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Linux Kernel CVE-2026-80598

| EUVDEUVD-2026-67474 HIGH
2026-08-28 Linux GHSA-3h3p-2268-63w8
Buffer Overflow Linux Red Hat Suse
7.8
CVSS 3.1 · Vendor: Linux
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Severity by source

Vendor (Linux) PRIMARY
7.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.8 HIGH

Local access with low privileges needed to mount a crafted image; kernel-context OOB read enables full memory disclosure and potential privilege escalation.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative
Red Hat
5.5 MEDIUM
qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Aug 29, 2026 - 07:25 vuln.today
CVSS changed
Aug 29, 2026 - 07:22 NVD
7.8 (HIGH)
Patch available
Aug 28, 2026 - 09:02 EUVD
CVE Published
Aug 28, 2026 - 06:48 cve.org
UNKNOWN (no severity yet)
CVE Published
Aug 28, 2026 - 06:48 cve.org
HIGH 7.8

DescriptionCVE.org

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.

AnalysisAI

Out-of-bounds read in the Linux kernel's ntfs3 LZNT decompression handler allows a local attacker with low privileges to trigger kernel memory access violations by mounting a specially crafted NTFS3 filesystem image. Affected stable branches span 5.15 through 7.x, with patched releases available across all branches. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Vulnerability AssessmentAI

Exploitation The ntfs3 kernel module must be present and loadable on the target system (it is included and auto-loaded by default in most modern Linux distributions). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 7.8 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) is internally consistent: local access with low privileges is required to mount a filesystem, and kernel-context exploitation carries full confidentiality, integrity, and availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Update to the appropriate patched stable kernel release: 5.15.212 for the 5.15 LTS branch, 6.1.178 for the 6.1 LTS branch, 6.6.145 for the 6.6 LTS branch, 6.12.97 for the 6.12 branch, 6.18.40 for the 6.18 branch, or 7.1.5 and 7.2 for the mainline 7.x series. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all Linux systems running kernel versions 5.15 through 7.x, particularly those configured with NTFS3 filesystem support, to establish remediation scope. …

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Same technique Buffer Overflow

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 16.0 Affected

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CVE-2026-80598 vulnerability details – vuln.today
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