CVE-2024-47685

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put() syzbot reported that nf_reject_ip6_tcphdr_put() was possibly sending garbage on the four reserved tcp bits (th->res1) Use skb_put_zero() to clear the whole TCP header, as done in nf_reject_ip_tcphdr_put() BUG: KMSAN: uninit-value in nf_reject_ip6_tcphdr_put+0x688/0x6c0 net/ipv6/netfilter/nf_reject_ipv6.c:255 nf_reject_ip6_tcphdr_put+0x688/0x6c0 net/ipv6/netfilter/nf_reject_ipv6.c:255 nf_send_reset6+0xd84/0x15b0 net/ipv6/netfilter/nf_reject_ipv6.c:344 nft_reject_inet_eval+0x3c1/0x880 net/netfilter/nft_reject_inet.c:48 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline] nft_do_chain+0x438/0x22a0 net/netfilter/nf_tables_core.c:288 nft_do_chain_inet+0x41a/0x4f0 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xf4/0x400 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK include/linux/netfilter.h:312 [inline] ipv6_rcv+0x29b/0x390 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core net/core/dev.c:5661 [inline] __netif_receive_skb+0x1da/0xa00 net/core/dev.c:5775 process_backlog+0x4ad/0xa50 net/core/dev.c:6108 __napi_poll+0xe7/0x980 net/core/dev.c:6772 napi_poll net/core/dev.c:6841 [inline] net_rx_action+0xa5a/0x19b0 net/core/dev.c:6963 handle_softirqs+0x1ce/0x800 kernel/softirq.c:554 __do_softirq+0x14/0x1a kernel/softirq.c:588 do_softirq+0x9a/0x100 kernel/softirq.c:455 __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:382 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:908 [inline] __dev_queue_xmit+0x2692/0x5610 net/core/dev.c:4450 dev_queue_xmit include/linux/netdevice.h:3105 [inline] neigh_resolve_output+0x9ca/0xae0 net/core/neighbour.c:1565 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0x2347/0x2ba0 net/ipv6/ip6_output.c:141 __ip6_finish_output net/ipv6/ip6_output.c:215 [inline] ip6_finish_output+0xbb8/0x14b0 net/ipv6/ip6_output.c:226 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x356/0x620 net/ipv6/ip6_output.c:247 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ip6_xmit+0x1ba6/0x25d0 net/ipv6/ip6_output.c:366 inet6_csk_xmit+0x442/0x530 net/ipv6/inet6_connection_sock.c:135 __tcp_transmit_skb+0x3b07/0x4880 net/ipv4/tcp_output.c:1466 tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline] tcp_connect+0x35b6/0x7130 net/ipv4/tcp_output.c:4143 tcp_v6_connect+0x1bcc/0x1e40 net/ipv6/tcp_ipv6.c:333 __inet_stream_connect+0x2ef/0x1730 net/ipv4/af_inet.c:679 inet_stream_connect+0x6a/0xd0 net/ipv4/af_inet.c:750 __sys_connect_file net/socket.c:2061 [inline] __sys_connect+0x606/0x690 net/socket.c:2078 __do_sys_connect net/socket.c:2088 [inline] __se_sys_connect net/socket.c:2085 [inline] __x64_sys_connect+0x91/0xe0 net/socket.c:2085 x64_sys_call+0x27a5/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:43 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: nf_reject_ip6_tcphdr_put+0x60c/0x6c0 net/ipv6/netfilter/nf_reject_ipv6.c:249 nf_send_reset6+0xd84/0x15b0 net/ipv6/netfilter/nf_reject_ipv6.c:344 nft_reject_inet_eval+0x3c1/0x880 net/netfilter/nft_reject_inet.c:48 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline] nft_do_chain+0x438/0x22a0 net/netfilter/nf_tables_core.c:288 nft_do_chain_inet+0x41a/0x4f0 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xf4/0x400 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK include/linux/netfilter.h:312 [inline] ipv6_rcv+0x29b/0x390 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core ---truncated---

CVSS Metrics

• v3.1•CRITICAL•Score: 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS Trends

Current EPSS score: 1.37%• Percentile: 71%

Techniques & Countermeasures

• CWE-908•Use of Uninitialized Resource

  The product uses or accesses a resource that has not been initialized.

