{"vulnerability": "CVE-2024-50256", "sightings": [{"uuid": "94367ef7-ee1a-4b2e-b4c6-9ae42c22c31d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2024-50256", "type": "seen", "source": "https://infosec.exchange/users/cve/statuses/113453136709352729", "content": "", "creation_timestamp": "2024-11-09T13:04:42.668705Z"}, {"uuid": "e1fc5cf6-a1a0-451f-9846-5bfe0bc464cd", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "c933734a-9be8-4142-889e-26e95c752803", "vulnerability": "CVE-2024-50256", "type": "seen", "source": "https://vulnerability.circl.lu/bundle/816dcc8e-f25a-4895-9b59-1bbd9caeccb8", "content": "", "creation_timestamp": "2025-12-03T14:14:49.267740Z"}, {"uuid": "4d571679-7dd5-43a6-82fc-fa83f4fc51c4", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2024-50256", "type": "seen", "source": "https://t.me/cvedetector/10315", "content": "{\n  \"Source\": \"CVE FEED\",\n  \"Title\": \"CVE-2024-50256 - Google Compute Engine Zero-Copy Tunnelling Ethernet Header Pointer Vulnerability\", \n  \"Content\": \"CVE ID : CVE-2024-50256 \nPublished : Nov. 9, 2024, 11:15 a.m. | 40\u00a0minutes ago \nDescription : In the Linux kernel, the following vulnerability has been resolved:  \n  \nnetfilter: nf_reject_ipv6: fix potential crash in nf_send_reset6()  \n  \nI got a syzbot report without a repro [1] crashing in nf_send_reset6()  \n  \nI think the issue is that dev->hard_header_len is zero, and we attempt  \nlater to push an Ethernet header.  \n  \nUse LL_MAX_HEADER, as other functions in net/ipv6/netfilter/nf_reject_ipv6.c.  \n  \n[1]  \n  \nskbuff: skb_under_panic: text:ffffffff89b1d008 len:74 put:14 head:ffff88803123aa00 data:ffff88803123a9f2 tail:0x3c end:0x140 dev:syz_tun  \n kernel BUG at net/core/skbuff.c:206 !  \nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI  \nCPU: 0 UID: 0 PID: 7373 Comm: syz.1.568 Not tainted 6.12.0-rc2-syzkaller-00631-g6d858708d465 #0  \nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024  \n RIP: 0010:skb_panic net/core/skbuff.c:206 [inline]  \n RIP: 0010:skb_under_panic+0x14b/0x150 net/core/skbuff.c:216  \nCode: 0d 8d 48 c7 c6 60 a6 29 8e 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 41 54 41 57 41 56 e8 ba 30 38 02 48 83 c4 20 90 <0f0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3  \nRSP: 0018:ffffc900045269b0 EFLAGS: 00010282  \nRAX: 0000000000000088 RBX: dffffc0000000000 RCX: cd66dacdc5d8e800  \nRDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000  \nRBP: ffff88802d39a3d0 R08: ffffffff8174afec R09: 1ffff920008a4ccc  \nR10: dffffc0000000000 R11: fffff520008a4ccd R12: 0000000000000140  \nR13: ffff88803123aa00 R14: ffff88803123a9f2 R15: 000000000000003c  \nFS:  00007fdbee5ff6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000  \nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033  \nCR2: 0000000000000000 CR3: 000000005d322000 CR4: 00000000003526f0  \nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000  \nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400  \nCall Trace:  \n   \n  skb_push+0xe5/0x100 net/core/skbuff.c:2636  \n  eth_header+0x38/0x1f0 net/ethernet/eth.c:83  \n  dev_hard_header include/linux/netdevice.h:3208 [inline]  \n  nf_send_reset6+0xce6/0x1270 net/ipv6/netfilter/nf_reject_ipv6.c:358  \n  nft_reject_inet_eval+0x3b9/0x690 net/netfilter/nft_reject_inet.c:48  \n  expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]  \n  nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288  \n  nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161  \n  nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]  \n  nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626  \n  nf_hook include/linux/netfilter.h:269 [inline]  \n  NF_HOOK include/linux/netfilter.h:312 [inline]  \n  br_nf_pre_routing_ipv6+0x63e/0x770 net/bridge/br_netfilter_ipv6.c:184  \n  nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]  \n  nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]  \n  br_handle_frame+0x9fd/0x1530 net/bridge/br_input.c:424  \n  __netif_receive_skb_core+0x13e8/0x4570 net/core/dev.c:5562  \n  __netif_receive_skb_one_core net/core/dev.c:5666 [inline]  \n  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5781  \n  netif_receive_skb_internal net/core/dev.c:5867 [inline]  \n  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5926  \n  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550  \n  tun_get_user+0x3056/0x47e0 drivers/net/tun.c:2007  \n  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053  \n  new_sync_write fs/read_write.c:590 [inline]  \n  vfs_write+0xa6d/0xc90 fs/read_write.c:683  \n  ksys_write+0x183/0x2b0 fs/read_write.c:736  \n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]  \n  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83  \n entry_SYSCALL_64_after_hwframe+0x77/0x7f  \nRIP: 0033:0x7fdbeeb7d1ff  \nCode: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05[...]", "creation_timestamp": "2024-11-09T13:17:34.000000Z"}]}