{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-53184", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-53184", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-06-25T08:38:58.189Z", "updatedAt": "2026-10-19T19:57:26.714Z", "importedAt": "2026-10-24T01:58:20.586Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "udp: clear skb->dev before running a sockmap verdict", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nudp: clear skb->dev before running a sockmap verdict\n\nOn the UDP receive path skb->dev is repurposed as dev_scratch (the\ntruesize/state cache set by udp_set_dev_scratch()), through the\nunion { struct net_device *dev; unsigned long dev_scratch; } in sk_buff.\n\nWhen a UDP socket is in a sockmap, sk_data_ready is\nsk_psock_verdict_data_ready(), which calls udp_read_skb() -> recv_actor()\n(sk_psock_verdict_recv) to run the attached SK_SKB verdict program in softirq.\nIf that program calls a socket-lookup helper (bpf_sk_lookup_tcp/udp,\nbpf_skc_lookup_tcp), bpf_skc_lookup() does:\n\n\tif (skb->dev)\n\t\tcaller_net = dev_net(skb->dev);\n\nskb->dev still holds the dev_scratch value (a non-NULL integer), so dev_net()\ndereferences it as a struct net_device * and the kernel takes a general\nprotection fault on a non-canonical address in softirq:\n\n Oops: general protection fault, probably for non-canonical address 0x1010000800004a0\n CPU: 1 UID: 0 PID: 1406 Comm: syz.2.19 Not tainted 7.1.0-rc6 #1 PREEMPT(full)\n RIP: 0010:bpf_skc_lookup net/core/filter.c:7033 [inline]\n RIP: 0010:bpf_sk_lookup+0x45/0x160 net/core/filter.c:7047\n Call Trace:\n \n bpf_prog_4675cb904b7071f8+0x12e/0x14e\n bpf_prog_run_pin_on_cpu+0xc6/0x1f0\n sk_psock_verdict_recv+0x1ba/0x350\n udp_read_skb+0x31a/0x370\n sk_psock_verdict_data_ready+0x2e3/0x600\n __udp_enqueue_schedule_skb+0x4c8/0x650\n udpv6_queue_rcv_one_skb+0x3ec/0x740\n udp6_unicast_rcv_skb+0x11d/0x140\n ip6_protocol_deliver_rcu+0x61e/0x950\n ip6_input_finish+0xa9/0x150\n NF_HOOK+0x286/0x2f0\n ip6_input+0x117/0x220\n NF_HOOK+0x286/0x2f0\n __netif_receive_skb+0x85/0x200\n process_backlog+0x374/0x9a0\n __napi_poll+0x4f/0x1c0\n net_rx_action+0x3b0/0x770\n handle_softirqs+0x15a/0x460\n do_softirq+0x57/0x80\n \n\nThe rmem charge that dev_scratch accounted for is released by skb_recv_udp() on\ndequeue, just above, so the scratch is dead by the time recv_actor() runs. Clear\nskb->dev so bpf_skc_lookup() falls back to sock_net(skb->sk), which\nskb_set_owner_sk_safe() set just above.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "965b57b469a589d64d81b1688b38dcb537011bb0", "status": "affected", "versionType": "git", "lessThan": "263779a6beff03b8b06f6d25566cb0f45af361f2" }, { "version": "965b57b469a589d64d81b1688b38dcb537011bb0", "status": "affected", "versionType": "git", "lessThan": "1b585673a2249f13678e7ac443ac683ba767e0b6" }, { "version": "965b57b469a589d64d81b1688b38dcb537011bb0", "status": "affected", "versionType": "git", "lessThan": "90d35188aaa92b8f8b23f66335e0e91bf60103a3" }, { "version": "965b57b469a589d64d81b1688b38dcb537011bb0", "status": "affected", "versionType": "git", "lessThan": "6822eed69572000a181fa4e31fceacc60918c471" }, { "version": "965b57b469a589d64d81b1688b38dcb537011bb0", "status": "affected", "versionType": "git", "lessThan": "7d6d92d000ebe3a845a17c165c1d3a70c5d84fe1" }, { "version": "965b57b469a589d64d81b1688b38dcb537011bb0", "status": "affected", "versionType": "git", "lessThan": "3c94f241f776562c489876ff506f366224565c21" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.0", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.0" }, { "version": "6.1.176", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.143", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.94", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.36", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.0.13", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.0.*" }, { "version": "7.1", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }