CVE-2022-50082

Kernel warning via unlocked ext4 bmap path

Published Jun 18, 2025 · Updated May 11, 2026

Race condition in ext4 in Linux kernel 5.7 allows local users to trigger a kernel warning through concurrent bmap and write operations. The ext4_bmap path calls ext4_iomap_begin without holding the inode lock, while a concurrent write can create inline data and set EXT4_INODE_INLINE_DATA before the warning check. A local user needs access to the same ext4 inode and must win the race; the documented outcome is a WARN_ON_ONCE kernel warning.

CVSS severity7.0
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in ext4 in Linux kernel 5.7 allows local users to trigger a kernel warning through concurrent bmap and write operations. The ext4_bmap path calls ext4_iomap_begin without holding the inode lock, while a concurrent write can create inline data and set EXT4_INODE_INLINE_DATA before the warning check. A local user needs access to the same ext4 inode and must win the race; the documented outcome is a WARN_ON_ONCE kernel warning.

The record

CVE
CVE-2022-50082
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.7
  2. Affected versionversion=ac58e4fb03f9d111d733a4ad379d06eef3a24705 <30dfb75e1f8645404a536c74d468d498adcd4e74
  3. Affected versionversion=ac58e4fb03f9d111d733a4ad379d06eef3a24705 <51ae846cff568c8c29921b1b28eb2dfbcd4ac12d
  4. Affected versionversion=ac58e4fb03f9d111d733a4ad379d06eef3a24705 <a9fe6d1e3d343d7309f501b1f48020ce7127221f
  5. Affected versionversion=ac58e4fb03f9d111d733a4ad379d06eef3a24705 <e1682c7171a6c0ff576fe8116b8cba5b8f538b94
  6. Affected versionversion=ac58e4fb03f9d111d733a4ad379d06eef3a24705 <fa6482f374fda29a71ad44d76d35b4842d43cda4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=ac58e4fb03f9d111d733a4ad379d06eef3a24705 <30dfb75e1f8645404a536c74d468d498adcd4e74; version=ac58e4fb03f9d111d733a4ad379d06eef3a24705 <51ae846cff568c8c29921b1b28eb2dfbcd4ac12d; version=ac58e4fb03f9d111d733a4ad379d06eef3a24705 <a9fe6d1e3d343d7309f501b1f48020ce7127221f; version=ac58e4fb03f9d111d733a4ad379d06eef3a24705 <e1682c7171a6c0ff576fe8116b8cba5b8f538b94; version=ac58e4fb03f9d111d733a4ad379d06eef3a24705 <fa6482f374fda29a71ad44d76d35b4842d43cda4

Published CVSS scores

7.0NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Amazon LinuxCVSS: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

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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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