{"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": "2026-05-27T09:24:40.805Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T09:24:40.805Z"}, "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 <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)"}], "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": "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": "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-rc1", "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": "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-rc1"}]}]}], "references": [{"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"}}}}

{}

{"cveTags": [], "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 <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)"}], "id": "CVE-2026-45841", "lastModified": "2026-05-27T14:48:03.013", "metrics": {}, "published": "2026-05-27T11:16:23.493", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2195574dc6d9017d32ac346987e12659f931d932"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8def8fbd23f40e945febe913d04b731012ce0082"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9a05e195618a6d474f2bcd5b6376d0ffc2f00366"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c55940895245d8ef658ab381248a28755218d625"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fb965b1cfe92b28d28b5ebe3116b81dbef9f2d2f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,8def8fbd23f40e945febe913d04b731012ce0082)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,c55940895245d8ef658ab381248a28755218d625)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,fb965b1cfe92b28d28b5ebe3116b81dbef9f2d2f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,9a05e195618a6d474f2bcd5b6376d0ffc2f00366)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,2195574dc6d9017d32ac346987e12659f931d932)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.31"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.31)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.141,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.91,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.33,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0.10,7.0.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-27T11:45:15.404593+00:00", "updated": "2026-05-27T13:00:11.829240+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-369", "CWE-190"]}