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Linux Kernel CVE-2026-80593

| EUVDEUVD-2026-67469 HIGH
2026-08-28 Linux GHSA-38hv-9295-2cxw
Buffer Overflow Linux Red Hat Suse
High
Disputed · 8.4 Vendor: Linux
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Severity by source

Sources disagree (Low–High)
Vendor (Linux) PRIMARY
8.4 HIGH
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
6.9 MEDIUM

AC:H reflects the non-default malformed-BIOS prerequisite; I:L because OOB read without demonstrated write primitive; PR:N since trigger occurs at auto-loaded driver probe time.

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

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorVendor: Linux

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

Lifecycle Timeline

5
Analysis Generated
Aug 29, 2026 - 07:23 vuln.today
CVSS changed
Aug 29, 2026 - 07:22 NVD
8.4 (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 8.4

DescriptionCVE.org

In the Linux kernel, the following vulnerability has been resolved:

hwmon: (asus_atk0110) Check package count before accessing element

atk_ec_present() walks the management group package returned by the GGRP ACPI method and, for each sub-package, reads its first element:

id = &obj->package.elements[0]; if (id->type != ACPI_TYPE_INTEGER)

without checking that the sub-package is non-empty. ACPICA allocates the element array with exactly package.count entries, so for a sub-package with a zero count this reads past the allocation.

The sibling function atk_debugfs_ggrp_open() performs the same access but skips empty packages with a package.count check first. Add the same check to atk_ec_present() so a malformed firmware package cannot trigger an out-of-bounds read.

AnalysisAI

Out-of-bounds read in the Linux kernel's asus_atk0110 hardware monitoring driver allows a malformed ACPI GGRP firmware package to trigger kernel memory corruption. Systems running ASUS ATK0110-equipped hardware with a BIOS that returns zero-count sub-packages in its GGRP management group response are affected across a wide range of Long-Term Support and mainline kernel versions from 2.6.32 onward. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Exploit
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Vulnerability AssessmentAI

Exploitation Exploitation requires three concurrent conditions: (1) the target system must be physically equipped with an ASUS ATK0110 Super I/O chip (present on a subset of ASUS desktop, workstation, and server motherboards); (2) the system BIOS must issue a malformed ACPI GGRP response containing at least one sub-package with a zero element count - a firmware defect not present in well-formed ASUS firmware; and (3) the asus_atk0110 kernel module must be loaded, which occurs automatically during boot on matching hardware. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS of 8.4 with vector AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H overstates exploitability in practice. … 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 Upgrade to a patched stable kernel release: 5.10.261 or later, 5.15.212 or later, 6.1.178 or later, 6.6.145 or later, 6.12.97 or later, 6.18.40 or later, 7.1.5 or later, or 7.2 or later. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory your infrastructure to identify systems with ASUS ATK0110-equipped hardware by reviewing system DMI data and kernel module logs. …

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Same technique Buffer Overflow

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 16.0 Not-Affected

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CVE-2026-80593 vulnerability details – vuln.today
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