CVE-2024-47685

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2024-10-21. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.1Exploit: NoneExposed: 0

A fix is available — apply it.

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 v3
9.1
EG Score
9.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity91% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
69.0%
KEV
Not listed

Published

October 21, 2024

Last Modified

May 12, 2026

Advisory Details (10)

Auto-updated May 12, 2026
Patch available.
generic Patch Available

[SECURITY] [DLA 4008-1] linux-6.1 security update

https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
generic

netfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fbff87d682e57ddbbe82abf6d0a1a4a36a98afcd
generic

netfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dcf48ab3ca2c55b09c8f9c8de0df01c1943bc4e5
generic

netfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/af4b8a704f26f38310655bad67fd8096293275a2
generic

netfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9c778fe48d20ef362047e3376dee56d77f8500d4
generic

netfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/872eca64c3267dbc5836b715716fc6c03a18eda7
generic

netfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7ea2bcfd9bf4c3dbbf22546162226fd1c14d8ad2
generic

netfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7bcbc4cda777d26c88500d973fad0d497fc8a82e
generic

netfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7a7b5a27c53b55e91eecf646d1b204e73fa4af93
generic

netfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/10210658f827ad45061581cbfc05924b723e8922

Vendor Advisories for CVE-2024-47685(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.127.137~20.04.1) @ focal2026-05-21ubuntu
ubuntulinux-tools-intel-iotg (5.15.0.1071.71) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1078.76) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1078.87~20.04.1) @ focal2026-05-21ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1039.43) @ jammy2026-05-21ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.11.0-18.18) @ oracular2026-05-21ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.11.0-1005.5) @ oracular2026-05-21ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k (6.8.0-1022.25.2) @ noble2026-05-21ubuntu
ubuntulinux-tools-oracle-lts-20.04 (5.4.0.1138.131) @ focal2026-05-21ubuntu
ubuntulinux-tools-ibm-lts-20.04 (5.4.0.1086.115) @ focal2026-05-21ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1020.21) @ noble2026-05-21ubuntu
ubuntulinux-tools-oem-24.04b (6.11.0-1015.15) @ noble2026-05-21ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1023.25~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-raspi (6.8.0-1019.23) @ noble2026-05-21ubuntu
ubuntulinux-tools-kvm (5.4.0.1127.123) @ focal2026-05-21ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1025.30) @ noble2026-05-21ubuntu
ubuntulinux-tools-ibm-lts-24.04 (6.8.0-1022.22) @ noble2026-05-21ubuntu
ubuntulinux-tools-oem-24.04a (6.8.0-1024.24) @ noble2026-05-21ubuntu
ubuntulinux-tools-fips (5.4.0.1116.113) @ focal2026-05-21ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1025.30~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-aws-edge (5.4.0.1142.152~18.04.1) @ bionic2026-05-21ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-57.59~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-iot (5.4.0.1048.46) @ focal2026-05-21ubuntu
ubuntulinux-tools-azure-nvidia (6.8.0-1014.15) @ noble2026-05-21ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1129.160) @ focal2026-05-21ubuntu
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1129.142~18.04.1) @ bionic2026-05-21ubuntu
ubuntulinux-virtual-lts-xenial (4.4.0.272.278) @ xenial2026-05-21ubuntu
ubuntulinux-tools-fips (4.4.0.1117.118) @ xenial2026-05-21ubuntu
ubuntulinux-tools-aws (4.4.0.1185.189) @ xenial2026-05-21ubuntu
redhatkernel-0:5.14.0-570.12.1.el9_62025-05-13redhat
linuxKernel @ 4.19.323—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 119 total refreshes for this CVE.

  1. 2026-07-23 14:17 UTCEPSS rescore
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  3. 2026-07-23 02:41 UTCEG score recompute
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Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2024-47685?
CVE-2024-47685 is a critical vulnerability published on October 21, 2024. In the Linux kernel, the following vulnerability has been resolved: netfilter: nfrejectipv6: fix nfrejectip6tcphdrput() syzbot reported that nfrejectip6tcphdrput() was possibly sending garbage on the four reserved tcp bits (th->res1) Use skbputzero() to clear the whole TCP header, as done in…
When was CVE-2024-47685 disclosed?
CVE-2024-47685 was first published in the National Vulnerability Database on October 21, 2024, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-47685 actively exploited?
CVE-2024-47685 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 69.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-47685?
CVE-2024-47685 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2024-47685?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-47685, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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