CVE-2023-54158

Filesystem disruption via quota reservation accounting leak

Published Dec 24, 2025 · Updated Dec 24, 2025

Resource exhaustion in affected Linux kernel versions allows local users to disrupt btrfs operations through leaked quota reservations. The btrfs_insert_delayed_dir_index() optimization calls btrfs_block_rsv_release() without a qgroup_to_release output, zeroing the temporary subvolume reservation before btrfs_subvolume_release_metadata() can convert it. When qgroups are enabled and a permitted user performs mkdir followed by subvolume creation, repeated leakage consumes reserved metadata space and eventually blocks quota-governed filesystem work.

CVSS severity4.7
Medium
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 exhaustion in affected Linux kernel versions allows local users to disrupt btrfs operations through leaked quota reservations. The btrfs_insert_delayed_dir_index() optimization calls btrfs_block_rsv_release() without a qgroup_to_release output, zeroing the temporary subvolume reservation before btrfs_subvolume_release_metadata() can convert it. When qgroups are enabled and a permitted user performs mkdir followed by subvolume creation, repeated leakage consumes reserved metadata space and eventually blocks quota-governed filesystem work.

The record

CVE
CVE-2023-54158
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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 <04ff6bd0317735791ef3e443c7c89f3c0dda548d
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <148b16cd30b202999ec5b534e3e5d8ab4b766f21
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <15e877e5923ec6d6caa5e447dcc4b79a8ff7cc53
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1e05bf5e80bb1161b7294c9ce5292b26232ab853
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <478bd15f46b6e3aae78aac4f3788697f1546eea6
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d246331b78cbef86237f9c22389205bc9b4e1cc1
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f264be24146bee2d652010a18ae2517df5856261

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <04ff6bd0317735791ef3e443c7c89f3c0dda548d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <148b16cd30b202999ec5b534e3e5d8ab4b766f21; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <15e877e5923ec6d6caa5e447dcc4b79a8ff7cc53; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1e05bf5e80bb1161b7294c9ce5292b26232ab853; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <478bd15f46b6e3aae78aac4f3788697f1546eea6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d246331b78cbef86237f9c22389205bc9b4e1cc1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f264be24146bee2d652010a18ae2517df5856261

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/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

T1499.001OS Exhaustion Flood

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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