Kernel memory disclosure and crash via invalid inode
Published May 1, 2024 · Updated May 12, 2026
Out-of-bounds read in Linux Squashfs allows local users to disclose kernel memory or crash the system through a malformed filesystem. fill_meta_index() invalidates an incomplete metadata index by setting its inode number to zero, but locate_meta_index() later matches it to an unvalidated zero-numbered inode and reads beyond the unfilled index. Exploitation requires local low-privileged access and a crafted Squashfs inode that reaches the kernel parser; no integrity impact is reported.
Summary
What happened
Out-of-bounds read in Linux Squashfs allows local users to disclose kernel memory or crash the system through a malformed filesystem. fill_meta_index() invalidates an incomplete metadata index by setting its inode number to zero, but locate_meta_index() later matches it to an unvalidated zero-numbered inode and reads beyond the unfilled index. Exploitation requires local low-privileged access and a crafted Squashfs inode that reaches the kernel parser; no integrity impact is reported.
The record
- CVE
- CVE-2024-26982
- Published
- May 1, 2024
- Updated
- May 12, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- CWE-125
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 1, 2024CVE publishedPublication date reported by the CVE source.
- May 12, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=0 <*
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Attacks
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