CVE-2026-23388

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.

CVSS 3.1

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

EPSS

0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-25)

CWE

CWE-125

Published

2026-03-25

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/01ee0bcc29864b78249308e8b35042b09bbf5fe3
• https://git.kernel.org/stable/c/0c8ab092aec3ac4294940054772d30b511b16713
• https://git.kernel.org/stable/c/3b9499e7d677dd4366239a292238489a804936b2
• https://git.kernel.org/stable/c/3f68a9457a6190814377577374da75f872e0a013
• https://git.kernel.org/stable/c/60f679f643f3f36a8571ea585e4ce5d93ef952b5

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