CVE-2026-98569

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98569", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.357Z", "datePublished": "2026-10-18T15:18:35.413Z", "dateUpdated": "2026-10-19T09:21:54.816Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:21:54.816Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nip_gre: Reject enabling collect metadata through changelink\n\nipgre_netlink_parms() can enable collect_md on an existing GRE, GRETAP\nor ERSPAN device. Unlike newlink, changelink does not enforce metadata\ntunnel uniqueness. Converting a non-metadata device can therefore\nreplace the metadata receive entry for another device of the same type\nin the same netns. Deleting either device then clears the shared entry,\nbreaking metadata receive lookup for the surviving device.\n\nIf parameter validation fails after collect_md is set, deleting the\nmodified device can also clear an entry it never owned.\n\nReject enabling metadata mode in both changelink callbacks before any\nencapsulation or tunnel parameters are modified. Allow requests that\nrepeat the metadata attribute on an existing metadata device."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/ip_gre.c"], "versions": [{"version": "2e15ea390e6f4466655066d97e22ec66870a042c", "lessThan": "c80315da84998b69b8829785a174b0bf72a81992", "status": "affected", "versionType": "git"}, {"version": "2e15ea390e6f4466655066d97e22ec66870a042c", "lessThan": "cff8b520312e750ad38967c30128e1534cbf9484", "status": "affected", "versionType": "git"}, {"version": "2e15ea390e6f4466655066d97e22ec66870a042c", "lessThan": "1dc759571f3df14891175fc52527f7624ba01322", "status": "affected", "versionType": "git"}, {"version": "2e15ea390e6f4466655066d97e22ec66870a042c", "lessThan": "da2e0cfbb620b199927a1e5b93b7cfde32083c7d", "status": "affected", "versionType": "git"}, {"version": "2e15ea390e6f4466655066d97e22ec66870a042c", "lessThan": "2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c", "status": "affected", "versionType": "git"}, {"version": "2e15ea390e6f4466655066d97e22ec66870a042c", "lessThan": "bdd41b96e814300c66222cf4e47ecb8aef995656", "status": "affected", "versionType": "git"}, {"version": "2e15ea390e6f4466655066d97e22ec66870a042c", "lessThan": "63c5e48d6f7f5722a48f63e13e961dc5302894ed", "status": "affected", "versionType": "git"}, {"version": "2e15ea390e6f4466655066d97e22ec66870a042c", "lessThan": "a3f315be9d30eeb6938d11fa17fd4b32d52f7c42", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/ip_gre.c"], "versions": [{"version": "4.3", "status": "affected"}, {"version": "0", "lessThan": "4.3", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c80315da84998b69b8829785a174b0bf72a81992"}, {"url": "https://git.kernel.org/stable/c/cff8b520312e750ad38967c30128e1534cbf9484"}, {"url": "https://git.kernel.org/stable/c/1dc759571f3df14891175fc52527f7624ba01322"}, {"url": "https://git.kernel.org/stable/c/da2e0cfbb620b199927a1e5b93b7cfde32083c7d"}, {"url": "https://git.kernel.org/stable/c/2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c"}, {"url": "https://git.kernel.org/stable/c/bdd41b96e814300c66222cf4e47ecb8aef995656"}, {"url": "https://git.kernel.org/stable/c/63c5e48d6f7f5722a48f63e13e961dc5302894ed"}, {"url": "https://git.kernel.org/stable/c/a3f315be9d30eeb6938d11fa17fd4b32d52f7c42"}], "title": "ip_gre: Reject enabling collect metadata through changelink", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv4/ip_gre.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c80315da84998b69b8829785a174b0bf72a81992", "status": "affected", "version": "2e15ea390e6f4466655066d97e22ec66870a042c", "versionType": "git"}, {"lessThan": "cff8b520312e750ad38967c30128e1534cbf9484", "status": "affected", "version": "2e15ea390e6f4466655066d97e22ec66870a042c", "versionType": "git"}, {"lessThan": "1dc759571f3df14891175fc52527f7624ba01322", "status": "affected", "version": "2e15ea390e6f4466655066d97e22ec66870a042c", "versionType": "git"}, {"lessThan": "da2e0cfbb620b199927a1e5b93b7cfde32083c7d", "status": "affected", "version": "2e15ea390e6f4466655066d97e22ec66870a042c", "versionType": "git"}, {"lessThan": "2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c", "status": "affected", "version": "2e15ea390e6f4466655066d97e22ec66870a042c", "versionType": "git"}, {"lessThan": "bdd41b96e814300c66222cf4e47ecb8aef995656", "status": "affected", "version": "2e15ea390e6f4466655066d97e22ec66870a042c", "versionType": "git"}, {"lessThan": "63c5e48d6f7f5722a48f63e13e961dc5302894ed", "status": "affected", "version": "2e15ea390e6f4466655066d97e22ec66870a042c", "versionType": "git"}, {"lessThan": "a3f315be9d30eeb6938d11fa17fd4b32d52f7c42", "status": "affected", "version": "2e15ea390e6f4466655066d97e22ec66870a042c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv4/ip_gre.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.3"}, {"lessThan": "4.