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Linux Kernel CVE-2026-80646

| EUVDEUVD-2026-67522 HIGH
2026-08-28 Linux GHSA-px76-4wr3-jjw7
Information Disclosure Linux Red Hat Suse
7.5
CVSS 3.1 · Vendor: Linux
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Severity by source

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

Race condition requirement between stats query and device unregistration warrants AC:H; stats query is network-reachable without privileges (AV:N, PR:N); impact is availability-only kernel crash.

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

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

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

Lifecycle Timeline

5
Analysis Generated
Aug 29, 2026 - 07:44 vuln.today
CVSS changed
Aug 29, 2026 - 07:22 NVD
7.5 (HIGH)
Patch available
Aug 28, 2026 - 09:02 EUVD
CVE Published
Aug 28, 2026 - 06:48 cve.org
HIGH 7.5
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:

ipv6: guard against possible NULL deref in __in6_dev_stats_get()

dev_get_by_index_rcu() could return NULL if the original physical device is unregistered.

Found by Sashiko.

AnalysisAI

NULL pointer dereference in the Linux kernel IPv6 subsystem - specifically in __in6_dev_stats_get() - can crash the kernel and cause a denial of service when a physical network device is unregistered while IPv6 statistics are being collected. The vulnerability affects a wide range of stable kernel branches, from 4.19 through 7.x, and has been patched across all active LTS trees. …

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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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Persist
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Vulnerability AssessmentAI

Exploitation Exploitation requires two simultaneous conditions: (1) an IPv6 statistics request targeting a specific interface index is in-flight through `__in6_dev_stats_get()`, AND (2) the physical or virtual network device associated with that interface index is concurrently being unregistered from the kernel. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The NVD-assigned CVSS score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) reflects a network-accessible kernel crash, but AC:L is likely optimistic: reliable exploitation requires a race condition between a statistics query and a concurrent device unregistration event, which in practice implies AC:H. … 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 The primary fix is to upgrade to a patched Linux kernel version corresponding to the deployed stable branch: 4.19.291, 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, or 7.2. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify all systems running affected Linux kernel versions 4.19 through 7.x and categorize by business criticality. …

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Vendor StatusVendor

SUSE

Severity: Moderate
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-2026-80646 vulnerability details – vuln.today
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