CVE-2026-23388

Summary

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.

Impact & exploitability

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

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/01ee0bcc29864b78249308e8b35042b09bbf5fe3 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/01ee0bcc29864b78249308e8b35042b09bbf5fe3Patch
• https://git.kernel.org/stable/c/0c8ab092aec3ac4294940054772d30b511b16713Patch
• https://git.kernel.org/stable/c/3b9499e7d677dd4366239a292238489a804936b2Patch
• https://git.kernel.org/stable/c/3f68a9457a6190814377577374da75f872e0a013Patch
• https://git.kernel.org/stable/c/60f679f643f3f36a8571ea585e4ce5d93ef952b5Patch
• https://git.kernel.org/stable/c/6b847d65f5b0065e02080c61fad93d57d6686383Patch
• https://git.kernel.org/stable/c/9e9fa5ad37c9cbad73c165c7ff1e76e650825e7cPatch
• https://git.kernel.org/stable/c/fdb24a820a5832ec4532273282cbd4f22c291a0dPatch