{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-45841", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.078Z", "datePublished": "2026-05-27T09:24:40.805Z", "dateUpdated": "2026-06-14T17:46:14.099Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-14T17:46:14.099Z" }, "descriptions": [ { "lang": "en", "value": "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 \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)" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netfilter/nfnetlink_osf.c" ], "versions": [ { "version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "cb833bbc1b3c51e08652d3c86298307c07d3f2db", "status": "affected", "versionType": "git" }, { "version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "26900306a5a2c3e4f75c643a064525526bb6e5f3", "status": "affected", "versionType": "git" }, { "version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "0694618cf3e9b120666e31f5f383a6e466d95a0d", "status": "affected", "versionType": "git" }, { "version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "8def8fbd23f40e945febe913d04b731012ce0082", "status": "affected", "versionType": "git" }, { "version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "c55940895245d8ef658ab381248a28755218d625", "status": "affected", "versionType": "git" }, { "version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "fb965b1cfe92b28d28b5ebe3116b81dbef9f2d2f", "status": "affected", "versionType": "git" }, { "version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "9a05e195618a6d474f2bcd5b6376d0ffc2f00366", "status": "affected", "versionType": "git" }, { "version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "2195574dc6d9017d32ac346987e12659f931d932", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netfilter/nfnetlink_osf.c" ], "versions": [ { "version": "2.6.31", "status": "affected" }, { "version": "0", "lessThan": "2.6.31", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.6.141" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.12.91" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.18.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "7.0.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/cb833bbc1b3c51e08652d3c86298307c07d3f2db" }, { "url": "https://git.kernel.org/stable/c/26900306a5a2c3e4f75c643a064525526bb6e5f3" }, { "url": "https://git.kernel.org/stable/c/0694618cf3e9b120666e31f5f383a6e466d95a0d" }, { "url": "https://git.kernel.org/stable/c/8def8fbd23f40e945febe913d04b731012ce0082" }, { "url": "https://git.kernel.org/stable/c/c55940895245d8ef658ab381248a28755218d625" }, { "url": "https://git.kernel.org/stable/c/fb965b1cfe92b28d28b5ebe3116b81dbef9f2d2f" }, { "url": "https://git.kernel.org/stable/c/9a05e195618a6d474f2bcd5b6376d0ffc2f00366" }, { "url": "https://git.kernel.org/stable/c/2195574dc6d9017d32ac346987e12659f931d932" } ], "title": "netfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO", "x_generator": { "engine": "bippy-1.2.0" } } } }