{"id":"CVE-2026-98857","title":"kernel: ipvs: bound LBLCR and LBLC cache growth (CVE-2026-98857)","summary":"A flaw was found in the Linux kernel's IP Virtual Server (IPVS) module. The load-balancing cache fails to enforce strict bounds on table growth when entries remain continuously active. A remote attacker can exploit this vulnerability by tr…","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","cvssSource":"vendor","cwe":"CWE-770","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-24","sourceUpdated":"2026-10-24T06:03:36+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98857.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98857.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98857"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555229"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98857"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98857"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98857.mbox"},{"url":"https://git.kernel.org/stable/c/bc9ff8e64771cc32a216953fe615386f46ac1eaa"},{"url":"https://git.kernel.org/stable/c/31028d7b970962fbeda1e9131405c76551094300"},{"url":"https://git.kernel.org/stable/c/6316d17324bd4ca400c26adb7b656c6e3447c209"},{"url":"https://git.kernel.org/stable/c/16c83c047ecfaf226ad81d45d77fa11a3184d0e4"},{"url":"https://git.kernel.org/stable/c/2a3c3de660f96865f303fd25f1285f2ffbfd521d"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00156,"epssPercentile":0.04714,"ingestedAt":"2026-10-18T16:47:32.461Z","slug":"CVE-2026-98857","body":"## Overview\n\nA flaw was found in the Linux kernel's IP Virtual Server (IPVS) module. The load-balancing cache fails to enforce strict bounds on table growth when entries remain continuously active. A remote attacker can exploit this vulnerability by transmitting network traffic to unique destination addresses, leading to excessive kernel memory consumption and a Denial of Service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98857.json)\n\n**kernel: ipvs: bound LBLCR and LBLC cache growth** — rated Important by Red Hat. Released 2026-10-18, updated 2026-10-24.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nAffected","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228534,"id":"CVE-2026-98857","ts":1792844776640,"field":"cvss","old":null,"new":"7.5"},{"seq":228533,"id":"CVE-2026-98857","ts":1792844776640,"field":"severity","old":"none","new":"high"}]}