CVE-2024-36936

5.5 · MEDIUM

Published May 30, 2024 linux CWE-667 EPSS 0.17% (7th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-36936 is a medium-severity vulnerability affecting linux linux_kernel. 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:

efi/unaccepted: touch soft lockup during memory accept

Commit 50e782a86c98 ("efi/unaccepted: Fix soft lockups caused by

parallel memory acceptance") has released the spinlock so other CPUs can

do memory acceptance in parallel and not triggers softlockup on other

CPUs.

However the softlock up was intermittent shown up if the memory of the

TD guest is large, and the timeout of softlockup is set to 1 second:

RIP: 0010:_raw_spin_unlock_irqrestore

Call Trace:

? __hrtimer_run_queues

<IRQ>

? hrtimer_interrupt

? watchdog_timer_fn

? __sysvec_apic_timer_interrupt

? __pfx_watchdog_timer_fn

? sysvec_apic_timer_interrupt

</IRQ>

? __hrtimer_run_queues

<TASK>

? hrtimer_interrupt

? asm_sysvec_apic_timer_interrupt

? _raw_spin_unlock_irqrestore

? __sysvec_apic_timer_interrupt

? sysvec_apic_timer_interrupt

accept_memory

try_to_accept_memory

do_huge_pmd_anonymous_page

get_page_from_freelist

__handle_mm_fault

__a

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected Products

Vendor	Product	Versions	Status
linux	linux_kernel	>= 6.5.9, < 6.6	Affected

References

Ref git.kernel.org/stable/c/1c5a1627f48105cbab81d25ec2f72232bfaa8185 Ref git.kernel.org/stable/c/781e34b736014188ba9e46a71535237313dcda81 Ref git.kernel.org/stable/c/e115c1b5de55a105c75aba8eb08301c075fa4ef4 Ref git.kernel.org/stable/c/1c5a1627f48105cbab81d25ec2f72232bfaa8185 Ref git.kernel.org/stable/c/781e34b736014188ba9e46a71535237313dcda81

Frequently Asked Questions

What is CVE-2024-36936?

CVE-2024-36936 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 30, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-36936?

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-2024-36936?

How can CyberStrike help with CVE-2024-36936?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-36936 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

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