CVE-2024-33621 in Linux
Zusammenfassung
von VulDB • 15.05.2026
Im Linux-Kernel wurde folgende Schwachstelle behoben:
ipvlan: skb->sk in ipvlan_process_v{4,6}_outbound nicht verwenden
Ein Raw-Paket von einem PF_PACKET-Socket auf einem IPv6-basierten ipvlan-Gerät löst WARN_ON_ONCE() in sk_mc_loop() über den Pfad sch_direct_xmit() aus.
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 48 8b 04 25 28 00 00 00 48 8b 00 48 85 c0 74 05 48 8b 00 5d c3 0f 1f 40 00 48 8b 00 48 85 c0 74 00 5d c3 <0f> 0b 48 8b 00 48 85 c0 74 00 5d c3 0f 0b 48 8b 00 48 85 c0 74 RSP: 0018:ffffc90000077d38 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888103400000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888103400000 RBP: ffffc90000077d48 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888103400000 R13: ffff888103400000 R14: ffff888103400000 R15: ffff888103400000 FS: 0000000000000000(0000) GS:ffff888103400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f788f7c44c0 CR3: 0000000000000000 CR4: 00000000000006f0 Call Trace: <TASK> ? __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_rc
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