{"id":"CVE-2024-33621","state":"PUBLISHED","title":"ipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound\n\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.\n\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)\n ip6_finish_output2 (net/ipv6/ip6_output.c:83 (discriminator 1))\n ? nf_hook_slow (net/netfilter/core.c:626)\n ip6_finish_output (net/ipv6/ip6_output.c:222)\n ? __pfx_ip6_finish_output (net/ipv6/ip6_output.c:215)\n ipvlan_xmit_mode_l3 (drivers/net/ipvlan/ipvlan_core.c:602) ipvlan\n ipvlan_start_xmit (drivers/net/ipvlan/ipvlan_main.c:226) ipvlan\n dev_hard_start_xmit (net/core/dev.c:3594)\n sch_direct_xmit (net/sched/sch_generic.c:343)\n __qdisc_run (net/sched/sch_generic.c:416)\n net_tx_action (net/core/dev.c:5286)\n handle_softirqs (kernel/softirq.c:555)\n __irq_exit_rcu (kernel/softirq.c:589)\n sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043)\n\nThe warning triggers as this:\npacket_sendmsg\n   packet_snd //skb->sk is packet sk\n      __dev_queue_xmit\n         __dev_xmit_skb //q->enqueue is not NULL\n             __qdisc_run\n               sch_direct_xmit\n                 dev_hard_start_xmit\n                   ipvlan_start_xmit\n                      ipvlan_xmit_mode_l3 //l3 mode\n                        ipvlan_process_outbound //vepa flag\n                          ipvlan_process_v6_outbound\n                            ip6_local_out\n                                __ip6_finish_output\n                                  ip6_finish_output2 //multicast packet\n                                    sk_mc_loop //sk->sk_family is AF_PACKET\n\nCall ip{6}_local_out() with NULL sk in ipvlan as other tunnels to fix this.","publishedAt":"2024-06-21T10:18:05.673Z","updatedAt":"2026-10-15T00:40:42.015Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"0049a623dfbbb49888de7f0c2f33a582b5ead989","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"54768bacfde60e8e4757968d79f8726711dd2cf5","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"1abbf079da59ef559d0ab4219d2a0302f7970761","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"183c4b416454b9983dc1b8aa0022b748911adc48","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"cb53706a3403ba67f4040b2a82d9cf79e11b1a48","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"54213c09801e0bd2549ac42961093be36f65a7d0","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"13c4543db34e0da5a7d2f550b6262d860f248381","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"b3dc6e8003b500861fa307e9a3400c52e78e4d3a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ipvlan/ipvlan_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.19","versionType":"semver"},{"version":"4.19.316","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.278","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.219","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.161","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.93","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.33","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.9.4","status":"unaffected","lessThanOrEqual":"6.9.*","versionType":"semver"},{"version":"6.10","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ipvlan/ipvlan_core.c"]}],"references":["https://git.kernel.org/stable/c/0049a623dfbbb49888de7f0c2f33a582b5ead989","https://git.kernel.org/stable/c/54768bacfde60e8e4757968d79f8726711dd2cf5","https://git.kernel.org/stable/c/1abbf079da59ef559d0ab4219d2a0302f7970761","https://git.kernel.org/stable/c/183c4b416454b9983dc1b8aa0022b748911adc48","https://git.kernel.org/stable/c/cb53706a3403ba67f4040b2a82d9cf79e11b1a48","https://git.kernel.org/stable/c/54213c09801e0bd2549ac42961093be36f65a7d0","https://git.kernel.org/stable/c/13c4543db34e0da5a7d2f550b6262d860f248381","https://git.kernel.org/stable/c/b3dc6e8003b500861fa307e9a3400c52e78e4d3a","https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","https://cert-portal.siemens.com/productcert/html/ssa-398330.html","https://cert-portal.siemens.com/productcert/html/ssa-265688.html","https://cert-portal.siemens.com/productcert/html/ssa-613116.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:30.303Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/33xxx/CVE-2024-33621.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-33621","state":"PUBLISHED","datePublished":"2024-06-21T10:18:05.673Z","dateUpdated":"2026-10-15T00:40:42.015Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-06-21T10:13:16.298Z"},"containers":{"cna":{"title":"ipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound\n\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.