CVE-2026-72053

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.

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/068ad9b85f681755f751ebab82ae98146cec163d
https://git.kernel.org/stable/c/26544021d5c49cc6ae8a968ccb5033e6363854a4
https://git.kernel.org/stable/c/68cadc3698c7de88966d306d12ec9c6217da228a
https://git.kernel.org/stable/c/8211a26324667980a463c069469a818e71207e02
https://git.kernel.org/stable/c/91571643e554ae89a91942380d5f5361fb7060a2
https://git.kernel.org/stable/c/983cc4aa7e6f633b34c3ee743771252d7afa9a90
https://git.kernel.org/stable/c/a7d2642a50282322bc33f34ee7305f2b793df494
https://git.kernel.org/stable/c/d49edcc65e0a37cc9b386a94415c5d6670ca8b71

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:21

Updated : 2026-08-23 13:16

NVD link : CVE-2026-72053

Mitre link : CVE-2026-72053

CVE.ORG link : CVE-2026-72053

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-72053", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.0}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6c742e714d8c282fd8f8b22d3e20b5141738c1ee", "lessThan": "a7d2642a50282322bc33f34ee7305f2b793df494", "versionType": "git"}, {"status": "affected", "version": "6c742e714d8c282fd8f8b22d3e20b5141738c1ee", "lessThan": "068ad9b85f681755f751ebab82ae98146cec163d", "versionType": "git"}, {"status": "affected", "version": "6c742e714d8c282fd8f8b22d3e20b5141738c1ee", "lessThan": "91571643e554ae89a91942380d5f5361fb7060a2", "versionType": "git"}, {"status": "affected", "version": "6c742e714d8c282fd8f8b22d3e20b5141738c1ee", "lessThan": "983cc4aa7e6f633b34c3ee743771252d7afa9a90", "versionType": "git"}, {"status": "affected", "version": "6c742e714d8c282fd8f8b22d3e20b5141738c1ee", "lessThan": "26544021d5c49cc6ae8a968ccb5033e6363854a4", "versionType": "git"}, {"status": "affected", "version": "6c742e714d8c282fd8f8b22d3e20b5141738c1ee", "lessThan": "68cadc3698c7de88966d306d12ec9c6217da228a", "versionType": "git"}, {"status": "affected", "version": "6c742e714d8c282fd8f8b22d3e20b5141738c1ee", "lessThan": "d49edcc65e0a37cc9b386a94415c5d6670ca8b71", "versionType": "git"}, {"status": "affected", "version": "6c742e714d8c282fd8f8b22d3e20b5141738c1ee", "lessThan": "8211a26324667980a463c069469a818e71207e02", "versionType": "git"}], "programFiles": ["net/ipv4/ipip.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.12"}, {"status": "unaffected", "version": "0", "lessThan": "3.12", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.266", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.217", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "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/ipv4/ipip.c"], "defaultStatus": "affected"}]}], "published": "2026-08-15T06:21:14.650", "references": [{"url": "https://git.kernel.org/stable/c/068ad9b85f681755f751ebab82ae98146cec163d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/26544021d5c49cc6ae8a968ccb5033e6363854a4", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/68cadc3698c7de88966d306d12ec9c6217da228a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8211a26324667980a463c069469a818e71207e02", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/91571643e554ae89a91942380d5f5361fb7060a2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/983cc4aa7e6f633b34c3ee743771252d7afa9a90", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a7d2642a50282322bc33f34ee7305f2b793df494", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d49edcc65e0a37cc9b386a94415c5d6670ca8b71", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipip: require CAP_NET_ADMIN in the device netns for changelink\n\nipip_changelink() operates on at most two netns, dev_net(dev) and the\ntunnel link netns t->net. They differ once the device is created in or\nmoved to a netns other than the one the request runs in. The rtnl\nchangelink path checks CAP_NET_ADMIN only against dev_net(dev), so a\ncaller privileged there but not in t->net can rewrite a tunnel that\nlives in t->net.\n\nGate ipip_changelink() on rtnl_dev_link_net_capable() at its top,\nbefore any attribute is parsed."}], "lastModified": "2026-08-23T13:16:38.440", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}