CVE-2026-23388

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-23388
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23388.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-23388
Downstream
Published
2026-03-25T10:28:06Z
Modified
2026-08-12T03:30:50Z
Summary
Squashfs: check metadata block offset is within range
Details

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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23388.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
f400e12656ab518be107febfe2315fb1eab5a342
Fixed
60f679f643f3f36a8571ea585e4ce5d93ef952b5
Fixed
3f68a9457a6190814377577374da75f872e0a013
Fixed
0c8ab092aec3ac4294940054772d30b511b16713
Fixed
6b847d65f5b0065e02080c61fad93d57d6686383
Fixed
9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c
Fixed
01ee0bcc29864b78249308e8b35042b09bbf5fe3
Fixed
3b9499e7d677dd4366239a292238489a804936b2
Fixed
fdb24a820a5832ec4532273282cbd4f22c291a0d

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23388.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.29
Fixed
5.10.253
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.203
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.167
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.130
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.77
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.17
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
6.19.7

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23388.json"