{"id":"CVE-2026-74281","title":"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 bound…","summary":"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 bound…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-772"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 8","enterprise_linux 9"],"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:17:36.020","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74281","references":[{"url":"https://git.kernel.org/stable/c/2afb648f7b99216c687db1f89739c995e1144153","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/581ef56e5c34d475056ce086dc2ba0e872ba6857","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7e401233f9bb74a626e70698d0d62f3a94ac0676","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/973bf0ed896b9898668dbadb82ed849d7d573010","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cd1955f81bd8ebeef51b324989ac871ad1947fb6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f1715d92ee3095d9215b493a8603a81f646fcf61","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f683200b83a0085d4e11abea8c1fdd9fdfb95b0b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74281.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-74281"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516857"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74281"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74281"},{"url":"https://lore.kernel.org/linux-cve-announce/2026081546-CVE-2026-74281-fc97@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.0068,"epssPercentile":0.52196,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T18:52:04.430800Z"},"scores":{"nvd":7.5,"vendor":5.5,"cna":7.5},"ingestedAt":"2026-10-16T19:46:24.385Z","slug":"CVE-2026-74281","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74281.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":230321,"id":"CVE-2026-74281","ts":1793130917728,"field":"cvss","old":"5.5","new":"7.5"},{"seq":230320,"id":"CVE-2026-74281","ts":1793130917728,"field":"severity","old":"medium","new":"high"},{"seq":223617,"id":"CVE-2026-74281","ts":1792238338357,"field":"cvss","old":"7.5","new":"5.5"},{"seq":223616,"id":"CVE-2026-74281","ts":1792238338357,"field":"severity","old":"high","new":"medium"}]}