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CVE-2024-26852

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net/ipv6: avoid possible UAF in ip6_route_mpath_notify() syzbot found another use-after-free in ip6_route_mpath_notify() [1] C…

Published Apr 17, 2024CWE-416EPSS 0.27%

Overview

CVE-2024-26852 is a high-severity vulnerability. It was published on April 17, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

net/ipv6: avoid possible UAF in ip6_route_mpath_notify()

syzbot found another use-after-free in ip6_route_mpath_notify() [1]

Commit f7225172f25a ("net/ipv6: prevent use after free in

ip6_route_mpath_notify") was not able to fix the root cause.

We need to defer the fib6_info_release() calls after

ip6_route_mpath_notify(), in the cleanup phase.

[1]

BUG: KASAN: slab-use-after-free in rt6_fill_node+0x1460/0x1ac0

Read of size 4 at addr ffff88809a07fc64 by task syz-executor.2/23037

CPU: 0 PID: 23037 Comm: syz-executor.2 Not tainted 6.8.0-rc4-syzkaller-01035-gea7f3cfaa588 #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024

Call Trace:

<TASK>

__dump_stack lib/dump_stack.c:88 [inline]

dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106

print_address_description mm/kasan/report.c:377 [inline]

print_report+0x167/0x540 mm/kasan/report.c:488

kasan_report+0x142/0x180 mm/kasan/rep

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/31ea5bcc7d4cd1423de6be327a2c034725704136Refgit.kernel.org/stable/c/394334fe2ae3b9f1e2332b873857e84cb28aac18Refgit.kernel.org/stable/c/61b34f73cdbdb8eaf9ea12e9e2eb3b29716c4ddaRefgit.kernel.org/stable/c/664f9c647260cc9d68b4e31d9899530d89dd045eRefgit.kernel.org/stable/c/685f7d531264599b3f167f1e94bbd22f120e5fabRefgit.kernel.org/stable/c/79ce2e54cc0ae366f45516c00bf1b19aa43e9abeRefgit.kernel.org/stable/c/cae3303257950d03ffec2df4a45e836f10d26c24Refgit.kernel.org/stable/c/ed883060c38721ed828061f6c0c30e5147326c9aRefgit.kernel.org/stable/c/31ea5bcc7d4cd1423de6be327a2c034725704136Refgit.kernel.org/stable/c/394334fe2ae3b9f1e2332b873857e84cb28aac18

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26852?

CVE-2024-26852 is a high-severity vulnerability. It was published on April 17, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-26852?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-26852?

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-2024-26852?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26852 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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