Affected Systems

• debian•linux

  < 5.10.234-1 | < 6.1.115-1 | < 6.11.2-1 | < 6.11.2-1

• debian•linux-6.1

  < 6.1.119-1~deb11u1

• ubuntu•linux

  < 4.4.0-272.306 | < 4.15.0-241.253 | < 5.4.0-208.228 | < 5.15.0-127.137 | < 6.8.0-54.56

• ubuntu•linux-allwinner-5.19

  all

• ubuntu•linux-aws

  < 4.4.0-1147.153 | < 4.4.0-1185.200 | < 4.15.0-1184.197 | < 5.4.0-1140.150 | < 5.15.0-1073.79 | < 6.8.0-1023.25

• ubuntu•linux-aws-5.0

  all

• ubuntu•linux-aws-5.11

  all

• ubuntu•linux-aws-5.13

  all

• ubuntu•linux-aws-5.15

  < 5.15.0-1073.79~20.04.1

• ubuntu•linux-aws-5.19

  all

• ubuntu•linux-aws-5.3

  all

• ubuntu•linux-aws-5.4

  < 5.4.0-1142.152~18.04.1

• ubuntu•linux-aws-5.8

  all

• ubuntu•linux-aws-6.2

  all

• ubuntu•linux-aws-6.5

  all

• ubuntu•linux-aws-6.8

  < 6.8.0-1023.25~22.04.1

• ubuntu•linux-aws-fips

  < 4.15.0-2122.128 | all | < 5.4.0-1140.151+fips1 | < 5.15.0-1073.79+fips1

• ubuntu•linux-aws-hwe

  < 4.15.0-1184.197~16.04.1

• ubuntu•linux-azure

  < 4.15.0-1192.207~14.04.1 | < 4.15.0-1192.207~16.04.1 | all | < 5.4.0-1145.152 | < 5.15.0-1078.87 | < 6.8.0-1025.30

• ubuntu•linux-azure-4.15

  < 4.15.0-1192.207

• ubuntu•linux-azure-5.11

  all

• ubuntu•linux-azure-5.13

  all

• ubuntu•linux-azure-5.15

  < 5.15.0-1078.87~20.04.1

• ubuntu•linux-azure-5.19

  all

• ubuntu•linux-azure-5.3

  all

• ubuntu•linux-azure-5.4

  < 5.4.0-1145.152~18.04.1

• ubuntu•linux-azure-5.8

  all

• ubuntu•linux-azure-6.11

  < 6.11.0-1012.12~24.04.1

• ubuntu•linux-azure-6.2

  all

• ubuntu•linux-azure-6.5

  all

• ubuntu•linux-azure-6.8

  < 6.8.0-1025.30~22.04.1

• ubuntu•linux-azure-edge

  all

• ubuntu•linux-azure-fde

  all | all

• ubuntu•linux-azure-fde-5.19

  all

• ubuntu•linux-azure-fde-6.2

  all

• ubuntu•linux-azure-fips

  < 4.15.0-2101.107 | all | < 5.4.0-1145.152+fips1 | < 5.15.0-1078.87+fips1

• ubuntu•linux-azure-nvidia

  < 6.8.0-1014.15

• ubuntu•linux-bluefield

  all | < 5.4.0-1099.106 | < 5.15.0-1057.59

• ubuntu•linux-fips

  < 4.4.0-1117.124 | all | < 4.15.0-1139.150 | < 5.4.0-1116.126 | < 5.15.0-127.137+fips1 | < 6.8.0-78.78+fips1

• ubuntu•linux-gcp

  < 4.15.0-1177.194~16.04.1 | all | < 5.4.0-1143.152 | < 5.15.0-1072.80 | < 6.8.0-1024.26

• ubuntu•linux-gcp-4.15

  < 4.15.0-1177.194

• ubuntu•linux-gcp-5.11

  all

• ubuntu•linux-gcp-5.13

  all

• ubuntu•linux-gcp-5.15

  < 5.15.0-1072.80~20.04.1

• ubuntu•linux-gcp-5.19

  all

• ubuntu•linux-gcp-5.3

  all

• ubuntu•linux-gcp-5.4

  < 5.4.0-1143.152~18.04.1

• ubuntu•linux-gcp-5.8

  all

• ubuntu•linux-gcp-6.11

  < 6.11.0-1011.11~24.04.1

• ubuntu•linux-gcp-6.2

  all

Showing first 50 affected entries in server-rendered view.

