CVE-2023-52448 gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump

What is CVE-2023-52448?

CVE-2023-52448 is a medium-severity vulnerability in Linux kernel, published on 22 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump

Syzkaller has reported a NULL pointer dereference when accessing rgd->rd_rgl in gfs2_rgrp_dump(). This can happen when creating rgd->rd_gl fails in read_rindex_entry(). Add a NULL pointer check in gfs2_rgrp_dump() to prevent that.

Weakness: CWE-476

Which versions are affected by CVE-2023-52448?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-52448?

Apply the vendor's patch.

Is CVE-2023-52448 being exploited?

There is no known exploitation of CVE-2023-52448 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2023-52448, DEBIAN-CVE-2023-52448, GHSA-2rwp-xr6x-9ppc, UBUNTU-CVE-2023-52448.