{"id":"CVE-2026-98851","aliases":[],"cve":{"records":[{"id":"CVE-2026-98851","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.376Z","published":"2026-10-18T15:50:50.910Z","modified":"2026-10-30T12:40:13.069Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-10-30T12:40:13.069Z"}],"references":[{"url":"https://git.kernel.org/stable/c/4e5a6d89083af6f23f0ac2cb611ef267590a3ece","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/1f43b6b099fa39032780b9494cedfd98f318f3c4","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/87f4914758f2da10b56cdb7f90ed815ade1e8ea3","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/1d27214fd9a4d2c0c6d998fc9d4fb61448a3438e","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/64ac0cb574c740bf723affb79b646eeba920db6b","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/c5f91098edee98c015f78488460a0609e62582a5","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/4cd378423a33194a773c267fc58606d28fce95cf","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/747928b5d4ff8c8de55138a54c13980e4bb88578","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"7.3"}]}]}]}],"prioritization":[]},"title":"netfilter: nft_flow_offload: drop flowtable reference on init error path","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_flow_offload: drop flowtable reference on init error path\n\nnft_flow_offload_init() bumps the flowtable use count with\nnft_use_inc() before calling nf_ct_netns_get().  When the latter\nfails, the error is returned as-is and the reference is leaked.\n\nThe upper layers do not balance it either: nf_tables_newexpr()\nclears expr->ops when the expression init callback fails, so the\nnft_expr_more() iteration in nft_rule_expr_deactivate() and\nnf_tables_rule_destroy() stops right before the failed expression\nand its ->destroy callback, which would drop the reference, never\nruns.\n\nEach failed rule addition therefore leaks one flowtable reference\nand the flowtable can no longer be removed: NFT_MSG_DELFLOWTABLE\nkeeps reporting -EBUSY even though no rule references it.\n\nSave the nf_ct_netns_get() return value and undo the nft_use_inc()\nwhen it fails, restoring the inc/dec pairing within\nnft_flow_offload_init() itself.","score":null,"severity":"unknown","published":"2026-10-18T15:50:50.910Z","modified":"2026-10-30T12:40:13.069Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"a3c90f7a2323b331ae816d5b0633e68148e25d04","status":"affected","lessThan":"4e5a6d89083af6f23f0ac2cb611ef267590a3ece","versionType":"git"},{"version":"a3c90f7a2323b331ae816d5b0633e68148e25d04","status":"affected","lessThan":"1f43b6b099fa39032780b9494cedfd98f318f3c4","versionType":"git"},{"version":"a3c90f7a2323b331ae816d5b0633e68148e25d04","status":"affected","lessThan":"87f4914758f2da10b56cdb7f90ed815ade1e8ea3","versionType":"git"},{"version":"a3c90f7a2323b331ae816d5b0633e68148e25d04","status":"affected","lessThan":"1d27214fd9a4d2c0c6d998fc9d4fb61448a3438e","versionType":"git"},{"version":"a3c90f7a2323b331ae816d5b0633e68148e25d04","status":"affected","lessThan":"64ac0cb574c740bf723affb79b646eeba920db6b","versionType":"git"},{"version":"a3c90f7a2323b331ae816d5b0633e68148e25d04","status":"affected","lessThan":"c5f91098edee98c015f78488460a0609e62582a5","versionType":"git"},{"version":"a3c90f7a2323b331ae816d5b0633e68148e25d04","status":"affected","lessThan":"4cd378423a33194a773c267fc58606d28fce95cf","versionType":"git"},{"version":"a3c90f7a2323b331ae816d5b0633e68148e25d04","status":"affected","lessThan":"747928b5d4ff8c8de55138a54c13980e4bb88578","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98851"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"4.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.16","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98851"}],"remediation":[],"references":["https://git.kernel.org/stable/c/4e5a6d89083af6f23f0ac2cb611ef267590a3ece","https://git.kernel.org/stable/c/1f43b6b099fa39032780b9494cedfd98f318f3c4","https://git.kernel.org/stable/c/87f4914758f2da10b56cdb7f90ed815ade1e8ea3","https://git.kernel.org/stable/c/1d27214fd9a4d2c0c6d998fc9d4fb61448a3438e","https://git.kernel.org/stable/c/64ac0cb574c740bf723affb79b646eeba920db6b","https://git.kernel.org/stable/c/c5f91098edee98c015f78488460a0609e62582a5","https://git.kernel.org/stable/c/4cd378423a33194a773c267fc58606d28fce95cf","https://git.kernel.org/stable/c/747928b5d4ff8c8de55138a54c13980e4bb88578"],"sources":[{"name":"CVE","id":"CVE-2026-98851","modified":"2026-10-30T12:40:13.069Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-98851"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-10-30T13:09:49.084Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T04:05:32.009Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":null}