CVE-2022-50835

Buffer-head reference leak during fast-commit replay

Published Dec 30, 2025 · Updated Dec 30, 2025

Resource leakage in JBD2 in affected Linux kernels allows attackers to retain buffer-head references via unspecified vectors. In fs/jbd2/recovery.c, fc_do_one_pass() obtains a replay block buffer head but fails to call brelse() after the replay callback, leaking its reference. Reachability requires JBD2 fast-commit replay; published sources establish reference retention but do not document a crash, privilege gain, or data exposure.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leakage in JBD2 in affected Linux kernels allows attackers to retain buffer-head references via unspecified vectors. In fs/jbd2/recovery.c, fc_do_one_pass() obtains a replay block buffer head but fails to call brelse() after the replay callback, leaking its reference. Reachability requires JBD2 fast-commit replay; published sources establish reference retention but do not document a crash, privilege gain, or data exposure.

The record

CVE
CVE-2022-50835
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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 <1f48116cbd3404898c9022892e114dd7cc3063c1
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <27c7bd35135d5ab38b9138ecf186ce54a96c98d9
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <56fcd0788f0d9243c1754bd6f80b8b327c4afeee
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dfff66f30f66b9524b661f311bbed8ff3d2ca49f
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e65506ff181fc176088f32117d69b9cb1ddda777

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1f48116cbd3404898c9022892e114dd7cc3063c1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <27c7bd35135d5ab38b9138ecf186ce54a96c98d9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <56fcd0788f0d9243c1754bd6f80b8b327c4afeee; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dfff66f30f66b9524b661f311bbed8ff3d2ca49f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e65506ff181fc176088f32117d69b9cb1ddda777

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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