References (56)

• https://git.kernel.org/stable/c/872eca64c3267dbc5836b715716fc6c03a18eda7
• https://git.kernel.org/stable/c/7bcbc4cda777d26c88500d973fad0d497fc8a82e
• https://git.kernel.org/stable/c/dcf48ab3ca2c55b09c8f9c8de0df01c1943bc4e5
• https://git.kernel.org/stable/c/fbff87d682e57ddbbe82abf6d0a1a4a36a98afcd
• https://git.kernel.org/stable/c/7ea2bcfd9bf4c3dbbf22546162226fd1c14d8ad2
• https://git.kernel.org/stable/c/af4b8a704f26f38310655bad67fd8096293275a2
• https://git.kernel.org/stable/c/7a7b5a27c53b55e91eecf646d1b204e73fa4af93
• https://git.kernel.org/stable/c/10210658f827ad45061581cbfc05924b723e8922
• https://git.kernel.org/stable/c/9c778fe48d20ef362047e3376dee56d77f8500d4
• https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
• https://cert-portal.siemens.com/productcert/html/ssa-265688.html
• https://cert-portal.siemens.com/productcert/html/ssa-355557.html
• https://ubuntu.com/security/CVE-2024-47685
• https://www.cve.org/CVERecord?id=CVE-2024-47685
• https://git.kernel.org/linus/9c778fe48d20ef362047e3376dee56d77f8500d4
• https://ubuntu.com/security/notices/USN-7166-1
• https://ubuntu.com/security/notices/USN-7166-2
• https://ubuntu.com/security/notices/USN-7166-3
• https://ubuntu.com/security/notices/USN-7186-1
• https://ubuntu.com/security/notices/USN-7186-2
• https://ubuntu.com/security/notices/USN-7194-1
• https://ubuntu.com/security/notices/USN-7166-4
• https://ubuntu.com/security/notices/USN-7276-1
• https://ubuntu.com/security/notices/USN-7277-1
• https://ubuntu.com/security/notices/USN-7293-1
• https://ubuntu.com/security/notices/USN-7294-1
• https://ubuntu.com/security/notices/USN-7295-1
• https://ubuntu.com/security/notices/USN-7301-1
• https://ubuntu.com/security/notices/USN-7303-1
• https://ubuntu.com/security/notices/USN-7304-1
• https://ubuntu.com/security/notices/USN-7294-2
• https://ubuntu.com/security/notices/USN-7294-3
• https://ubuntu.com/security/notices/USN-7303-2
• https://ubuntu.com/security/notices/USN-7310-1
• https://ubuntu.com/security/notices/USN-7311-1
• https://ubuntu.com/security/notices/USN-7303-3
• https://ubuntu.com/security/notices/USN-7294-4
• https://ubuntu.com/security/notices/USN-7384-1
• https://ubuntu.com/security/notices/USN-7385-1
• https://ubuntu.com/security/notices/USN-7386-1
• https://ubuntu.com/security/notices/USN-7393-1
• https://ubuntu.com/security/notices/USN-7384-2
• https://ubuntu.com/security/notices/USN-7401-1
• https://ubuntu.com/security/notices/USN-7403-1
• https://ubuntu.com/security/notices/USN-7413-1
• https://ubuntu.com/security/notices/USN-7468-1
• https://ubuntu.com/security/notices/USN-7539-1
• https://ubuntu.com/security/notices/USN-7540-1
• https://ubuntu.com/security/notices/USN-7727-1
• https://ubuntu.com/security/notices/USN-7727-2
• https://ubuntu.com/security/notices/USN-7727-3
• https://ubuntu.com/security/notices/USN-7755-1
• https://ubuntu.com/security/notices/USN-7755-2
• https://ubuntu.com/security/notices/USN-7755-3
• https://security-tracker.debian.org/tracker/CVE-2024-47685