{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72052", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.902Z", "datePublished": "2026-08-15T05:52:09.194Z", "dateUpdated": "2026-08-17T05:39:48.851Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:39:48.851Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ip6_gre: require CAP_NET_ADMIN in the device netns 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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is reached only via rtnetlink (RTM_NEWLINK changelink) on a local NETLINK_ROUTE socket, not by processing attacker-controlled network packets; kernel guidance classifies rtnetlink control-plane bugs as Local.\nAC:L - With CAP_NET_ADMIN in dev_net(dev) (e.g. via user namespaces), an attacker can move a cross-netns ip6gre device or use an existing one, then issue a single deterministic changelink; no uncontrollable races or rare kernel configs are required.\nPR:L - Exploitation requires CAP_NET_ADMIN in dev_net(dev) to issue RTM_NEWLINK changelink; this capability is available to unprivileged users creating user+network namespaces (unshare -Urn), not only real init-namespace root.\nUI:N - No victim interaction is needed once the attacker has a suitable ip6gre/ip6gretap/ip6erspan netdev handle and issues rtnetlink changelink requests to rewrite tunnel parameters.\nS:C - The flaw crosses the network-namespace security boundary: a caller authorized only in dev_net(dev) can modify ip6gre state and routing tables in t->net (another tenant/host namespace), violating netns isolation relied on by containers and Kubernetes.\nC:H - changelink can point tunnels/ERSPAN mirroring at attacker-chosen IPv6 endpoints and keys, enabling interception and collection of traffic that other namespaces expect to be privately encapsulated or mirrored only to trusted collectors.\nI:H - The attacker can arbitrarily rewrite tunnel link parameters (local/remote addresses, keys, encap, fwmark, ERSPAN index) and rehash tunnel state in the victim link netns, redirecting or corrupting network paths outside their authorization.\nA:H - Rewriting or unlinking tunnel entries can immediately break GRE/ERSPAN connectivity depended on for production links, causing sustained network outage or repeated loss of availability without kernel interaction from the victim."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/ip6_gre.c"], "versions": [{"version": "690afc165bb314354667f67157c1a1aea7dc797a", "lessThan": "129f8939e5af683cec3a1a5edcb40a64636ad81e", "status": "affected", "versionType": "git"}, {"version": "690afc165bb314354667f67157c1a1aea7dc797a", "lessThan": "e3724dedf57761c6de52f4d604ec74f66fd61611", "status": "affected", "versionType": "git"}, {"version": "690afc165bb314354667f67157c1a1aea7dc797a", "lessThan": "220162c9fedbe992da70d70f50a10da4f45f914c", "status": "affected", 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"https://git.kernel.org/stable/c/e3724dedf57761c6de52f4d604ec74f66fd61611"}, {"url": "https://git.kernel.org/stable/c/220162c9fedbe992da70d70f50a10da4f45f914c"}, {"url": "https://git.kernel.org/stable/c/1d4d8ee002083ca4ead5353662bf8362428af57f"}, {"url": "https://git.kernel.org/stable/c/0caa9f348f8b5356900de77b0bb89a697c4aff20"}, {"url": "https://git.kernel.org/stable/c/03d8843b143ebbbfaf48511922abc6e886575a61"}, {"url": "https://git.kernel.org/stable/c/c38c8b0db3c65b597e7ece317b6cb59de3d15e69"}, {"url": "https://git.kernel.org/stable/c/f00a50876d2818bd6dc86fa98b3ef360884c53c8"}], "title": "net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv6/ip6_gre.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "129f8939e5af683cec3a1a5edcb40a64636ad81e", "status": "affected", "version": "690afc165bb314354667f67157c1a1aea7dc797a", "versionType": "git"}, {"lessThan": "e3724dedf57761c6de52f4d604ec74f66fd61611", "status": "affected", "version": "690afc165bb314354667f67157c1a1aea7dc797a", "versionType": "git"}, {"lessThan": "220162c9fedbe992da70d70f50a10da4f45f914c", "status": "affected", "version": "690afc165bb314354667f67157c1a1aea7dc797a", "versionType": "git"}, {"lessThan": "1d4d8ee002083ca4ead5353662bf8362428af57f", "status": "affected", "version": "690afc165bb314354667f67157c1a1aea7dc797a", "versionType": "git"}, {"lessThan": "0caa9f348f8b5356900de77b0bb89a697c4aff20", "status": "affected", "version": "690afc165bb314354667f67157c1a1aea7dc797a", "versionType": "git"}, {"lessThan": "03d8843b143ebbbfaf48511922abc6e