denial of Service

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

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Your stack

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