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CVE-2022-49014

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: tun: Fix use-after-free in tun_detach() syzbot reported use-after-free in tun_detach() [1].

Published Oct 21, 2024CWE-416EPSS 0.26%

Overview

CVE-2022-49014 is a high-severity vulnerability. It was published on October 21, 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: tun: Fix use-after-free in tun_detach()

syzbot reported use-after-free in tun_detach() [1]. This causes call

trace like below:

==================================================================

BUG: KASAN: use-after-free in notifier_call_chain+0x1ee/0x200 kernel/notifier.c:75

Read of size 8 at addr ffff88807324e2a8 by task syz-executor.0/3673

CPU: 0 PID: 3673 Comm: syz-executor.0 Not tainted 6.1.0-rc5-syzkaller-00044-gcc675d22e422 #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022

Call Trace:

<TASK>

__dump_stack lib/dump_stack.c:88 [inline]

dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106

print_address_description mm/kasan/report.c:284 [inline]

print_report+0x15e/0x461 mm/kasan/report.c:395

kasan_report+0xbf/0x1f0 mm/kasan/report.c:495

notifier_call_chain+0x1ee/0x200 kernel/notifier.c:75

call_netdevice_notifiers_info+0x86/0x130 net/core/dev.c:1942

call_netdevic

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/04b995e963229501401810dab89dc73e7f12d054Refgit.kernel.org/stable/c/16c244bc65d1175775325ec0489a5a5c830e02c7Refgit.kernel.org/stable/c/1f23f1890d91812c35d32eab1b49621b6d32dc7bRefgit.kernel.org/stable/c/4cde8da2d814a3b7b176db81922d4ddaad7c0f0eRefgit.kernel.org/stable/c/5daadc86f27ea4d691e2131c04310d0418c6cd12Refgit.kernel.org/stable/c/5f442e1d403e0496bacb74a58e2be7f500695e6f

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49014?

CVE-2022-49014 is a high-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-49014?

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-2022-49014?

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-2022-49014?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49014 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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