{"api_version":"1","generated_at":"2026-08-21T02:38:23+00:00","cve":"CVE-2026-74281","urls":{"html":"https://cve.report/CVE-2026-74281","api":"https://cve.report/api/cve/CVE-2026-74281.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74281","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74281"},"summary":{"title":"tipc: reject inverted service ranges from peer bindings","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: reject inverted service ranges from peer bindings\n\ntipc_update_nametbl() inserts a binding advertised by a peer node using\nthe lower and upper service-range bounds taken directly from the wire,\nwithout checking that lower <= upper. The local bind path validates the\nordering (tipc_uaddr_valid()), but the name-distribution path does not.\n\nA binding with lower > upper is inserted at the far end of the\nservice-range rbtree (keyed on lower) where no lookup or withdrawal can\never match it (service_range_foreach_match() requires sr->lower <= end).\nThe publication, its service_range node and the augmented rbtree entry\nare then leaked for the lifetime of the namespace, and there is no\nper-peer cap equivalent to TIPC_MAX_PUBL on locally created bindings.\n\nReject inverted ranges in the network path as well. A peer node can\notherwise leak unbounded binding-table memory by sending PUBLICATION\nitems with lower > upper.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:27","updated_at":"2026-08-17 06:19:21"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/7e401233f9bb74a626e70698d0d62f3a94ac0676","name":"https://git.kernel.org/stable/c/7e401233f9bb74a626e70698d0d62f3a94ac0676","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f1715d92ee3095d9215b493a8603a81f646fcf61","name":"https://git.kernel.org/stable/c/f1715d92ee3095d9215b493a8603a81f646fcf61","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/973bf0ed896b9898668dbadb82ed849d7d573010","name":"https://git.kernel.org/stable/c/973bf0ed896b9898668dbadb82ed849d7d573010","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f683200b83a0085d4e11abea8c1fdd9fdfb95b0b","name":"https://git.kernel.org/stable/c/f683200b83a0085d4e11abea8c1fdd9fdfb95b0b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/581ef56e5c34d475056ce086dc2ba0e872ba6857","name":"https://git.kernel.org/stable/c/581ef56e5c34d475056ce086dc2ba0e872ba6857","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cd1955f81bd8ebeef51b324989ac871ad1947fb6","name":"https://git.kernel.org/stable/c/cd1955f81bd8ebeef51b324989ac871ad1947fb6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2afb648f7b99216c687db1f89739c995e1144153","name":"https://git.kernel.org/stable/c/2afb648f7b99216c687db1f89739c995e1144153","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74281","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74281","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 37922ea4a3105176357c8d565a9d982c4a08714a cd1955f81bd8ebeef51b324989ac871ad1947fb6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 37922ea4a3105176357c8d565a9d982c4a08714a f683200b83a0085d4e11abea8c1fdd9fdfb95b0b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 37922ea4a3105176357c8d565a9d982c4a08714a f1715d92ee3095d9215b493a8603a81f646fcf61 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 37922ea4a3105176357c8d565a9d982c4a08714a 581ef56e5c34d475056ce086dc2ba0e872ba6857 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\ntipc: reject inverted service ranges from peer bindings\n\ntipc_update_nametbl() inserts a binding advertised by a peer node using\nthe lower and upper service-range bounds taken directly from the wire,\nwithout checking that lower <= upper. The local bind path validates the\nordering (tipc_uaddr_valid()), but the name-distribution path does not.\n\nA binding with lower > upper is inserted at the far end of the\nservice-range rbtree (keyed on lower) where no lookup or withdrawal can\never match it (service_range_foreach_match() requires sr->lower <= end).\nThe publication, its service_range node and the augmented rbtree entry\nare then leaked for the lifetime of the namespace, and there is no\nper-peer cap equivalent to TIPC_MAX_PUBL on locally created bindings.\n\nReject inverted ranges in the network path as well. A peer node can\notherwise leak unbounded binding-table memory by sending PUBLICATION\nitems with lower > upper."}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:N - NAME_DISTRIBUTOR PUBLICATION messages from a remote TIPC peer are processed via tipc_rcv/tipc_link_rcv into tipc_named_rcv with no local syscall, matching Network attack vector for in-kernel protocol handlers.\nAC:L - Sending PUBLICATION items with lower>upper reliably triggers permanent leaked binding-table entries; attacker controls both ends of the exchange over an established link with no race or victim-dependent timing.\nPR:N - A malicious or compromised cluster peer can send crafted name-table updates without any account or capability on the victim; TIPC accepts peer publications after normal link setup without per-message authentication by default.\nUI:N - Victim nodes ingest peer binding advertisements automatically during TIPC name distribution; no administrator or user action is required beyond routine cluster connectivity.\nS:U - The flaw only causes unreachable kernel heap growth in the victim's network namespace and does not cross VM, container, or IOMMU security boundaries.\nC:N - The issue is allocation without corresponding free of publication/service_range objects; it does not read or disclose kernel or user data beyond attacker-chosen binding fields.\nI:N - Inverted ranges create orphaned nametable metadata without corrupting adjacent memory or modifying legitimate bindings, sockets, or user data.\nA:H - Each unique inverted publication permanently leaks publication, service_range, and rbtree nodes with no per-peer cap and failed cleanup on peer loss/withdrawal, enabling repeatable remote kernel memory exhaustion and OOM."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:45:22.291Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/cd1955f81bd8ebeef51b324989ac871ad1947fb6"},{"url":"https://git.kernel.org/stable/c/f683200b83a0085d4e11abea8c1fdd9fdfb95b0b"},{"url":"https://git.kernel.org/stable/c/f1715d92ee3095d9215b493a8603a81f646fcf61"},{"url":"https://git.kernel.org/stable/c/581ef56e5c34d475056ce086dc2ba0e872ba6857"},{"url":"https://git.kernel.org/stable/c/7e401233f9bb74a626e70698d0d62f3a94ac0676"},{"url":"https://git.kernel.org/stable/c/973bf0ed896b9898668dbadb82ed849d7d573010"},{"url":"https://git.kernel.org/stable/c/2afb648f7b99216c687db1f89739c995e1144153"}],"title":"tipc: reject inverted service ranges from peer bindings","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74281","datePublished":"2026-08-15T05:57:51.423Z","dateReserved":"2026-08-15T05:44:03.880Z","dateUpdated":"2026-08-17T05:45:22.291Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:27","lastModifiedDate":"2026-08-17 06:19:21","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74281","Ordinal":"1","Title":"tipc: reject inverted service ranges from peer bindings","CVE":"CVE-2026-74281","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74281","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: reject inverted service ranges from peer bindings\n\ntipc_update_nametbl() inserts a binding advertised by a peer node using\nthe lower and upper service-range bounds taken directly from the wire,\nwithout checking that lower <= upper. The local bind path validates the\nordering (tipc_uaddr_valid()), but the name-distribution path does not.\n\nA binding with lower > upper is inserted at the far end of the\nservice-range rbtree (keyed on lower) where no lookup or withdrawal can\never match it (service_range_foreach_match() requires sr->lower <= end).\nThe publication, its service_range node and the augmented rbtree entry\nare then leaked for the lifetime of the namespace, and there is no\nper-peer cap equivalent to TIPC_MAX_PUBL on locally created bindings.\n\nReject inverted ranges in the network path as well. A peer node can\notherwise leak unbounded binding-table memory by sending PUBLICATION\nitems with lower > upper.","Type":"Description","Title":"tipc: reject inverted service ranges from peer bindings"}]}}}