CVE-2024-47736

5.5 · MEDIUM

Published Oct 21, 2024 linux CWE-667 EPSS 0.18% (8th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-47736 is a medium-severity vulnerability affecting linux linux_kernel. It was published on October 21, 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:

erofs: handle overlapped pclusters out of crafted images properly

syzbot reported a task hang issue due to a deadlock case where it is

waiting for the folio lock of a cached folio that will be used for

cache I/Os.

After looking into the crafted fuzzed image, I found it's formed with

several overlapped big pclusters as below:

Ext: logical offset | length : physical offset | length

0: 0.. 16384 | 16384 : 151552.. 167936 | 16384

1: 16384.. 32768 | 16384 : 155648.. 172032 | 16384

2: 32768.. 49152 | 16384 : 537223168.. 537239552 | 16384

...

Here, extent 0/1 are physically overlapped although it's entirely

_impossible_ for normal filesystem images generated by mkfs.

First, managed folios containing compressed data will be marked as

up-to-date and then unlocked immediately (unlike in-place folios) when

compressed I/Os are complete. If physical blocks

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	>= 5.13, < 6.10.13	Affected

References

Ref git.kernel.org/stable/c/1bf7e414cac303c9aec1be67872e19be8b64980c Ref git.kernel.org/stable/c/9cfa199bcbbbba31cbf97b2786f44f4464f3f29a Ref git.kernel.org/stable/c/9e2f9d34dd12e6e5b244ec488bcebd0c2d566c50 Ref git.kernel.org/stable/c/b9b30af0e86ffb485301ecd83b9129c9dfb7ebf8 Ref git.kernel.org/stable/c/c1172e65aad4b115392ea4c6e61e56e5b9b69df4 Ref cert-portal.siemens.com/productcert/html/ssa-019113.html Ref cert-portal.siemens.com/productcert/html/ssa-082556.html

Frequently Asked Questions

What is CVE-2024-47736?

CVE-2024-47736 is a medium-severity vulnerability affecting linux linux_kernel. It was published on October 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-47736?

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-2024-47736?

How can CyberStrike help with CVE-2024-47736?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-47736 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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HackBrowser

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