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Review reviewHigh

CVE-2023-54132

Linux

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....

CVSS
7.8
EPSS
0.15%
4.71% percentile
CISA KEV
Not listed
Published
2025.12.24
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.15%
Technical severityCVSS 7.8

Vulnerability overview

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....

Affected product and versions

Product
Linux
Affected versions
>= 02827e1796b33f1794966f5c3101f8da2dfa9c1d < 880c79bdb002b9d5b6940e52c2ad3829c2178207, >= 02827e1796b33f1794966f5c3101f8da2dfa9c1d < 7a4579cd6e4936de107c82499c3c9ee11b63401e, >= 02827e1796b33f1794966f5c3101f8da2dfa9c1d < 060fecf1114ff9fcfe87953fe8c4fc5048777160, >= 02827e1796b33f1794966f5c3101f8da2dfa9c1d < 7ee7a86e28ce9ead7112286c388df8d254c373c6, >= 02827e1796b33f1794966f5c3101f8da2dfa9c1d < f01b2894928affa3339d355608713cf3db8360b8, >= 02827e1796b33f1794966f5c3101f8da2dfa9c1d < 96a845419b3722869f09883319de4d55c44d9aef, >= 02827e1796b33f1794966f5c3101f8da2dfa9c1d < cc4efd3dd2ac9f89143e5d881609747ecff04164, >= 4.19
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
Not available