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Review reviewHigh

CVE-2025-37785

Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

In the Linux kernel, the following vulnerability has been resolved: ext4: fix OOB read when checking dotdot dir Mounting a corrupted filesystem with directory which contains '.' dir entry with rec_len == block size results in out-of-bounds read (later on, when the corrupted directory is removed). ext4_empty_dir() assumes every ext4 directory contains at least '.' and '..' as directory entries in the first data block. It first loads the '.' dir entry, performs sanity checks by calling ext4_check_dir_entry() and then uses its rec_len member to compute the location of '..' dir entry (in ext4_n...

CVSS
7.1
EPSS
0.28%
20.2% percentile
CISA KEV
Not listed
Published
2025.04.18
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.28%
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ext4: fix OOB read when checking dotdot dir Mounting a corrupted filesystem with directory which contains '.' dir entry with rec_len == block size results in out-of-bounds read (later on, when the corrupted directory is removed). ext4_empty_dir() assumes every ext4 directory contains at least '.' and '..' as directory entries in the first data block. It first loads the '.' dir entry, performs sanity checks by calling ext4_check_dir_entry() and then uses its rec_len member to compute the location of '..' dir entry (in ext4_n...

Affected product and versions

Product
Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
Affected versions
>= ac27a0ec112a089f1a5102bc8dffc79c8c815571 < 14da7dbecb430e35b5889da8dae7bef33173b351, >= ac27a0ec112a089f1a5102bc8dffc79c8c815571 < e47f472a664d70a3d104a6c2a035cdff55a719b4, >= ac27a0ec112a089f1a5102bc8dffc79c8c815571 < b7531a4f99c3887439d778afaf418d1a01a5f01b, >= ac27a0ec112a089f1a5102bc8dffc79c8c815571 < 89503e5eae64637d0fa2218912b54660effe7d93, >= ac27a0ec112a089f1a5102bc8dffc79c8c815571 < 52a5509ab19a5d3afe301165d9b5787bba34d842, >= ac27a0ec112a089f1a5102bc8dffc79c8c815571 < b47584c556444cf7acb66b26a62cbc348eb92b78, >= ac27a0ec112a089f1a5102bc8dffc79c8c815571 < ac28c5684c1cdab650a7e5065b19e91577d37a4b, >= ac27a0ec112a089f1a5102bc8dffc79c8c815571 < 53bc45da8d8da92ec07877f5922b130562eb4b00, >= ac27a0ec112a089f1a5102bc8dffc79c8c815571 < d5e206778e96e8667d3bde695ad372c296dc9353, >= 2.6.19, >= V3.1.6, >= 2.6.19 < 5.10.236, >= 5.11 < 5.15.180, >= 5.16 < 6.1.134, >= 6.2 < 6.6.87, >= 6.7 < 6.12.23, >= 6.13 < 6.13.11, >= 6.14 < 6.14.2
Fixed versions
5.10.236, 5.15.180, 6.1.134, 6.6.87, 6.12.23, 6.13.11, 6.14.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 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:L/UI:N/S:U/C:H/I:N/A:H
CWE
CWE-125