{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"cb833bbc1b3c51e08652d3c86298307c07d3f2db","status":"affected","version":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","versionType":"git"},{"lessThan":"26900306a5a2c3e4f75c643a064525526bb6e5f3","status":"affected","version":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","versionType":"git"},{"lessThan":"0694618cf3e9b120666e31f5f383a6e466d95a0d","status":"affected","version":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","versionType":"git"},{"lessThan":"8def8fbd23f40e945febe913d04b731012ce0082","status":"affected","version":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","versionType":"git"},{"lessThan":"c55940895245d8ef658ab381248a28755218d625","status":"affected","version":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","versionType":"git"},{"lessThan":"fb965b1cfe92b28d28b5ebe3116b81dbef9f2d2f","status":"affected","version":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","versionType":"git"},{"lessThan":"9a05e195618a6d474f2bcd5b6376d0ffc2f00366","status":"affected","version":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","versionType":"git"},{"lessThan":"2195574dc6d9017d32ac346987e12659f931d932","status":"affected","version":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"2.6.31"},{"lessThan":"2.6.31","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.141","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.91","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.33","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]}],"cveId":"CVE-2026-45841","cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO\n\nnf_osf_match_one() computes ctx->window % f->wss.val in the\nOSF_WSS_MODULO branch with no guard for f->wss.val == 0. A\nCAP_NET_ADMIN user can add such a fingerprint via nfnetlink; a\nsubsequent matching TCP SYN divides by zero and panics the kernel.\n\nReject the bogus fingerprint in nfnl_osf_add_callback() above the\nper-option for-loop. f->wss is per-fingerprint, not per-option, so\nthe check must run regardless of f->opt_num (including 0). Also\nreject wss.wc >= OSF_WSS_MAX; nf_osf_match_one() already treats that\nas \"should not happen\".\n\nCrash:\n Oops: divide error: 0000 [#1] SMP KASAN NOPTI\n RIP: 0010:nf_osf_match_one (net/netfilter/nfnetlink_osf.c:98)\n Call Trace:\n <IRQ>\n  nf_osf_match (net/netfilter/nfnetlink_osf.c:220)\n  xt_osf_match_packet (net/netfilter/xt_osf.c:32)\n  ipt_do_table (net/ipv4/netfilter/ip_tables.c:348)\n  nf_hook_slow (net/netfilter/core.c:622)\n  ip_local_deliver (net/ipv4/ip_input.c:265)\n  ip_rcv (include/linux/skbuff.h:1162)\n  __netif_receive_skb_one_core (net/core/dev.c:6181)\n  process_backlog (net/core/dev.c:6642)\n  __napi_poll (net/core/dev.c:7710)\n  net_rx_action (net/core/dev.c:7945)\n  handle_softirqs (kernel/softirq.c:622)","epss":{"date":"2026-11-06","percentile":0.0285,"score":0.00133},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793979778901,"publishedAt":1779873880805,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/cb833bbc1b3c51e08652d3c86298307c07d3f2db"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/26900306a5a2c3e4f75c643a064525526bb6e5f3"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/0694618cf3e9b120666e31f5f383a6e466d95a0d"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/8def8fbd23f40e945febe913d04b731012ce0082"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/c55940895245d8ef658ab381248a28755218d625"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/fb965b1cfe92b28d28b5ebe3116b81dbef9f2d2f"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/9a05e195618a6d474f2bcd5b6376d0ffc2f00366"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/2195574dc6d9017d32ac346987e12659f931d932"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}],"remediation":[],"revision":"ab61f554089cd829f3693f50b245129955beb4b8dc4672c86758c88bc2a25b95","sources":[{"modifiedAt":1793979778901,"name":"CNA: Linux","retrievedAt":1793981741384,"url":"https://www.cve.org/CVERecord?id=CVE-2026-45841"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793981759285,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-45841"}],"ssvc":{"assessedAt":1793979704211,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"netfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO","updatedAt":1793981759285}