{"id":"CVE-2024-47685","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()\n\nsyzbot reported that nf_reject_ip6_tcphdr_put() was possibly sending\ngarbage on the four reserved tcp bits (t…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()\n\nsyzbot reported that nf_reject_ip6_tcphdr_put() was possibly sending\ngarbage on the four reserved tcp bits (t…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","cwe":["CWE-908"],"vendor":"debian","product":"debian_linux","affected":["debian_linux = 11.0","linux_kernel >= 3.18, < 4.19.323","linux_kernel >= 4.20, < 5.4.285","linux_kernel >= 5.5, < 5.10.227","linux_kernel >= 5.11, < 5.15.168","linux_kernel >= 5.16, < 6.1.113","linux_kernel >= 6.2, < 6.6.54","linux_kernel >= 6.7, < 6.10.13","linux_kernel >= 6.11, < 6.11.2"],"patched":["linux_kernel 6.11.2"],"published":"2024-10-21","updated":"2026-10-15","sourceUpdated":"2026-10-15T01:18:54.440","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-47685","references":[{"url":"https://git.kernel.org/stable/c/10210658f827ad45061581cbfc05924b723e8922","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7a7b5a27c53b55e91eecf646d1b204e73fa4af93","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7bcbc4cda777d26c88500d973fad0d497fc8a82e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7ea2bcfd9bf4c3dbbf22546162226fd1c14d8ad2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/872eca64c3267dbc5836b715716fc6c03a18eda7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9c778fe48d20ef362047e3376dee56d77f8500d4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/af4b8a704f26f38310655bad67fd8096293275a2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dcf48ab3ca2c55b09c8f9c8de0df01c1943bc4e5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fbff87d682e57ddbbe82abf6d0a1a4a36a98afcd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-355557.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.01369,"epssPercentile":0.71334,"ingestedAt":"2026-10-15T03:30:12.745Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2024-10-21T13:06:45.955918Z"},"slug":"CVE-2024-47685","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()\n\nsyzbot reported that nf_reject_ip6_tcphdr_put() was possibly sending\ngarbage on the four reserved tcp bits (th->res1)\n\nUse skb_put_zero() to clear the whole TCP header,\nas done in nf_reject_ip_tcphdr_put()\n\nBUG: KMSAN: uninit-value in nf_reject_ip6_tcphdr_put+0x688/0x6c0 net/ipv6/netfilter/nf_reject_ipv6.c:255\n  nf_reject_ip6_tcphdr_put+0x688/0x6c0 net/ipv6/netfilter/nf_reject_ipv6.c:255\n  nf_send_reset6+0xd84/0x15b0 net/ipv6/netfilter/nf_reject_ipv6.c:344\n  nft_reject_inet_eval+0x3c1/0x880 net/netfilter/nft_reject_inet.c:48\n  expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]\n  nft_do_chain+0x438/0x22a0 net/netfilter/nf_tables_core.c:288\n  nft_do_chain_inet+0x41a/0x4f0 net/netfilter/nft_chain_filter.c:161\n  nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]\n  nf_hook_slow+0xf4/0x400 net/netfilter/core.c:626\n  nf_hook include/linux/netfilter.h:269 [inline]\n  NF_HOOK include/linux/netfilter.h:312 [inline]\n  ipv6_rcv+0x29b/0x390 net/ipv6/ip6_input.c:310\n  __netif_receive_skb_one_core net/core/dev.c:5661 [inline]\n  __netif_receive_skb+0x1da/0xa00 net/core/dev.c:5775\n  process_backlog+0x4ad/0xa50 net/core/dev.c:6108\n  __napi_poll+0xe7/0x980 net/core/dev.c:6772\n  napi_poll net/core/dev.c:6841 [inline]\n  net_rx_action+0xa5a/0x19b0 net/core/dev.c:6963\n  handle_softirqs+0x1ce/0x800 kernel/softirq.c:554\n  __do_softirq+0x14/0x1a kernel/softirq.c:588\n  do_softirq+0x9a/0x100 kernel/softirq.c:455\n  __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:382\n  local_bh_enable include/linux/bottom_half.h:33 [inline]\n  rcu_read_unlock_bh include/linux/rcupdate.h:908 [inline]\n  __dev_queue_xmit+0x2692/0x5610 net/core/dev.c:4450\n  dev_queue_xmit include/linux/netdevice.h:3105 [inline]\n  neigh_resolve_output+0x9ca/0xae0 net/core/neighbour.c:1565\n  neigh_output include/net/neighbour.h:542 [inline]\n  ip6_finish_output2+0x2347/0x2ba0 net/ipv6/ip6_output.c:141\n  __ip6_finish_output net/ipv6/ip6_output.c:215 [inline]\n  ip6_finish_output+0xbb8/0x14b0 net/ipv6/ip6_output.c:226\n  NF_HOOK_COND include/linux/netfilter.h:303 [inline]\n  ip6_output+0x356/0x620 net/ipv6/ip6_output.c:247\n  dst_output include/net/dst.h:450 [inline]\n  NF_HOOK include/linux/netfilter.h:314 [inline]\n  ip6_xmit+0x1ba6/0x25d0 net/ipv6/ip6_output.c:366\n  inet6_csk_xmit+0x442/0x530 net/ipv6/inet6_connection_sock.c:135\n  __tcp_transmit_skb+0x3b07/0x4880 net/ipv4/tcp_output.c:1466\n  tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]\n  tcp_connect+0x35b6/0x7130 net/ipv4/tcp_output.c:4143\n  tcp_v6_connect+0x1bcc/0x1e40 net/ipv6/tcp_ipv6.c:333\n  __inet_stream_connect+0x2ef/0x1730 net/ipv4/af_inet.c:679\n  inet_stream_connect+0x6a/0xd0 net/ipv4/af_inet.c:750\n  __sys_connect_file net/socket.c:2061 [inline]\n  __sys_connect+0x606/0x690 net/socket.c:2078\n  __do_sys_connect net/socket.c:2088 [inline]\n  __se_sys_connect net/socket.c:2085 [inline]\n  __x64_sys_connect+0x91/0xe0 net/socket.c:2085\n  x64_sys_call+0x27a5/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:43\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nUninit was stored to memory at:\n  nf_reject_ip6_tcphdr_put+0x60c/0x6c0 net/ipv6/netfilter/nf_reject_ipv6.c:249\n  nf_send_reset6+0xd84/0x15b0 net/ipv6/netfilter/nf_reject_ipv6.c:344\n  nft_reject_inet_eval+0x3c1/0x880 net/netfilter/nft_reject_inet.c:48\n  expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]\n  nft_do_chain+0x438/0x22a0 net/netfilter/nf_tables_core.c:288\n  nft_do_chain_inet+0x41a/0x4f0 net/netfilter/nft_chain_filter.c:161\n  nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]\n  nf_hook_slow+0xf4/0x400 net/netfilter/core.c:626\n  nf_hook include/linux/netfilter.h:269 [inline]\n  NF_HOOK include/linux/netfilter.h:312 [inline]\n  ipv6_rcv+0x29b/0x390 net/ipv6/ip6_input.c:310\n  __netif_receive_skb_one_core\n---truncated---\n\n## Affected\n\n- `debian_linux = 11.0`\n- `linux_kernel >= 3.18, < 4.19.323`\n- `linux_kernel >= 4.20, < 5.4.285`\n- `linux_kernel >= 5.5, < 5.10.227`\n- `linux_kernel >= 5.11, < 5.15.168`\n- `linux_kernel >= 5.16, < 6.1.113`\n- `linux_kernel >= 6.2, < 6.6.54`\n- `linux_kernel >= 6.7, < 6.10.13`\n- `linux_kernel >= 6.11, < 6.11.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.11.2`","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}