{"id":"CVE-2026-72055","title":"kernel: net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink (CVE-2026-72055)","summary":"A flaw was found in the Linux kernel's `ip6_vti` component, which handles IPv6 Virtual Tunnel Interfaces. A local attacker with certain network administration privileges in one isolated network environment (network namespace) could exploit…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","cvssSource":"vendor","cwe":"CWE-863","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9"],"published":"2026-08-15","updated":"2026-10-26","sourceUpdated":"2026-10-26T11:08:17+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72055.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72055.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-72055"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516421"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72055"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72055"},{"url":"https://kernelcve.org/list/?q=CVE-2026-72055"},{"url":"https://lore.kernel.org/linux-cve-announce/2026081516-CVE-2026-72055-41c4@gregkh/T"},{"url":"https://git.kernel.org/stable/c/f5254e7766b4ac02b66b2ccef896cd278503cb11"},{"url":"https://git.kernel.org/stable/c/ef897249dc957089e6f7f11ceea699e093ad51bd"},{"url":"https://git.kernel.org/stable/c/f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba"},{"url":"https://git.kernel.org/stable/c/c64b9ae7eb97e81d54b792910a3aeafd92566c79"},{"url":"https://git.kernel.org/stable/c/b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf"},{"url":"https://git.kernel.org/stable/c/0b2f9c908f930ec4be17d389723f9a202d6a883c"},{"url":"https://git.kernel.org/stable/c/f97e93ebf2f9b8ef3b87f7a9371255e84d151587"},{"url":"https://git.kernel.org/stable/c/e2ac3b242c37dff323a964962e43854f4b1a2b79"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00151,"epssPercentile":0.04207,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:51:02.327568Z"},"scores":{"vendor":6.1,"cna":8.8},"ingestedAt":"2026-10-16T17:24:46.874Z","slug":"CVE-2026-72055","body":"## Overview\n\nA flaw was found in the Linux kernel's `ip6_vti` component, which handles IPv6 Virtual Tunnel Interfaces. A local attacker with certain network administration privileges in one isolated network environment (network namespace) could exploit this vulnerability. This allows them to modify the configuration of a tunnel in a different isolated network environment where they do not have full administrative rights, potentially leading to unauthorized network changes or the redirection of network traffic.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72055.json)\n\n**kernel: net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink** — rated Moderate by Red Hat. Released 2026-08-15, updated 2026-10-26.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n\n## Remediation\n\nAffected\n\nWorkarounds / mitigations:\n\n- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":229300,"id":"CVE-2026-72055","ts":1793019670020,"field":"cvss","old":"8.8","new":"6.1"},{"seq":229299,"id":"CVE-2026-72055","ts":1793019670020,"field":"severity","old":"high","new":"medium"}]}