{ "cveId": "CVE-2026-43164", "url": "https://patchblox.com/security/cve/CVE-2026-43164", "summary": "CVE-2026-43164 is fixed in 23 products on 1 platform, first by ALAS2023-2026-1702, released May 11, 2026. It is not reported as exploited. Patch Radar priority: High.", "title": "linux: In the Linux kernel, the following vulnerability has been resolved: udplite: Fix null-ptr-deref in __udp_enqueue_sch...", "description": "In the Linux kernel, the following vulnerability has been resolved: udplite: Fix null-ptr-deref in __udp_enqueue_schedule_skb(). syzbot reported null-ptr-deref of udp_sk(sk)-\u003Eudp_prod_queue. [0] Since the cited commit, udp_lib_init_sock() can fail, as can udp_init_sock() and udpv6_init_sock(). Let\u0027s handle the error in udplite_sk_init() and udplitev6_sk_init(). [0]: BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:82 [inline] BUG: KASAN: null-ptr-deref in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] BUG: KASAN: null-ptr-deref in __udp_enqueue_schedule_skb\u002B0x151/0x1480 net/ipv4/udp.c:1719 Read of size 4 at addr 0000000000000008 by task syz.2.18/2944 CPU: 1 UID: 0 PID: 2944 Comm: syz.2.18 Not tainted syzkaller #0 PREEMPTLAZY Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: \u003CIRQ\u003E dump_stack_lvl\u002B0xe8/0x150 lib/dump_stack.c:120 kasan_report\u002B0xa2/0xe0 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range\u002B0x264/0x2c0 mm/kasan/generic.c:200 instrument_atomic_read include/linux/instrumented.h:82 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] __udp_enqueue_schedule_skb\u002B0x151/0x1480 net/ipv4/udp.c:1719 __udpv6_queue_rcv_skb net/ipv6/udp.c:795 [inline] udpv6_queue_rcv_one_skb\u002B0xa2e/0x1ad0 net/ipv6/udp.c:906 udp6_unicast_rcv_skb\u002B0x227/0x380 net/ipv6/udp.c:1064 ip6_protocol_deliver_rcu\u002B0xe17/0x1540 net/ipv6/ip6_input.c:438 ip6_input_finish\u002B0x191/0x350 net/ipv6/ip6_input.c:489 NF_HOOK\u002B0x354/0x3f0 include/linux/netfilter.h:318 ip6_input\u002B0x16c/0x2b0 net/ipv6/ip6_input.c:500 NF_HOOK\u002B0x354/0x3f0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6149 [inline] __netif_receive_skb\u002B0xd3/0x370 net/core/dev.c:6262 process_backlog\u002B0x4d6/0x1160 net/core/dev.c:6614 __napi_poll\u002B0xae/0x320 net/core/dev.c:7678 napi_poll net/core/dev.c:7741 [inline] net_rx_action\u002B0x60d/0xdc0 net/core/dev.c:7893 handle_softirqs\u002B0x209/0x8d0 kernel/softirq.c:622 do_softirq\u002B0x52/0x90 kernel/softirq.c:523 \u003C/IRQ\u003E \u003CTASK\u003E __local_bh_enable_ip\u002B0xe7/0x120 kernel/softirq.c:450 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:924 [inline] __dev_queue_xmit\u002B0x109c/0x2dc0 net/core/dev.c:4856 __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline] ip6_finish_output\u002B0x158/0x4e0 net/ipv6/ip6_output.c:219 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output\u002B0x342/0x580 net/ipv6/ip6_output.c:246 ip6_send_skb\u002B0x1d7/0x3c0 net/ipv6/ip6_output.c:1984 udp_v6_send_skb\u002B0x9a5/0x1770 net/ipv6/udp.c:1442 udp_v6_push_pending_frames\u002B0xa2/0x140 net/ipv6/udp.c:1469 udpv6_sendmsg\u002B0xfe0/0x2830 net/ipv6/udp.c:1759 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg\u002B0xe5/0x270 net/socket.c:742 __sys_sendto\u002B0x3eb/0x580 net/socket.c:2206 __do_sys_sendto net/socket.c:2213 [inline] __se_sys_sendto net/socket.c:2209 [inline] __x64_sys_sendto\u002B0xde/0x100 net/socket.c:2209 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64\u002B0xd2/0xf20 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe\u002B0x76/0x7e RIP: 0033:0x7f67b4d9c629 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003C48\u003E 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f67b5c98028 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f67b5015fa0 RCX: 00007f67b4d9c629 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f67b4e32b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000040000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f67b5016038 R14: 00007f67b5015fa0 R15: 00007ffe3cb66dd8 \u003C/TASK\u003E", "published": "2026-05-06T12:16:34Z", "severity": "high", "cvss": 7.5, "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "epss": 0.00451, "epssPercentile": 0.39433, "priority": "High", "priorityTier": 3, "exploited": false, "vendorExploited": false, "disclosed": false, "fixes": [ { "platform": "linux", "product": "bpftool6.18", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "bpftool6.18-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel-livepatch-6.18.16-18.222", "release": "amzn 2023", "fixedVersion": "1:1.0-0.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-debuginfo-common-aarch64", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-debuginfo-common-x86_64", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-devel", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-headers", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-libbpf", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-libbpf-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-libbpf-devel", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-libbpf-static", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-modules-extra", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-modules-extra-common", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-tools", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-tools-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "kernel6.18-tools-devel", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "linux", "release": "Debian 14", "fixedVersion": "6.19.6-1", "fix": "DEBIAN-CVE-2026-43164", "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43164", "released": "2026-05-15T16:01:09Z" }, { "platform": "linux", "product": "perf6.18", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "perf6.18-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "python3-perf6.18", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" }, { "platform": "linux", "product": "python3-perf6.18-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.18.16-18.222.amzn2023", "fix": "ALAS2023-2026-1702", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1702", "released": "2026-05-11T09:00:00Z" } ], "noFixYet": [], "dataAsOf": "2026-11-09T01:18:40Z", "attribution": { "text": "Data: Patchblox Patch Radar", "url": "https://patchblox.com/security/patch-radar", "terms": "https://patchblox.com/security/patch-radar/use-the-data" } }