CVE-2026-98934

kernel: kernel: Denial of Service via missing network context in IPv6 segment routing

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · October 23, 2026

Updated · October 30, 2026

Description

A flaw was found in the Linux kernel's IPv6 Segment Routing (SRv6) subsystem. This vulnerability can lead to a Denial of Service (DoS) when the kernel processes certain encapsulated packets—such as discovery traffic lacking socket or device associations—while segment routing flow labeling is enabled. Because the kernel fails to supply the required network context during packet flow dissection, handling such packets triggers kernel warnings and potential system instability.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-617 · Reachable Assertion