CVE-2026-23388

Squashfs: check metadata block offset is within range

State: Published
Severity: Not scored
Published: Mar 25, 2026
Updated: Oct 15, 2026
Reserved: Jan 13, 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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	f400e12656ab518be107febfe2315fb1eab5a342 to before 60f679f643f3f36a8571ea585e4ce5d93ef952b5Affected f400e12656ab518be107febfe2315fb1eab5a342 to before 3f68a9457a6190814377577374da75f872e0a013Affected f400e12656ab518be107febfe2315fb1eab5a342 to before 0c8ab092aec3ac4294940054772d30b511b16713Affected f400e12656ab518be107febfe2315fb1eab5a342 to before 6b847d65f5b0065e02080c61fad93d57d6686383Affected f400e12656ab518be107febfe2315fb1eab5a342 to before 9e9fa5ad37c9cbad73c165c7ff1e76e650825e7cAffected f400e12656ab518be107febfe2315fb1eab5a342 to before 01ee0bcc29864b78249308e8b35042b09bbf5fe3Affected f400e12656ab518be107febfe2315fb1eab5a342 to before 3b9499e7d677dd4366239a292238489a804936b2Affected f400e12656ab518be107febfe2315fb1eab5a342 to before fdb24a820a5832ec4532273282cbd4f22c291a0dAffected
LinuxLinux	2.6.29Affected before 2.6.29Not affected 5.10.253 through 5.10.Not affected 5.15.203 through 5.15.Not affected 6.1.167 through 6.1.Not affected 6.6.130 through 6.6.Not affected 6.12.77 through 6.12.Not affected 6.18.17 through 6.18.Not affected 6.19.7 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

f400e12656ab518be107febfe2315fb1eab5a342 to before 60f679f643f3f36a8571ea585e4ce5d93ef952b5Affected
f400e12656ab518be107febfe2315fb1eab5a342 to before 3f68a9457a6190814377577374da75f872e0a013Affected
f400e12656ab518be107febfe2315fb1eab5a342 to before 0c8ab092aec3ac4294940054772d30b511b16713Affected
f400e12656ab518be107febfe2315fb1eab5a342 to before 6b847d65f5b0065e02080c61fad93d57d6686383Affected
f400e12656ab518be107febfe2315fb1eab5a342 to before 9e9fa5ad37c9cbad73c165c7ff1e76e650825e7cAffected
f400e12656ab518be107febfe2315fb1eab5a342 to before 01ee0bcc29864b78249308e8b35042b09bbf5fe3Affected
f400e12656ab518be107febfe2315fb1eab5a342 to before 3b9499e7d677dd4366239a292238489a804936b2Affected
f400e12656ab518be107febfe2315fb1eab5a342 to before fdb24a820a5832ec4532273282cbd4f22c291a0dAffected

LinuxLinux

2.6.29Affected
before 2.6.29Not affected
5.10.253 through 5.10.*Not affected
5.15.203 through 5.15.*Not affected
6.1.167 through 6.1.*Not affected
6.6.130 through 6.6.*Not affected
6.12.77 through 6.12.*Not affected
6.18.17 through 6.18.*Not affected
6.19.7 through 6.19.*Not affected
7.0 and laterNot affected

References

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