Answer in brief
CVE-2026-23388 records a Unknown severity vulnerability in Squashfs: check metadata block offset is within range. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f400e12656ab518be107febfe2315fb1eab5a342 <60f679f643f3f36a8571ea585e4ce5d93ef952b5 || >=f400e12656ab518be107febfe2315fb1eab5a342 <3f68a9457a6190814377577374da75f872e0a013 || >=f400e12656ab518be107febfe2315fb1eab5a342 <0c8ab092aec3ac4294940054772d30b511b16713 || >=f400e12656ab518be107febfe2315fb1eab5a342 <6b847d65f5b0065e02080c61fad93d57d6686383 || >=f400e12656ab518be107febfe2315fb1eab5a342 <9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c || >=f400e12656ab518be107febfe2315fb1eab5a342 <01ee0bcc29864b78249308e8b35042b09bbf5fe3 || >=f400e12656ab518be107febfe2315fb1eab5a342 <3b9499e7d677dd4366239a292238489a804936b2 || >=f400e12656ab518be107febfe2315fb1eab5a342 <fdb24a820a5832ec4532273282cbd4f22c291a0d | 60f679f643f3f36a8571ea585e4ce5d93ef952b5, 3f68a9457a6190814377577374da75f872e0a013, 0c8ab092aec3ac4294940054772d30b511b16713, 6b847d65f5b0065e02080c61fad93d57d6686383, 9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c, 01ee0bcc29864b78249308e8b35042b09bbf5fe3, 3b9499e7d677dd4366239a292238489a804936b2, fdb24a820a5832ec4532273282cbd4f22c291a0d |
| Linux/Linuxgeneric | 2.6.29 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Mar 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.