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Linux Kernel CVE-2026-80600

| EUVDEUVD-2026-67476 CRITICAL
2026-08-28 Linux GHSA-m5gp-6f33-45m5
Information Disclosure Linux Red Hat Suse
Critical
Disputed · 9.8 Vendor: Linux
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Severity by source

Sources disagree (Medium–Critical)
Vendor (Linux) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.1 HIGH

batman-adv is Layer-2 mesh so AV:A not AV:N; no auth needed on the mesh (PR:N); UAF most plausibly yields node crash (A:H) with possible info leak (C:L), code execution unconfirmed.

3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
4.0 AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
CRITICAL
qualitative
Red Hat
5.5 MEDIUM
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
Network
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 - 07:27 vuln.today
CVSS changed
Aug 29, 2026 - 07:22 NVD
9.8 (CRITICAL)
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
CRITICAL 9.8

DescriptionCVE.org

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

batman-adv: dat: acquire ARP hw source only after skb realloc

The pskb_may_pull() called by batadv_get_vid() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free.

AnalysisAI

Use-after-free in the Linux kernel's batman-adv (B.A.T.M.A.N. advanced) distributed ARP table (DAT) code lets an attacker on the same mesh corrupt kernel memory: batadv_get_vid() calls pskb_may_pull(), which can reallocate the skb buffer, leaving the previously-cached ARP hardware-source pointer dangling and later dereferenced. …

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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 Exploitation requires the target to be running the Linux kernel with the batman-adv module loaded and the Distributed ARP Table (DAT) feature in the ARP-handling path - this is not a default configuration for general-purpose servers or desktops. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The recorded CVSS 3.1 base score is 9.8 (AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:H), but this is the auto-generated, worst-case score typical of bulk Linux kernel CVEs and overstates real-world exposure. … 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 Vendor-released patch: upgrade to a fixed stable kernel - 6.18.40, 6.12.97, 6.6.145, 6.1.178, 5.15.212, or 5.10.261 (or later within each series), matching your running branch; commit-level fixes are published at git.kernel.org (e.g. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, conduct an inventory of systems running batman-adv and document mesh network topology, access controls, and critical dependencies. …

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Vendor StatusVendor

SUSE

Severity: Critical
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-2026-80600 vulnerability details – vuln.today
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