CVE-2026-72052

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.0 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://git.kernel.org/stable/c/03d8843b143ebbbfaf48511922abc6e886575a61
https://git.kernel.org/stable/c/0caa9f348f8b5356900de77b0bb89a697c4aff20
https://git.kernel.org/stable/c/129f8939e5af683cec3a1a5edcb40a64636ad81e
https://git.kernel.org/stable/c/1d4d8ee002083ca4ead5353662bf8362428af57f
https://git.kernel.org/stable/c/220162c9fedbe992da70d70f50a10da4f45f914c
https://git.kernel.org/stable/c/c38c8b0db3c65b597e7ece317b6cb59de3d15e69
https://git.kernel.org/stable/c/e3724dedf57761c6de52f4d604ec74f66fd61611
https://git.kernel.org/stable/c/f00a50876d2818bd6dc86fa98b3ef360884c53c8

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:21

Updated : 2026-08-17 06:18

NVD link : CVE-2026-72052

Mitre link : CVE-2026-72052

CVE.ORG link : CVE-2026-72052

JSON object : View

Products Affected

No product.

CWE

No CWE.

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"versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/ipv6/ip6_gre.c"], "defaultStatus": "affected"}]}], "published": "2026-08-15T06:21:14.523", "references": [{"url": "https://git.kernel.org/stable/c/03d8843b143ebbbfaf48511922abc6e886575a61", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/0caa9f348f8b5356900de77b0bb89a697c4aff20", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": 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for changelink\n\nip6gre_changelink() and ip6erspan_changelink() operate on at most two\nnetns, dev_net(dev) and the tunnel link netns t->net. They differ once\nthe device is created in or moved to a netns other than the one the\nrequest runs in. The rtnl changelink path checks CAP_NET_ADMIN only\nagainst dev_net(dev), so a caller privileged there but not in t->net can\nrewrite a tunnel that lives in t->net.\n\nGate both ops on rtnl_dev_link_net_capable() at their top, before any\nattribute is parsed."}], "lastModified": "2026-08-17T06:18:03.330", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}