{
  "threat_severity" : "Moderate",
  "public_date" : "2025-12-24T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: Linux kernel UDPLITE: Denial of Service via null pointer dereference",
    "id" : "2424964",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2424964"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-476",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nudplite: Fix NULL pointer dereference in __sk_mem_raise_allocated().\nsyzbot reported [0] a null-ptr-deref in sk_get_rmem0() while using\nIPPROTO_UDPLITE (0x88):\n14:25:52 executing program 1:\nr0 = socket$inet6(0xa, 0x80002, 0x88)\nWe had a similar report [1] for probably sk_memory_allocated_add()\nin __sk_mem_raise_allocated(), and commit c915fe13cbaa (\"udplite: fix\nNULL pointer dereference\") fixed it by setting .memory_allocated for\nudplite_prot and udplitev6_prot.\nTo fix the variant, we need to set either .sysctl_wmem_offset or\n.sysctl_rmem.\nNow UDP and UDPLITE share the same value for .memory_allocated, so we\nuse the same .sysctl_wmem_offset for UDP and UDPLITE.\n[0]:\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 0 PID: 6829 Comm: syz-executor.1 Not tainted 6.4.0-rc2-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023\nRIP: 0010:sk_get_rmem0 include/net/sock.h:2907 [inline]\nRIP: 0010:__sk_mem_raise_allocated+0x806/0x17a0 net/core/sock.c:3006\nCode: c1 ea 03 80 3c 02 00 0f 85 23 0f 00 00 48 8b 44 24 08 48 8b 98 38 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 0f 8d 6f 0a 00 00 8b\nRSP: 0018:ffffc90005d7f450 EFLAGS: 00010246\nRAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90004d92000\nRDX: 0000000000000000 RSI: ffffffff88066482 RDI: ffffffff8e2ccbb8\nRBP: ffff8880173f7000 R08: 0000000000000005 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000000 R12: 0000000000030000\nR13: 0000000000000001 R14: 0000000000000340 R15: 0000000000000001\nFS:  0000000000000000(0000) GS:ffff8880b9800000(0063) knlGS:00000000f7f1cb40\nCS:  0010 DS: 002b ES: 002b CR0: 0000000080050033\nCR2: 000000002e82f000 CR3: 0000000034ff0000 CR4: 00000000003506f0\nCall Trace:\n<TASK>\n__sk_mem_schedule+0x6c/0xe0 net/core/sock.c:3077\nudp_rmem_schedule net/ipv4/udp.c:1539 [inline]\n__udp_enqueue_schedule_skb+0x776/0xb30 net/ipv4/udp.c:1581\n__udpv6_queue_rcv_skb net/ipv6/udp.c:666 [inline]\nudpv6_queue_rcv_one_skb+0xc39/0x16c0 net/ipv6/udp.c:775\nudpv6_queue_rcv_skb+0x194/0xa10 net/ipv6/udp.c:793\n__udp6_lib_mcast_deliver net/ipv6/udp.c:906 [inline]\n__udp6_lib_rcv+0x1bda/0x2bd0 net/ipv6/udp.c:1013\nip6_protocol_deliver_rcu+0x2e7/0x1250 net/ipv6/ip6_input.c:437\nip6_input_finish+0x150/0x2f0 net/ipv6/ip6_input.c:482\nNF_HOOK include/linux/netfilter.h:303 [inline]\nNF_HOOK include/linux/netfilter.h:297 [inline]\nip6_input+0xa0/0xd0 net/ipv6/ip6_input.c:491\nip6_mc_input+0x40b/0xf50 net/ipv6/ip6_input.c:585\ndst_input include/net/dst.h:468 [inline]\nip6_rcv_finish net/ipv6/ip6_input.c:79 [inline]\nNF_HOOK include/linux/netfilter.h:303 [inline]\nNF_HOOK include/linux/netfilter.h:297 [inline]\nipv6_rcv+0x250/0x380 net/ipv6/ip6_input.c:309\n__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5491\n__netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5605\nnetif_receive_skb_internal net/core/dev.c:5691 [inline]\nnetif_receive_skb+0x133/0x7a0 net/core/dev.c:5750\ntun_rx_batched+0x4b3/0x7a0 drivers/net/tun.c:1553\ntun_get_user+0x2452/0x39c0 drivers/net/tun.c:1989\ntun_chr_write_iter+0xdf/0x200 drivers/net/tun.c:2035\ncall_write_iter include/linux/fs.h:1868 [inline]\nnew_sync_write fs/read_write.c:491 [inline]\nvfs_write+0x945/0xd50 fs/read_write.c:584\nksys_write+0x12b/0x250 fs/read_write.c:637\ndo_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]\n__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178\ndo_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203\nentry_SYSENTER_compat_after_hwframe+0x70/0x82\nRIP: 0023:0xf7f21579\nCode: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00\n---truncated---", "A flaw was found in the Linux kernel's UDPLITE (UDP-Lite) implementation. A local user can exploit a null pointer dereference in the `__sk_mem_raise_allocated()` function by using the `IPPROTO_UDPLITE` protocol. This vulnerability can lead to a system crash, resulting in a denial of service (DoS)." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-05-22T00:00:00Z",
    "advisory" : "RHSA-2024:3138",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-11-07T00:00:00Z",
    "advisory" : "RHSA-2023:6583",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-362.8.1.el9_3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-11-07T00:00:00Z",
    "advisory" : "RHSA-2023:6583",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-362.8.1.el9_3"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2023-54004\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-54004\nhttps://lore.kernel.org/linux-cve-announce/2025122428-CVE-2023-54004-34a0@gregkh/T" ],
  "name" : "CVE-2023-54004",
  "csaw" : false
}