CVE-2026-23388
Out-of-Bounds Read in Linux Kernel Squashfs Metadata Handling
Publication date: 2026-03-25
Last updated on: 2026-04-24
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | 2.6.29 |
| linux | linux_kernel | From 6.19 (inc) to 6.19.7 (exc) |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | From 6.13 (inc) to 6.18.17 (exc) |
| linux | linux_kernel | From 6.2 (inc) to 6.6.130 (exc) |
| linux | linux_kernel | From 6.7 (inc) to 6.12.77 (exc) |
| linux | linux_kernel | From 5.11 (inc) to 5.15.203 (exc) |
| linux | linux_kernel | From 5.16 (inc) to 6.1.167 (exc) |
| linux | linux_kernel | From 2.6.29.1 (inc) to 5.10.253 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-125 | The product reads data past the end, or before the beginning, of the intended buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the Linux kernel's Squashfs filesystem implementation. It is caused by a corrupted index look-up table that produces a negative metadata block offset. This negative offset is then passed to the function squashfs_copy_data via squashfs_read_metadata, leading to an out-of-bounds memory access. The issue results in a general protection fault, which can cause system instability or crashes. The vulnerability has been fixed by adding a check in squashfs_read_metadata to ensure the offset is within a valid range.
How can this vulnerability impact me? :
This vulnerability can lead to a general protection fault in the Linux kernel, causing crashes or instability in systems using the Squashfs filesystem. An attacker might exploit this to cause denial of service by triggering out-of-bounds memory access, potentially disrupting system operations.