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.271", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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\nip_gre: Reject enabling collect metadata through changelink\n\nipgre_netlink_parms() can enable collect_md on an existing GRE, GRETAP\nor ERSPAN device. Unlike newlink, changelink does not enforce metadata\ntunnel uniqueness. Converting a non-metadata device can therefore\nreplace the metadata receive entry for another device of the same type\nin the same netns. Deleting either device then clears the shared entry,\nbreaking metadata receive lookup for the surviving device.\n\nIf parameter validation fails after collect_md is set, deleting the\nmodified device can also clear an entry it never owned.\n\nReject enabling metadata mode in both changelink callbacks before any\nencapsulation or tunnel parameters are modified. Allow requests that\nrepeat the metadata attribute on an existing metadata device."}], "id": "CVE-2026-98569", "lastModified": "2026-10-19T10:19:14.887", "metrics": {}, "published": "2026-10-18T16:17:09.113", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1dc759571f3df14891175fc52527f7624ba01322"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/63c5e48d6f7f5722a48f63e13e961dc5302894ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a3f315be9d30eeb6938d11fa17fd4b32d52f7c42"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bdd41b96e814300c66222cf4e47ecb8aef995656"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c80315da84998b69b8829785a174b0bf72a81992"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cff8b520312e750ad38967c30128e1534cbf9484"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/da2e0cfbb620b199927a1e5b93b7cfde32083c7d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ip_gre: Reject enabling collect metadata through changelink", "id": "2554918", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554918"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-694", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nip_gre: Reject enabling collect metadata through changelink\nipgre_netlink_parms() can enable collect_md on an existing GRE, GRETAP\nor ERSPAN device. Unlike newlink, changelink does not enforce metadata\ntunnel uniqueness. Converting a non-metadata device can therefore\nreplace the metadata receive entry for another device of the same type\nin the same netns. Deleting either device then clears the shared entry,\nbreaking metadata receive lookup for the surviving device.\nIf parameter validation fails after collect_md is set, deleting the\nmodified device can also clear an entry it never owned.\nReject enabling metadata mode in both changelink callbacks before any\nencapsulation or tunnel parameters are modified. Allow requests that\nrepeat the metadata attribute on an existing metadata device.", "A flaw was found in the Linux kernel's Generic Routing Encapsulation (GRE) subsystem. A local user with network administration privileges could cause a Denial of Service (DoS) by enabling metadata collection on an existing GRE network device through a netlink interface modification request. Because the kernel fails to verify tunnel uniqueness during link modifications, this operation can overwrite shared metadata lookup entries, breaking packet reception for other active tunnel devices in the same network namespace when either device is removed."], "name": "CVE-2026-98569", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98569\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98569\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98569.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e15ea390e6f4466655066d97e22ec66870a042c,c80315da84998b69b8829785a174b0bf72a81992)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e15ea390e6f4466655066d97e22ec66870a042c,cff8b520312e750ad38967c30128e1534cbf9484)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e15ea390e6f4466655066d97e22ec66870a042c,1dc759571f3df14891175fc52527f7624ba01322)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e15ea390e6f4466655066d97e22ec66870a042c,da2e0cfbb620b199927a1e5b93b7cfde32083c7d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e15ea390e6f4466655066d97e22ec66870a042c,2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e15ea390e6f4466655066d97e22ec66870a042c,bdd41b96e814300c66222cf4e47ecb8aef995656)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e15ea390e6f4466655066d97e22ec66870a042c,63c5e48d6f7f5722a48f63e13e961dc5302894ed)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e15ea390e6f4466655066d97e22ec66870a042c,a3f315be9d30eeb6938d11fa17fd4b32d52f7c42)"}}], "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": "generic", "value": "4.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.271,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.222,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.189,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "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": "2026-10-19T00:00:10.774822+00:00", "updated": "2026-10-22T22:00:15.041504+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}