Bug 2525383 (CVE-2026-80598)

Summary: CVE-2026-80598 kernel: ntfs3: fix out-of-bounds read in decompress_lznt
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the `ntfs3` component of the Linux kernel. This vulnerability occurs because the `decompress_lznt()` function, responsible for decompressing data, does not correctly check the boundaries of an array index. An attacker could exploit this by providing a corrupted NTFS3 image containing invalid compressed data. This could lead to an out-of-bounds read, potentially causing system instability or the disclosure of sensitive information.
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Description OSIDB Bzimport 2026-08-28 07:42:11 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ntfs3: fix out-of-bounds read in decompress_lznt

decompress_lznt() does not validate array index bounds before accessing
the decompression table. A corrupted NTFS3 image with invalid compressed
data can trigger an out-of-bounds read.

Add index bounds checking to prevent the OOB access.
Comment 1 gkamathe 2026-08-31 08:04:39 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082831-CVE-2026-80598-1575@gregkh/T