CVE-2026-72052
CVE-2026-72052: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.8
High [CVE-2026-72052] require CAP_NET_ADMIN in the device netns for changelink
CVE-2026-72052Source published Source updated
In the Linux kernel, the following vulnerability has been resolved: net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink ip6gre_changelink() and ip6erspan_changelink() operate on at most two netns, dev_net(dev) and the tunnel link netns t->net. They differ once the device is created in or moved to a netns other than the one the request runs in. The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a caller privileged there but not in t->net can rewrite a tunnel that lives in t->net. Gate both ops on rtnl_dev_link_net_capable() at their top, before any attribute is parsed. The `changelink` functions in these drivers do not adequately verify administrative capabilities (`CAP_NET_ADMIN`) across different network namespaces. This allows a local…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat package: kernel-rt
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- If IPv6 GRE or IP-ERSpan tunnels are not in use, their respective kernel modules (`ip6_gre` and `ip6erspan`) can be blacklisted to prevent exploitation. Create a file such as `/etc/modprobe.d/disable-ip6gre.conf` with the following content: ``` install ip6_gre /bin/true install ip6erspan /bin/true ``` After creating the file, regenerate the initramfs and reboot the system for the changes to take effect. This mitigation may impact network functionality if these tunnel types are actively used.
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