Out-of-bounds read via unchecked decompression table index
Published Aug 28, 2026 · Updated Aug 28, 2026
Out-of-bounds read in Linux kernel ntfs3 allows local users to trigger memory access past a table via corrupted compressed NTFS data. In decompress_chunk within fs/ntfs3/lznt.c, the index-correction loop increments its index and reads s_max_off without first enforcing the array bound. The path requires ntfs3 to process invalid LZNT-compressed data from a crafted filesystem image; published material establishes a kernel memory fault but not code execution.
Summary
What happened
Out-of-bounds read in Linux kernel ntfs3 allows local users to trigger memory access past a table via corrupted compressed NTFS data. In decompress_chunk within fs/ntfs3/lznt.c, the index-correction loop increments its index and reads s_max_off without first enforcing the array bound. The path requires ntfs3 to process invalid LZNT-compressed data from a crafted filesystem image; published material establishes a kernel memory fault but not code execution.
The record
- CVE
- CVE-2026-80598
- Published
- Aug 28, 2026
- Updated
- Aug 28, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Aug 28, 2026CVE publishedPublication date reported by the CVE source.
- Aug 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <5.15.212
- Affected versionversion=0 <6.1.178
- Affected versionversion=0 <6.12.97
- Affected versionversion=0 <6.18.40
- Affected versionversion=0 <6.6.145
- Affected versionversion=0 <7.1.5
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1113fa5b01a47a1a4cdbb9c695197ca6215f02a8
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <61415ffa365d2eca6986914afd0d1412444aa1dd
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7160a57192fb16d7a6fa9b7f5c7ac341d2444a89
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a93980141253c932aa6ae5d4422d90e0162dc774
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bd77afca2ae9b6d44d37902e3ad672ebb028b070
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c694f8ea2611e7413b3f04ee47e04a9b7b45817b
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ff05a98150ebb2b03919a9c05c576681e86abbb7
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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