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CVE-2024-36902

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ipv6: fib6_rules: avoid possible NULL dereference in fib6_rule_action() syzbot is able to trigger the following crash [1], caus…

Published May 30, 2024CWE-476EPSS 0.29%

Overview

CVE-2024-36902 is a medium-severity vulnerability. It was published on May 30, 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: fib6_rules: avoid possible NULL dereference in fib6_rule_action()

syzbot is able to trigger the following crash [1],

caused by unsafe ip6_dst_idev() use.

Indeed ip6_dst_idev() can return NULL, and must always be checked.

[1]

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI

KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]

CPU: 0 PID: 31648 Comm: syz-executor.0 Not tainted 6.9.0-rc4-next-20240417-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024

RIP: 0010:__fib6_rule_action net/ipv6/fib6_rules.c:237 [inline]

RIP: 0010:fib6_rule_action+0x241/0x7b0 net/ipv6/fib6_rules.c:267

Code: 02 00 00 49 8d 9f d8 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 f9 32 bf f7 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 e0 32 bf f7 4c 8b 03 48 89 ef

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/1876881c9a49613b5249fb400cbf53412d90cb09Refgit.kernel.org/stable/c/35297fc68de36826087e976f86a5b1f94fd0bf95Refgit.kernel.org/stable/c/4a5a573387da6a6b23a4cc62147453ff1bc32afaRefgit.kernel.org/stable/c/674c951ab8a23f7aff9b4c3f2f865901bc76a290Refgit.kernel.org/stable/c/7e3242c139c38e60844638e394c2877b16b396b0Refgit.kernel.org/stable/c/8745a8d74ba17dafe72b6ab461fa6c007d879747Refgit.kernel.org/stable/c/d101291b2681e5ab938554e3e323f7a7ee33e3aaRefgit.kernel.org/stable/c/ddec23f206a944c73bcc2724358b85388837daffRefgit.kernel.org/stable/c/1876881c9a49613b5249fb400cbf53412d90cb09Refgit.kernel.org/stable/c/35297fc68de36826087e976f86a5b1f94fd0bf95

How CyberStrike helps

Frequently asked questions

What is CVE-2024-36902?

CVE-2024-36902 is a medium-severity vulnerability. It was published on May 30, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-36902?

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-2024-36902?

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-2024-36902?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-36902 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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