{"id":"DEBIAN-CVE-2024-33621","details":"In the Linux kernel, the following vulnerability has been resolved:  ipvlan: Dont Use skb-\u003esk in ipvlan_process_v{4,6}_outbound  Raw packet from PF_PACKET socket ontop of an IPv6-backed ipvlan device will hit WARN_ON_ONCE() in sk_mc_loop() through sch_direct_xmit() path.  WARNING: CPU: 2 PID: 0 at net/core/sock.c:775 sk_mc_loop+0x2d/0x70 Modules linked in: sch_netem ipvlan rfkill cirrus drm_shmem_helper sg drm_kms_helper CPU: 2 PID: 0 Comm: swapper/2 Kdump: loaded Not tainted 6.9.0+ #279 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 RIP: 0010:sk_mc_loop+0x2d/0x70 Code: 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 RSP: 0018:ffffa9584015cd78 EFLAGS: 00010212 RAX: 0000000000000011 RBX: ffff91e585793e00 RCX: 0000000002c6a001 RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffff91e589c0f000 RBP: ffff91e5855bd100 R08: 0000000000000000 R09: 3d00545216f43d00 R10: ffff91e584fdcc50 R11: 00000060dd8616f4 R12: ffff91e58132d000 R13: ffff91e584fdcc68 R14: ffff91e5869ce800 R15: ffff91e589c0f000 FS:  0000000000000000(0000) GS:ffff91e898100000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f788f7c44c0 CR3: 0000000008e1a000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: \u003cIRQ\u003e  ? __warn (kernel/panic.c:693)  ? sk_mc_loop (net/core/sock.c:760)  ? report_bug (lib/bug.c:201 lib/bug.c:219)  ? handle_bug (arch/x86/kernel/traps.c:239)  ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1))  ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)  ? sk_mc_loop (net/core/sock.c:760)  ip6_finish_output2 (net/ipv6/ip6_output.c:83 (discriminator 1))  ? nf_hook_slow (net/netfilter/core.c:626)  ip6_finish_output (net/ipv6/ip6_output.c:222)  ? __pfx_ip6_finish_output (net/ipv6/ip6_output.c:215)  ipvlan_xmit_mode_l3 (drivers/net/ipvlan/ipvlan_core.c:602) ipvlan  ipvlan_start_xmit (drivers/net/ipvlan/ipvlan_main.c:226) ipvlan  dev_hard_start_xmit (net/core/dev.c:3594)  sch_direct_xmit (net/sched/sch_generic.c:343)  __qdisc_run (net/sched/sch_generic.c:416)  net_tx_action (net/core/dev.c:5286)  handle_softirqs (kernel/softirq.c:555)  __irq_exit_rcu (kernel/softirq.c:589)  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043)  The warning triggers as this: packet_sendmsg    packet_snd //skb-\u003esk is packet sk       __dev_queue_xmit          __dev_xmit_skb //q-\u003eenqueue is not NULL              __qdisc_run                sch_direct_xmit                  dev_hard_start_xmit                    ipvlan_start_xmit                       ipvlan_xmit_mode_l3 //l3 mode                         ipvlan_process_outbound //vepa flag                           ipvlan_process_v6_outbound                             ip6_local_out                                 __ip6_finish_output                                   ip6_finish_output2 //multicast packet                                     sk_mc_loop //sk-\u003esk_family is AF_PACKET  Call ip{6}_local_out() with NULL sk in ipvlan as other tunnels to fix this.","modified":"2026-09-15T09:03:13.490848694Z","published":"2024-06-21T11:15:09.860Z","upstream":["CVE-2024-33621"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-33621"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.94-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-33621.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-33621.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-33621.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}