\n\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)\n ip6_finish_output2 (net/ipv6/ip6_output.c:83 (discriminator 1))\n ? nf_hook_slow (net/netfilter/core.c:626)\n ip6_finish_output (net/ipv6/ip6_output.c:222)\n ? __pfx_ip6_finish_output (net/ipv6/ip6_output.c:215)\n ipvlan_xmit_mode_l3 (drivers/net/ipvlan/ipvlan_core.c:602) ipvlan\n ipvlan_start_xmit (drivers/net/ipvlan/ipvlan_main.c:226) ipvlan\n dev_hard_start_xmit (net/core/dev.c:3594)\n sch_direct_xmit (net/sched/sch_generic.c:343)\n __qdisc_run (net/sched/sch_generic.c:416)\n net_tx_action (net/core/dev.c:5286)\n handle_softirqs (kernel/softirq.c:555)\n __irq_exit_rcu (kernel/softirq.c:589)\n sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043)\n\nThe warning triggers as this:\npacket_sendmsg\n   packet_snd //skb->sk is packet sk\n      __dev_queue_xmit\n         __dev_xmit_skb //q->enqueue is not NULL\n             __qdisc_run\n               sch_direct_xmit\n                 dev_hard_start_xmit\n                   ipvlan_start_xmit\n                      ipvlan_xmit_mode_l3 //l3 mode\n                        ipvlan_process_outbound //vepa flag\n                          ipvlan_process_v6_outbound\n                            ip6_local_out\n                                __ip6_finish_output\n                                  ip6_finish_output2 //multicast packet\n                                    sk_mc_loop //sk->sk_family is AF_PACKET\n\nCall ip{6}_local_out() with NULL sk in ipvlan as other tunnels to fix this."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"0049a623dfbbb49888de7f0c2f33a582b5ead989","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"54768bacfde60e8e4757968d79f8726711dd2cf5","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"1abbf079da59ef559d0ab4219d2a0302f7970761","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"183c4b416454b9983dc1b8aa0022b748911adc48","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"cb53706a3403ba67f4040b2a82d9cf79e11b1a48","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"54213c09801e0bd2549ac42961093be36f65a7d0","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"13c4543db34e0da5a7d2f550b6262d860f248381","versionType":"git"},{"version":"2ad7bf3638411cb547f2823df08166c13ab04269","status":"affected","lessThan":"b3dc6e8003b500861fa307e9a3400c52e78e4d3a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ipvlan/ipvlan_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.19","versionType":"semver"},{"version":"4.19.316","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.278","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.219","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.161","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.93","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.33","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.9.4","status":"unaffected","lessThanOrEqual":"6.9.*","versionType":"semver"},{"version":"6.10","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ipvlan/ipvlan_core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0049a623dfbbb49888de7f0c2f33a582b5ead989"},{"url":"https://git.kernel.org/stable/c/54768bacfde60e8e4757968d79f8726711dd2cf5"},{"url":"https://git.kernel.org/stable/c/1abbf079da59ef559d0ab4219d2a0302f7970761"},{"url":"https://git.kernel.org/stable/c/183c4b416454b9983dc1b8aa0022b748911adc48"},{"url":"https://git.kernel.org/stable/c/cb53706a3403ba67f4040b2a82d9cf79e11b1a48"},{"url":"https://git.kernel.org/stable/c/54213c09801e0bd2549ac42961093be36f65a7d0"},{"url":"https://git.kernel.org/stable/c/13c4543db34e0da5a7d2f550b6262d860f248381"},{"url":"https://git.kernel.org/stable/c/b3dc6e8003b500861fa307e9a3400c52e78e4d3a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:10:52.354Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"4.19.316"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"5.4.278"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"5.10.219"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"5.15.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.1.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.6.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.9.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.10"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE 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