{"id":"CVE-2026-98857","title":"ipvs: bound LBLCR and LBLC cache growth","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: bound LBLCR and LBLC cache growth\n\nip_vs_lblcr_new() and ip_vs_lblc_new() create cache entries for\nevery previously unseen destination address. The table max_size…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 31028d7b970962fbeda1e9131405c76551094300","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6316d17324bd4ca400c26adb7b656c6e3447c209","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 16c83c047ecfaf226ad81d45d77fa11a3184d0e4","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2a3c3de660f96865f303fd25f1285f2ffbfd521d","Linux 2.6.12"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:51:17.262Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98857","references":[{"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":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.461Z","slug":"CVE-2026-98857","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nipvs: bound LBLCR and LBLC cache growth\n\nip_vs_lblcr_new() and ip_vs_lblc_new() create cache entries for\nevery previously unseen destination address. The table max_size only\ntells the periodic collector to reclaim entries after the cache has\nalready exceeded the limit. It does not reclaim entries that the\nattacker continues to use.\n\nReject new cache entries once either table reaches max_size * 3 / 2.\nThe extra headroom lets the periodic collector catch up while the\nexisting scheduler fallback continues to use the selected destination\nwhen cache creation fails. New traffic therefore stays serviceable\nwithout growing the tables further.\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 31028d7b970962fbeda1e9131405c76551094300`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6316d17324bd4ca400c26adb7b656c6e3447c209`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 16c83c047ecfaf226ad81d45d77fa11a3184d0e4`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2a3c3de660f96865f303fd25f1285f2ffbfd521d`\n- `Linux 2.6.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}