{
  "threat_severity" : "Low",
  "public_date" : "2024-06-21T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: ipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound",
    "id" : "2293657",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2293657"
  },
  "cvss3" : {
    "cvss3_base_score" : "2.3",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L",
    "status" : "verified"
  },
  "cwe" : "CWE-20",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound\nRaw packet from PF_PACKET socket ontop of an IPv6-backed ipvlan device will\nhit WARN_ON_ONCE() in sk_mc_loop() through sch_direct_xmit() path.\nWARNING: CPU: 2 PID: 0 at net/core/sock.c:775 sk_mc_loop+0x2d/0x70\nModules linked in: sch_netem ipvlan rfkill cirrus drm_shmem_helper sg drm_kms_helper\nCPU: 2 PID: 0 Comm: swapper/2 Kdump: loaded Not tainted 6.9.0+ #279\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nRIP: 0010:sk_mc_loop+0x2d/0x70\nCode: fa 0f 1f 44 00 00 65 0f b7 15 f7 96 a3 4f 31 c0 66 85 d2 75 26 48 85 ff 74 1c\nRSP: 0018:ffffa9584015cd78 EFLAGS: 00010212\nRAX: 0000000000000011 RBX: ffff91e585793e00 RCX: 0000000002c6a001\nRDX: 0000000000000000 RSI: 0000000000000040 RDI: ffff91e589c0f000\nRBP: ffff91e5855bd100 R08: 0000000000000000 R09: 3d00545216f43d00\nR10: ffff91e584fdcc50 R11: 00000060dd8616f4 R12: ffff91e58132d000\nR13: ffff91e584fdcc68 R14: ffff91e5869ce800 R15: ffff91e589c0f000\nFS:  0000000000000000(0000) GS:ffff91e898100000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f788f7c44c0 CR3: 0000000008e1a000 CR4: 00000000000006f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n<IRQ>\n? __warn (kernel/panic.c:693)\n? sk_mc_loop (net/core/sock.c:760)\n? report_bug (lib/bug.c:201 lib/bug.c:219)\n? handle_bug (arch/x86/kernel/traps.c:239)\n? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1))\n? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)\n? sk_mc_loop (net/core/sock.c:760)\nip6_finish_output2 (net/ipv6/ip6_output.c:83 (discriminator 1))\n? nf_hook_slow (net/netfilter/core.c:626)\nip6_finish_output (net/ipv6/ip6_output.c:222)\n? __pfx_ip6_finish_output (net/ipv6/ip6_output.c:215)\nipvlan_xmit_mode_l3 (drivers/net/ipvlan/ipvlan_core.c:602) ipvlan\nipvlan_start_xmit (drivers/net/ipvlan/ipvlan_main.c:226) ipvlan\ndev_hard_start_xmit (net/core/dev.c:3594)\nsch_direct_xmit (net/sched/sch_generic.c:343)\n__qdisc_run (net/sched/sch_generic.c:416)\nnet_tx_action (net/core/dev.c:5286)\nhandle_softirqs (kernel/softirq.c:555)\n__irq_exit_rcu (kernel/softirq.c:589)\nsysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043)\nThe warning triggers as this:\npacket_sendmsg\npacket_snd //skb->sk is packet sk\n__dev_queue_xmit\n__dev_xmit_skb //q->enqueue is not NULL\n__qdisc_run\nsch_direct_xmit\ndev_hard_start_xmit\nipvlan_start_xmit\nipvlan_xmit_mode_l3 //l3 mode\nipvlan_process_outbound //vepa flag\nipvlan_process_v6_outbound\nip6_local_out\n__ip6_finish_output\nip6_finish_output2 //multicast packet\nsk_mc_loop //sk->sk_family is AF_PACKET\nCall ip{6}_local_out() with NULL sk in ipvlan as other tunnels to fix this." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-08-08T00:00:00Z",
    "advisory" : "RHSA-2024:5102",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.16.1.rt7.357.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-08-08T00:00:00Z",
    "advisory" : "RHSA-2024:5101",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.16.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "release_date" : "2024-08-07T00:00:00Z",
    "advisory" : "RHSA-2024:5065",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.6",
    "package" : "kernel-0:4.18.0-372.115.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Telecommunications Update Service",
    "release_date" : "2024-08-07T00:00:00Z",
    "advisory" : "RHSA-2024:5065",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.6",
    "package" : "kernel-0:4.18.0-372.115.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions",
    "release_date" : "2024-08-07T00:00:00Z",
    "advisory" : "RHSA-2024:5065",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.6",
    "package" : "kernel-0:4.18.0-372.115.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Extended Update Support",
    "release_date" : "2024-09-03T00:00:00Z",
    "advisory" : "RHSA-2024:6206",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.8",
    "package" : "kernel-0:4.18.0-477.70.1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-08-15T00:00:00Z",
    "advisory" : "RHSA-2024:5363",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.31.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-08-15T00:00:00Z",
    "advisory" : "RHSA-2024:5363",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.31.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2024-08-07T00:00:00Z",
    "advisory" : "RHSA-2024:5066",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2",
    "package" : "kernel-0:5.14.0-284.77.1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2024-08-07T00:00:00Z",
    "advisory" : "RHSA-2024:5067",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2::nfv",
    "package" : "kernel-rt-0:5.14.0-284.77.1.rt14.362.el9_2"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2024-33621\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-33621\nhttps://lore.kernel.org/linux-cve-announce/2024062134-CVE-2024-33621-d3a6@gregkh/T" ],
  "name" : "CVE-2024-33621",
  "csaw" : false
}