{"id":"CVE-2026-74281","title":"kernel: tipc: reject inverted service ranges from peer bindings (CVE-2026-74281)","summary":"A flaw was found in the Linux kernel's Transparent Inter-Process Communication (TIPC) module. A remote attacker, acting as a peer node, could exploit this by sending specially crafted PUBLICATION messages with inverted service ranges. This…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","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":"2026-10-16T23:15:07+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74281.json","references":[{"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"},{"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"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.007,"epssPercentile":0.52241,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T18:52:04.430800Z"},"scores":{"vendor":5.5,"cna":7.5},"ingestedAt":"2026-10-16T19:46:24.385Z","slug":"CVE-2026-74281","body":"## Overview\n\nA flaw was found in the Linux kernel's Transparent Inter-Process Communication (TIPC) module. A remote attacker, acting as a peer node, could exploit this by sending specially crafted PUBLICATION messages with inverted service ranges. This oversight in validating service range bounds allows the attacker to cause unbounded memory leaks in the binding table, leading to a denial of service (DoS) for the affected system.\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)\n\n**kernel: tipc: reject inverted service ranges from peer bindings** — rated Moderate by Red Hat. Released 2026-08-15, updated 2026-10-16.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n\n## Remediation\n\nFix deferred\n\nWorkarounds / mitigations:\n\n- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"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"}]}