CVE-2026-68116: vxlan: mdb: Fix source list corruption on a failed replace

mediumCVSS 6.5CVE-2026-68116

CSIRTS triage

Memory corruption

What: A source list corruption issue in the Linux kernel vxlan module affects multicast database operations during failed replace operations.
Who is affected: Systems running Linux kernels with the affected vxlan mdb code.
Urgency: Medium severity (CVSS 6.5); memory corruption that could affect network reliability.
Action: Apply the latest stable or long-term support kernel update that includes the vxlan mdb fix.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.5
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68116

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-681160.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-68116	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for vxlan

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-74475: In the Linux kernel, the following vulnerability has been resolved: vxlan: use neigh_ha_snapsh…nvd · 2026-08-15
criticalCVE-2026-74474: In the Linux kernel, the following vulnerability has been resolved: vxlan: use pskb_network_ma…nvd · 2026-08-15
criticalCVE-2026-74473: In the Linux kernel, the following vulnerability has been resolved: vxlan: use pskb_network_ma…nvd · 2026-08-15
criticalCVE-2026-74406: In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix potential null-…nvd · 2026-08-15
highCVE-2026-68432: In the Linux kernel, the following vulnerability has been resolved: vxlan: require CAP_NET_ADM…nvd · 2026-08-12
highCVE-2026-68116: In the Linux kernel, the following vulnerability has been resolved: vxlan: mdb: Fix source lis…nvd · 2026-08-10