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CVE-2024-53235

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: erofs: fix file-backed mounts over FUSE syzbot reported a null-ptr-deref in fuse_read_args_fill: fuse_read_folio+0xb0/0x100 fs…

Published Dec 27, 2024CWE-476EPSS 0.18%

Overview

CVE-2024-53235 is a medium-severity vulnerability. It was published on December 27, 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: fix file-backed mounts over FUSE

syzbot reported a null-ptr-deref in fuse_read_args_fill:

fuse_read_folio+0xb0/0x100 fs/fuse/file.c:905

filemap_read_folio+0xc6/0x2a0 mm/filemap.c:2367

do_read_cache_folio+0x263/0x5c0 mm/filemap.c:3825

read_mapping_folio include/linux/pagemap.h:1011 [inline]

erofs_bread+0x34d/0x7e0 fs/erofs/data.c:41

erofs_read_superblock fs/erofs/super.c:281 [inline]

erofs_fc_fill_super+0x2b9/0x2500 fs/erofs/super.c:625

Unlike most filesystems, some network filesystems and FUSE need

unavoidable valid `file` pointers for their read I/Os [1].

Anyway, those use cases need to be supported too.

[1] https://docs.kernel.org/filesystems/vfs.html

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/3a23787ca8756920d65fda39f41353a4be1d1642Refgit.kernel.org/stable/c/5036f2f024cac40a02ea6ea70de2c3a4407d16bc

How CyberStrike helps

Frequently asked questions

What is CVE-2024-53235?

CVE-2024-53235 is a medium-severity vulnerability. It was published on December 27, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-53235?

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-2024-53235?

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-2024-53235?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-53235 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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