CVE-2022-50126

Kernel crash via unlocked journal-abort check

Published Jun 18, 2025 · Updated May 11, 2026

Reachable assertion in the Linux kernel allows local users to crash the kernel through concurrent ext4 unlink activity. The jbd2_journal_dirty_metadata function checks whether its handle is aborted before taking jh->b_state_lock, allowing a concurrent journal abort and buffer refile to leave b_frozen_data populated when the assertion runs. Exploitation requires low-privileged local access and a timing-sensitive ext4 journal-abort race; the reported consequence is a kernel BUG and service interruption.

CVSS severity5.5
Medium
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

Reachable assertion in the Linux kernel allows local users to crash the kernel through concurrent ext4 unlink activity. The jbd2_journal_dirty_metadata function checks whether its handle is aborted before taking jh->b_state_lock, allowing a concurrent journal abort and buffer refile to leave b_frozen_data populated when the assertion runs. Exploitation requires low-privileged local access and a timing-sensitive ext4 journal-abort race; the reported consequence is a kernel BUG and service interruption.

The record

CVE
CVE-2022-50126
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-617, T1499
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=2.6.19
  2. Affected versionversion=470decc613ab2048b619a01028072d932d9086ee <0f61c6dc4b714be9d79cf0782ca02ba01c1b7ac3
  3. Affected versionversion=470decc613ab2048b619a01028072d932d9086ee <4a734f0869f970b8a9b65062ea40b09a5da9dba8
  4. Affected versionversion=470decc613ab2048b619a01028072d932d9086ee <6073389db83b903678a0920554fa19f5bdc51c48
  5. Affected versionversion=470decc613ab2048b619a01028072d932d9086ee <731c1662d838fe954c6759e3ee43229b0d928fe4
  6. Affected versionversion=470decc613ab2048b619a01028072d932d9086ee <ddd896792e1718cb84c96f3e618270589b6886dc
  7. Affected versionversion=470decc613ab2048b619a01028072d932d9086ee <e62f79827784f56499a50ea2e893c98317b5407b
  8. Affected versionversion=470decc613ab2048b619a01028072d932d9086ee <f7161d0da975adc234161cd0641d0e484f5ce375
  9. Affected versionversion=470decc613ab2048b619a01028072d932d9086ee <fa5b65d39332fef7a11ae99cb1f0696012a61527

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.19; version=470decc613ab2048b619a01028072d932d9086ee <0f61c6dc4b714be9d79cf0782ca02ba01c1b7ac3; version=470decc613ab2048b619a01028072d932d9086ee <4a734f0869f970b8a9b65062ea40b09a5da9dba8; version=470decc613ab2048b619a01028072d932d9086ee <6073389db83b903678a0920554fa19f5bdc51c48; version=470decc613ab2048b619a01028072d932d9086ee <731c1662d838fe954c6759e3ee43229b0d928fe4; version=470decc613ab2048b619a01028072d932d9086ee <ddd896792e1718cb84c96f3e618270589b6886dc; version=470decc613ab2048b619a01028072d932d9086ee <e62f79827784f56499a50ea2e893c98317b5407b; version=470decc613ab2048b619a01028072d932d9086ee <f7161d0da975adc234161cd0641d0e484f5ce375; version=470decc613ab2048b619a01028072d932d9086ee <fa5b65d39332fef7a11ae99cb1f0696012a61527

Published CVSS scores

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

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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-617Reachable Assertion
T1499Endpoint Denial of Service

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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