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CVE-2024-47685

9.1 · CRITICAL

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…

Published Oct 21, 2024CWE-908EPSS 1.37%

Overview

CVE-2024-47685 is a critical-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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/netfilt

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/10210658f827ad45061581cbfc05924b723e8922Refgit.kernel.org/stable/c/7a7b5a27c53b55e91eecf646d1b204e73fa4af93Refgit.kernel.org/stable/c/7bcbc4cda777d26c88500d973fad0d497fc8a82eRefgit.kernel.org/stable/c/7ea2bcfd9bf4c3dbbf22546162226fd1c14d8ad2Refgit.kernel.org/stable/c/872eca64c3267dbc5836b715716fc6c03a18eda7Refgit.kernel.org/stable/c/9c778fe48d20ef362047e3376dee56d77f8500d4Refgit.kernel.org/stable/c/af4b8a704f26f38310655bad67fd8096293275a2Refgit.kernel.org/stable/c/dcf48ab3ca2c55b09c8f9c8de0df01c1943bc4e5Refgit.kernel.org/stable/c/fbff87d682e57ddbbe82abf6d0a1a4a36a98afcdReflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-47685?

CVE-2024-47685 is a critical-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2024-47685?

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-47685?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-47685?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-47685 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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