{"id":"CVE-2026-74281","state":"PUBLISHED","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.","publishedAt":"2026-08-15T05:57:51.423Z","updatedAt":"2026-10-16T18:55:29.746Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"cd1955f81bd8ebeef51b324989ac871ad1947fb6","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"f683200b83a0085d4e11abea8c1fdd9fdfb95b0b","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"f1715d92ee3095d9215b493a8603a81f646fcf61","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"581ef56e5c34d475056ce086dc2ba0e872ba6857","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"7e401233f9bb74a626e70698d0d62f3a94ac0676","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"973bf0ed896b9898668dbadb82ed849d7d573010","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"2afb648f7b99216c687db1f89739c995e1144153","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tipc/name_distr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.17","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tipc/name_distr.c"]}],"references":["https://git.kernel.org/stable/c/cd1955f81bd8ebeef51b324989ac871ad1947fb6","https://git.kernel.org/stable/c/f683200b83a0085d4e11abea8c1fdd9fdfb95b0b","https://git.kernel.org/stable/c/f1715d92ee3095d9215b493a8603a81f646fcf61","https://git.kernel.org/stable/c/581ef56e5c34d475056ce086dc2ba0e872ba6857","https://git.kernel.org/stable/c/7e401233f9bb74a626e70698d0d62f3a94ac0676","https://git.kernel.org/stable/c/973bf0ed896b9898668dbadb82ed849d7d573010","https://git.kernel.org/stable/c/2afb648f7b99216c687db1f89739c995e1144153"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74281.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74281","state":"PUBLISHED","datePublished":"2026-08-15T05:57:51.423Z","dateUpdated":"2026-10-16T18:55:29.746Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.880Z"},"containers":{"cna":{"title":"tipc: reject inverted service ranges from peer bindings","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"cd1955f81bd8ebeef51b324989ac871ad1947fb6","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"f683200b83a0085d4e11abea8c1fdd9fdfb95b0b","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"f1715d92ee3095d9215b493a8603a81f646fcf61","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"581ef56e5c34d475056ce086dc2ba0e872ba6857","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"7e401233f9bb74a626e70698d0d62f3a94ac0676","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"973bf0ed896b9898668dbadb82ed849d7d573010","versionType":"git"},{"version":"37922ea4a3105176357c8d565a9d982c4a08714a","status":"affected","lessThan":"2afb648f7b99216c687db1f89739c995e1144153","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tipc/name_distr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.17","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tipc/name_distr.c"]}],"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"}],"metrics":[{"cvssV3_1":{"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"},"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":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:45:22.291Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-74281","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-16T18:52:04.430800Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T18:55:29.746Z"}}]}}}