CVE-2026-63829: net: ip_gre: require CAP_NET_ADMIN in the device netns for changelink

highCVSS 8.2CVE-2026-63829

CSIRTS triage

vendor: Linux product: netOther

What: This vulnerability requires CAP_NET_ADMIN in the device netns for changelink operations.
Who is affected: Deployments using the net subsystem with changelink functionality.
Urgency: Remediation is advised to enhance security, with no current exploitation reported.
Action: Implement the CAP_NET_ADMIN requirement for changelink.

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

⚡ Watch net

Get an email when a new net advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8.2
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63829

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-2026-638290.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-63829	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-63829: In the Linux kernel, the following vulnerability has been resolved: net: ip_gre: require CAP_N…nvd

Recent advisories for net

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.

lowCVE-2026-10774: Zephyr's Bluetooth Mesh subnet key management leaks one PSA Crypto key slot on every subnet-ke…nvd · 2026-08-02
mediumCVE-2026-10773: The DHCPv4 client helper net_dhcpv4_msg_type_name() in subsys/net/lib/dhcpv4/dhcpv4.c indexes …nvd · 2026-08-01
medium[UPDATE] [medium] Golang Go-Module (Net, Image, Crypto): Multiple Vulnerabilitiescert-bund · 2026-07-31
highGHSA-6588-8gv4-xfgh: Microsoft Security Advisory CVE-2026-32203 – .NET and Visual Studio Denial of Service Vul…ghsa · 2026-07-28
unknownCVE-2026-64553: In the Linux kernel, the following vulnerability has been resolved: net: psample: fix info lea…nvd · 2026-07-27
highCVE-2026-64552: In the Linux kernel, the following vulnerability has been resolved: virtio-net: fix len check …nvd · 2026-07-27