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🛡️ CVE-2023-54132 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

erofs: stop parsing non-compact HEAD index if clusterofs is invalid

In the Linux kernel, the following vulnerability has been resolved:

erofs: stop parsing non-compact HEAD index if clusterofs is invalid

Syzbot generated a crafted image [1] with a non-compact HEAD index of

clusterofs 33024 while valid numbers should be 0 ~ lclustersize-1,

which causes the following unexpected behavior as below:

BUG: unable to handle page fault for address: fffff52101a3fff9

#PF: supervisor read access in kernel mode

#PF: error_code(0x0000) - not-present page

PGD 23ffed067 P4D 23ffed067 PUD 0

Oops: 0000 [#1] PREEMPT SMP KASAN

CPU: 1 PID: 4398 Comm: kworker/u5:1 Not tainted 6.3.0-rc6-syzkaller-g09a9639e56c0 #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023

Workqueue: erofs_worker z_erofs_decompressqueue_work

RIP: 0010:z_erofs_decompress_queue+0xb7e/0x2b40

...

Call Trace:

<TASK>

z_erofs_decompressqueue_work+0x99/0xe0

process_one_work+0x8f6/0x1170

worker_thread+0xa63/0x1210

kthread+0x270/0x300

ret_from_fork+0x1f/0x30

Note that normal images or images using compact indexes are not

impacted. Let's fix this now.

[1] https://lore.kernel.org/r/[email protected]

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: Required — someone has to click, open or visit something.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2023-54132 is recorded against 2 packages.

  • kernel (from 6.3.0 up to 6.3.2)
  • unknown

Timeline and source

Published on 24 December 2025 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2023-54132 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-12-24
Updated 2026-08-20
Modified 2026-08-12
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel 6.3.0 6.3.2
unknown — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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