{"api_version":"1","generated_at":"2026-10-21T12:00:43+00:00","cve":"CVE-2026-98857","urls":{"html":"https://cve.report/CVE-2026-98857","api":"https://cve.report/api/cve/CVE-2026-98857.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98857","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98857"},"summary":{"title":"ipvs: bound LBLCR and LBLC cache growth","description":"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 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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:40","updated_at":"2026-10-19 10:19:49"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/16c83c047ecfaf226ad81d45d77fa11a3184d0e4","name":"https://git.kernel.org/stable/c/16c83c047ecfaf226ad81d45d77fa11a3184d0e4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6316d17324bd4ca400c26adb7b656c6e3447c209","name":"https://git.kernel.org/stable/c/6316d17324bd4ca400c26adb7b656c6e3447c209","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2a3c3de660f96865f303fd25f1285f2ffbfd521d","name":"https://git.kernel.org/stable/c/2a3c3de660f96865f303fd25f1285f2ffbfd521d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/31028d7b970962fbeda1e9131405c76551094300","name":"https://git.kernel.org/stable/c/31028d7b970962fbeda1e9131405c76551094300","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98857","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98857","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 31028d7b970962fbeda1e9131405c76551094300 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 6316d17324bd4ca400c26adb7b656c6e3447c209 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 16c83c047ecfaf226ad81d45d77fa11a3184d0e4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 2a3c3de660f96865f303fd25f1285f2ffbfd521d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.113 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.56 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.10 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/ipvs/ip_vs_lblc.c","net/netfilter/ipvs/ip_vs_lblcr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"31028d7b970962fbeda1e9131405c76551094300","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"6316d17324bd4ca400c26adb7b656c6e3447c209","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"16c83c047ecfaf226ad81d45d77fa11a3184d0e4","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"2a3c3de660f96865f303fd25f1285f2ffbfd521d","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/ipvs/ip_vs_lblc.c","net/netfilter/ipvs/ip_vs_lblcr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.12"},{"lessThan":"2.6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.56","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.113","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.56","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.10","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"2.6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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 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."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:26:51.857Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}],"title":"ipvs: bound LBLCR and LBLC cache growth","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98857","datePublished":"2026-10-18T15:51:17.262Z","dateReserved":"2026-09-25T10:25:14.376Z","dateUpdated":"2026-10-19T09:26:51.857Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:40","lastModifiedDate":"2026-10-19 10:19:49","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98857","Ordinal":"1","Title":"ipvs: bound LBLCR and LBLC cache growth","CVE":"CVE-2026-98857","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98857","Ordinal":"1","NoteData":"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 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.","Type":"Description","Title":"ipvs: bound LBLCR and LBLC cache growth"}]}}}