{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98853", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.376Z", "datePublished": "2026-10-18T15:51:02.683Z", "dateUpdated": "2026-10-30T12:40:14.136Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:40:14.136Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gso: limit recursive IP-in-IP segmentation\n\nIP-in-IP GSO can re-enter inet_gso_segment() or ipv6_gso_segment()\nfor each nested IP header. encap_level tracks header bytes, not callback\ndepth, so a deep chain can exhaust the kernel stack. Making\ninet_gso_segment() stackable introduced unbounded IPv4 nesting; IPIP\nGSO/TSO later made the path reachable. The IPv6 stackable path was\nintroduced separately and uses the same guard.\n\nCount IPv4 and IPv6 GSO handler entries in skb_gso_cb, initialized once\nper top-level GSO operation and preserved across GRE/UDP context changes.\nUse the existing IP_TUNNEL_RECURSION_LIMIT for both handlers. The first\nfive entries pass, and the sixth returns -EINVAL before dispatching\nanother GSO callback."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/gso.h", "net/core/gso.c", "net/ipv4/af_inet.c", "net/ipv6/ip6_offload.c"], "versions": [{"version": "3347c960295583eee3fd58e5c539fb1972fbc005", "lessThan": "388604279da3d0698a151efa4fb6d852efa0de4a", "status": "affected", "versionType": "git"}, {"version": "3347c960295583eee3fd58e5c539fb1972fbc005", "lessThan": "c949646c900e879afce47df1b607fa320eb63bf2", "status": "affected", "versionType": "git"}, {"version": "3347c960295583eee3fd58e5c539fb1972fbc005", "lessThan": "006c8b834aed8b02bd8fb9fb05e9e7ead37d1763", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/gso.h", "net/core/gso.c", "net/ipv4/af_inet.c", "net/ipv6/ip6_offload.c"], "versions": [{"version": "3.13", "status": "affected"}, {"version": "0", "lessThan": "3.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.60", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "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": "3.13", "versionEndExcluding": "6.18.60"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/388604279da3d0698a151efa4fb6d852efa0de4a"}, {"url": "https://git.kernel.org/stable/c/c949646c900e879afce47df1b607fa320eb63bf2"}, {"url": "https://git.kernel.org/stable/c/006c8b834aed8b02bd8fb9fb05e9e7ead37d1763"}], "title": "net: gso: limit recursive IP-in-IP segmentation", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/net/gso.h", "net/core/gso.c", "net/ipv4/af_inet.c", "net/ipv6/ip6_offload.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "388604279da3d0698a151efa4fb6d852efa0de4a", "status": "affected", "version": "3347c960295583eee3fd58e5c539fb1972fbc005", "versionType": "git"}, {"lessThan": "c949646c900e879afce47df1b607fa320eb63bf2", "status": "affected", "version": "3347c960295583eee3fd58e5c539fb1972fbc005", "versionType": "git"}, {"lessThan": "006c8b834aed8b02bd8fb9fb05e9e7ead37d1763", "status": "affected", "version": "3347c960295583eee3fd58e5c539fb1972fbc005", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["include/net/gso.h", "net/core/gso.c", "net/ipv4/af_inet.c", "net/ipv6/ip6_offload.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.13"}, {"lessThan": "3.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.60", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "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\nnet: gso: limit recursive IP-in-IP segmentation\n\nIP-in-IP GSO can re-enter inet_gso_segment() or ipv6_gso_segment()\nfor each nested IP header. encap_level tracks header bytes, not callback\ndepth, so a deep chain can exhaust the kernel stack. Making\ninet_gso_segment() stackable introduced unbounded IPv4 nesting; IPIP\nGSO/TSO later made the path reachable. The IPv6 stackable path was\nintroduced separately and uses the same guard.\n\nCount IPv4 and IPv6 GSO handler entries in skb_gso_cb, initialized once\nper top-level GSO operation and preserved across GRE/UDP context changes.\nUse the existing IP_TUNNEL_RECURSION_LIMIT for both handlers. The first\nfive entries pass, and the sixth returns -EINVAL before dispatching\nanother GSO callback."}], "id": "CVE-2026-98853", "lastModified": "2026-10-30T13:21:30.870", "metrics": {}, "published": "2026-10-18T16:17:39.733", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/006c8b834aed8b02bd8fb9fb05e9e7ead37d1763"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/388604279da3d0698a151efa4fb6d852efa0de4a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c949646c900e879afce47df1b607fa320eb63bf2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: gso: limit recursive IP-in-IP segmentation", "id": "2555206", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555206"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: gso: limit recursive IP-in-IP segmentation\nIP-in-IP GSO can re-enter inet_gso_segment() or ipv6_gso_segment()\nfor each nested IP header. encap_level tracks header bytes, not callback\ndepth, so a deep chain can exhaust the kernel stack. Making\ninet_gso_segment() stackable introduced unbounded IPv4 nesting; IPIP\nGSO/TSO later made the path reachable. The IPv6 stackable path was\nintroduced separately and uses the same guard.\nCount IPv4 and IPv6 GSO handler entries in skb_gso_cb, initialized once\nper top-level GSO operation and preserved across GRE/UDP context changes.\nUse the existing IP_TUNNEL_RECURSION_LIMIT for both handlers. The first\nfive entries pass, and the sixth returns -EINVAL before dispatching\nanother GSO callback.", "A flaw was found in the Linux kernel's Generic Segmentation Offload (GSO) implementation. When processing deeply nested IP-in-IP packets, recursive segmentation is not properly restricted, which can exhaust kernel stack memory. A remote attacker could exploit this vulnerability by transmitting network packets with excessive encapsulation layers, causing a kernel crash and leading to a Denial of Service (DoS)."], "name": "CVE-2026-98853", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "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"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "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-2026-98853\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98853\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98853.mbox"], "threat_severity": "Important"}