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CVE-2024-40961

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent possible NULL deref in fib6_nh_init() syzbot reminds us that in6_dev_get() can return NULL.

Published Jul 12, 2024CWE-476EPSS 0.27%

Overview

CVE-2024-40961 is a medium-severity vulnerability. It was published on July 12, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

ipv6: prevent possible NULL deref in fib6_nh_init()

syzbot reminds us that in6_dev_get() can return NULL.

fib6_nh_init()

ip6_validate_gw( &idev )

ip6_route_check_nh( idev )

*idev = in6_dev_get(dev); // can be NULL

Oops: general protection fault, probably for non-canonical address 0xdffffc00000000bc: 0000 [#1] PREEMPT SMP KASAN PTI

KASAN: null-ptr-deref in range [0x00000000000005e0-0x00000000000005e7]

CPU: 0 PID: 11237 Comm: syz-executor.3 Not tainted 6.10.0-rc2-syzkaller-00249-gbe27b8965297 #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024

RIP: 0010:fib6_nh_init+0x640/0x2160 net/ipv6/route.c:3606

Code: 00 00 fc ff df 4c 8b 64 24 58 48 8b 44 24 28 4c 8b 74 24 30 48 89 c1 48 89 44 24 28 48 8d 98 e0 05 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 b3 17 00 00 8b 1b 31 ff 89 de e8 b8 8b

RSP: 0018:ffffc900032775a0 EFLAGS: 00010202

RAX: 000

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/2eab4543a2204092c3a7af81d7d6c506e59a03a6Refgit.kernel.org/stable/c/3200ffeec4d59aad5bc9ca75d2c1fae47c0aeadeRefgit.kernel.org/stable/c/4cdfe813015d5a24586bd0a84fa0fa6eb0a1f668Refgit.kernel.org/stable/c/88b9a55e2e35ea846d41f4efdc29d23345bd1aa4Refgit.kernel.org/stable/c/ae8d3d39efe366c2198f530e01e4bf07830bf403Refgit.kernel.org/stable/c/b6947723c9eabcab58cfb33cdb0a565a6aee6727Refgit.kernel.org/stable/c/de5ad4d45cd0128a2a37555f48ab69aa19d78adcRefgit.kernel.org/stable/c/2eab4543a2204092c3a7af81d7d6c506e59a03a6Refgit.kernel.org/stable/c/3200ffeec4d59aad5bc9ca75d2c1fae47c0aeadeRefgit.kernel.org/stable/c/4cdfe813015d5a24586bd0a84fa0fa6eb0a1f668

How CyberStrike helps

Frequently asked questions

What is CVE-2024-40961?

CVE-2024-40961 is a medium-severity vulnerability. It was published on July 12, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-40961?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-40961?

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-2024-40961?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-40961 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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