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CVE-2022-48649

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: mm/slab_common: fix possible double free of kmem_cache When doing slub_debug test, kfence's 'test_memcache_typesafe_by_rcu' kun…

Published Apr 28, 2024CWE-415EPSS 0.22%

Overview

CVE-2022-48649 is a high-severity vulnerability. It was published on April 28, 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:

mm/slab_common: fix possible double free of kmem_cache

When doing slub_debug test, kfence's 'test_memcache_typesafe_by_rcu'

kunit test case cause a use-after-free error:

BUG: KASAN: use-after-free in kobject_del+0x14/0x30

Read of size 8 at addr ffff888007679090 by task kunit_try_catch/261

CPU: 1 PID: 261 Comm: kunit_try_catch Tainted: G B N 6.0.0-rc5-next-20220916 #17

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014

Call Trace:

<TASK>

dump_stack_lvl+0x34/0x48

print_address_description.constprop.0+0x87/0x2a5

print_report+0x103/0x1ed

kasan_report+0xb7/0x140

kobject_del+0x14/0x30

kmem_cache_destroy+0x130/0x170

test_exit+0x1a/0x30

kunit_try_run_case+0xad/0xc0

kunit_generic_run_threadfn_adapter+0x26/0x50

kthread+0x17b/0x1b0

</TASK>

The cause is inside kmem_cache_destroy():

kmem_cache_destroy

acquire lock/mutex

shutdown_c

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/c673c6ceac53fb2e631c9fbbd79957099a08927fRefgit.kernel.org/stable/c/d71608a877362becdc94191f190902fac1e64d35Refgit.kernel.org/stable/c/c673c6ceac53fb2e631c9fbbd79957099a08927fRefgit.kernel.org/stable/c/d71608a877362becdc94191f190902fac1e64d35

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48649?

CVE-2022-48649 is a high-severity vulnerability. It was published on April 28, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-48649?

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-2022-48649?

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-2022-48649?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48649 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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