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CVE-2022-48912

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: netfilter: fix use-after-free in __nf_register_net_hook() We must not dereference @new_hooks after nf_hook_mutex has been relea…

Published Aug 22, 2024CWE-416EPSS 0.23%

Overview

CVE-2022-48912 is a high-severity vulnerability. It was published on August 22, 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:

netfilter: fix use-after-free in __nf_register_net_hook()

We must not dereference @new_hooks after nf_hook_mutex has been released,

because other threads might have freed our allocated hooks already.

BUG: KASAN: use-after-free in nf_hook_entries_get_hook_ops include/linux/netfilter.h:130 [inline]

BUG: KASAN: use-after-free in hooks_validate net/netfilter/core.c:171 [inline]

BUG: KASAN: use-after-free in __nf_register_net_hook+0x77a/0x820 net/netfilter/core.c:438

Read of size 2 at addr ffff88801c1a8000 by task syz-executor237/4430

CPU: 1 PID: 4430 Comm: syz-executor237 Not tainted 5.17.0-rc5-syzkaller-00306-g2293be58d6a1 #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

Call Trace:

<TASK>

__dump_stack lib/dump_stack.c:88 [inline]

dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106

print_address_description.constprop.0.cold+0x8d/0x336 mm/kasan/report.c:255

__kasan_report mm/

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/05f7927b25d2635e87267ff6c79db79fb46cf313Refgit.kernel.org/stable/c/49c24579cec41e32f13d57b337fd28fb208d4a5bRefgit.kernel.org/stable/c/56763f12b0f02706576a088e85ef856deacc98a0Refgit.kernel.org/stable/c/5a8076e98dde17224dd47283b894a8b1dbe1bc72Refgit.kernel.org/stable/c/8b0142c4143c1ca297dcf2c0cdd045d65dae2344Refgit.kernel.org/stable/c/bd61f192a339b1095dfd6d56073a5265934c2979Refgit.kernel.org/stable/c/bdd8fc1b826e6f23963f5bef3f7431c6188ec954

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48912?

CVE-2022-48912 is a high-severity vulnerability. It was published on August 22, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-48912?

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-2022-48912?

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-2022-48912?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48912 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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