886575a61", "status": "affected", "version": "690afc165bb314354667f67157c1a1aea7dc797a", "versionType": "git"}, {"lessThan": "c38c8b0db3c65b597e7ece317b6cb59de3d15e69", "status": "affected", "version": "690afc165bb314354667f67157c1a1aea7dc797a", "versionType": "git"}, {"lessThan": "f00a50876d2818bd6dc86fa98b3ef360884c53c8", "status": "affected", "version": "690afc165bb314354667f67157c1a1aea7dc797a", "versionType": "git"}, {"status": "affected", "version": "d0201d2405dac8d9b16773e97709925e397552d0", "versionType": "git"}, {"status": "affected", "version": "7943bb0f06365cf5e32f3cf8a6b29eeae981fb8a", "versionType": "git"}, {"lessThan": "4.20", "status": "affected", "version": "4.19.100", "versionType": "semver"}, {"lessThan": "5.5", "status": "affected", "version": "5.4.16", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv6/ip6_gre.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.5"}, {"lessThan": "5.5", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ip6_gre: require CAP_NET_ADMIN in the device netns 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."}], "id": "CVE-2026-72052", "lastModified": "2026-08-17T06:18:03.330", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:21:14.523", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "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": "https://git.kernel.org/stable/c/129f8939e5af683cec3a1a5edcb40a64636ad81e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1d4d8ee002083ca4ead5353662bf8362428af57f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/220162c9fedbe992da70d70f50a10da4f45f914c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c38c8b0db3c65b597e7ece317b6cb59de3d15e69"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e3724dedf57761c6de52f4d604ec74f66fd61611"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f00a50876d2818bd6dc86fa98b3ef360884c53c8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink", "id": "2516306", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516306"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-266", "details": ["A flaw was found in the Linux kernel's `ip6_gre` and `ip6erspan` tunnel drivers. The `changelink` functions in these drivers do not adequately verify administrative capabilities (`CAP_NET_ADMIN`) across different network namespaces. This allows a local attacker, who has `CAP_NET_ADMIN` in one network namespace but not in the tunnel's network namespace, to modify the tunnel's configuration. This could lead to unauthorized changes to network tunnel settings."], "name": "CVE-2026-72052", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72052\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72052\nhttps://lore.kernel.org/linux-cve-announce/2026081515-CVE-2026-72052-1653@gregkh/T"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[690afc165bb314354667f67157c1a1aea7dc797a,129f8939e5af683cec3a1a5edcb40a64636ad81e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[690afc165bb314354667f67157c1a1aea7dc797a,e3724dedf57761c6de52f4d604ec74f66fd61611)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[690afc165bb314354667f67157c1a1aea7dc797a,220162c9fedbe992da70d70f50a10da4f45f914c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[690afc165bb314354667f67157c1a1aea7dc797a,1d4d8ee002083ca4ead5353662bf8362428af57f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[690afc165bb314354667f67257c1a1aea7dc797a,0caa9f348f8b5356900de77b0bb89a697c4aff20)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[690afc165bb314354667f67157c1a1aea7dc797a,03d8843b143ebbbfaf48511922abc6e886575a61)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[690afc165bb314354667f67157c1a1aea7dc797a,c38c8b0db3c65b597e7ece317b6cb59de3d15e69)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[690afc165bb314354667f67157c1a1aea7dc797a,f00a50876d2818bd6dc86fa98b3ef360884c53c8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "d0201d2405dac8d9b16773e97709925e397552d0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "7943bb0f06365cf5e32f3cf8a6b29eeae981fb8a"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.19.100,4.20)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.16,5.5)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.5"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.5)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T08:00:06.710098+00:00", "updated": "2026-08-18T06:00:04.165152+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}