net: ipip: require CAP_NET_ADMIN in the device netns for changelink
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 5 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-862.
Summary
In the Linux kernel, the following vulnerability has been resolved: net: ipip: require CAP_NET_ADMIN in the device netns for changelink ipip_changelink() operates 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 ipip_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.266, 5.15.217, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-72053
- 2026-10-03 Alias added: GHSA-7x5h-h8j3-crrp
- 2026-10-16 CISA SSVC decision points changed
- 2026-10-20 Weakness changed · CISA ADP
- 2026-10-30 CVSS score changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/a7d2642a50282322bc33f34ee7305f2b793df494
- https://git.kernel.org/stable/c/068ad9b85f681755f751ebab82ae98146cec163d
- https://git.kernel.org/stable/c/91571643e554ae89a91942380d5f5361fb7060a2
- https://git.kernel.org/stable/c/983cc4aa7e6f633b34c3ee743771252d7afa9a90
- https://git.kernel.org/stable/c/26544021d5c49cc6ae8a968ccb5033e6363854a4
- https://git.kernel.org/stable/c/68cadc3698c7de88966d306d12ec9c6217da228a
- https://git.kernel.org/stable/c/d49edcc65e0a37cc9b386a94415c5d6670ca8b71
- https://git.kernel.org/stable/c/8211a26324667980a463c069469a818e71207e02
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Sources
- CVE-2026-72053 · CVE Program
- CVE-2026-72053 · NVD
- FIRST EPSS
- GHSA-7x5h-h8j3-crrp · GitHub Advisory Database · CC BY 4.0
- CVE-2026-72053 · Red Hat security data · CC BY 4.0
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