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Linux Kernel CVE-2026-80649

| EUVDEUVD-2026-67525 HIGH
2026-08-28 Linux GHSA-r237-xgfx-686p
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, low-privilege attacker required; ARM+SCMI hardware constraint not reflected in base metrics; no subsequent-system scope change expected from a driver-level OOB.

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
5.3 MEDIUM
AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H
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 - 07:45 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
HIGH 7.8
CVE Published
Aug 28, 2026 - 06:48 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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

firmware: arm_scmi: Fix OOB in scmi_power_name_get()

scmi_power_name_get() does not validate the domain number passed by the external caller, which may lead to an out-of-bounds access.

Fix this by returning "unknown" for invalid domains, like scmi_reset_name_get() does.

AnalysisAI

Out-of-bounds memory access in the Linux kernel's ARM SCMI firmware subsystem allows a local low-privileged attacker on ARM-based hardware to trigger kernel memory corruption via the scmi_power_name_get() function, which fails to validate the domain number supplied by external callers. Affected kernel versions span from the introduction commit 76a6550990e2 through multiple stable branches, with patches backported to LTS lines 5.15, 6.1, 6.6, 6.12, and 6.18. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires: (1) an ARM-based system - x86 and non-ARM platforms are entirely unaffected; (2) a Linux kernel version at or after commit 76a6550990e296a7acbb4d33201c9740be912a8c (kernel 4.17) and before the respective branch fix commit; (3) the ARM SCMI protocol driver compiled and loaded (CONFIG_ARM_SCMI_PROTOCOL enabled) with power domain support active, meaning the target system must have SCMI-capable firmware actively communicating with the kernel; (4) local shell access with at least low-privilege user rights (CVSS PR:L), sufficient to invoke the affected SCMI power domain name query path. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) models worst-case kernel OOB impact with full confidentiality, integrity, and availability compromise, but this score warrants scrutiny against other available signals. … 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 Linux kernel version: 7.2 or 7.1.5 for mainline/current stable, or for LTS branches: 6.18.40, 6.12.97, 6.6.145, 6.1.178, or 5.15.212. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all ARM-based Linux systems and identify deployments running vulnerable LTS kernel versions (5.15, 6.1, 6.6, 6.12, 6.18 prior to patched releases). …

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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-2026-80649 vulnerability details – vuln.today
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