CVE-2026-23388

HighCVSS 7.1/10Last modified Nov 5, 2026

Description

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

Squashfs: check metadata block offset is within range

Syzkaller reports a "general protection fault in squashfs_copy_data"

This is ultimately caused by a corrupted index look-up table, which produces a negative metadata block offset.

This is subsequently passed to squashfs_copy_data (via squashfs_read_metadata) where the negative offset causes an out of bounds access.

The fix is to check that the offset is within range in squashfs_read_metadata. This will trap this and other cases.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Weakness enumeration

CWE-125

Affected software

VendorProductVersions
LinuxLinux>= f400e12656ab518be107febfe2315fb1eab5a342, < 60f679f643f3f36a8571ea585e4ce5d93ef952b5; >= f400e12656ab518be107febfe2315fb1eab5a342, < 3f68a9457a6190814377577374da75f872e0a013; >= f400e12656ab518be107febfe2315fb1eab5a342, < 0c8ab092aec3ac4294940054772d30b511b16713; >= f400e12656ab518be107febfe2315fb1eab5a342, < 6b847d65f5b0065e02080c61fad93d57d6686383; >= f400e12656ab518be107febfe2315fb1eab5a342, < 9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c; >= f400e12656ab518be107febfe2315fb1eab5a342, < 01ee0bcc29864b78249308e8b35042b09bbf5fe3; >= f400e12656ab518be107febfe2315fb1eab5a342, < 3b9499e7d677dd4366239a292238489a804936b2; >= f400e12656ab518be107febfe2315fb1eab5a342, < fdb24a820a5832ec4532273282cbd4f22c291a0d
LinuxLinux2.6.29
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystem< *

References

Timeline

Published
Mar 25, 2026
Last modified
Nov 5, 2026
NVD status
Modified

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CVE-2026-23388: High severity, CVSS 7.1 | Vulnix