high CVSS 7.8

CVE-2023-52867·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: drm/radeon: possible buffer overflow Buffer 'afmt_status' of size 6 could overflow, since index 'afmt_idx' is checked after access.

Severity
high
Software
Kernel
Fixed in
6.6.2
Published
2024-05-21

Affected versions

From: 6.6

Until: 6.6.2

Fixed in: 6.6.2

How to fix this CVE

Update your Linux kernel to version 6.6.2 or later to remediate CVE-2023-52867. This vulnerability involves an array bounds checking issue in the Radeon DRM driver where the 'afmt_status' buffer could be accessed beyond its allocated size. Affected systems running kernel versions 6.6 through 6.6.1 should prioritize this update to prevent potential memory corruption.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Step 1: Check your kernel version with `uname -r` and verify it falls within the 6.6.0-6.6.1 range
  2. Step 2: Confirm Radeon GPU presence with `lspci | grep -i radeon` to determine if the vulnerable driver component is loaded
  3. Step 3: Monitor kernel logs with `sudo dmesg | grep -i 'radeon\|afmt\|buffer\|overflow'` for any memory access violations or warnings
  4. Step 4: After patching, verify the new kernel version with `uname -r` and reboot if necessary, then confirm Radeon driver loaded without errors using `dmesg | tail -20`

FAQ

What is CVE-2023-52867?

CVE-2023-52867 is a memory safety vulnerability in the Linux kernel's Radeon DRM graphics driver where improper array bounds validation allows an out-of-bounds buffer access, potentially leading to kernel memory corruption.

Is CVE-2023-52867 being actively exploited?

No, CVE-2023-52867 is not listed in CISA's Known Exploited Vulnerabilities (KEV) catalog and no public exploits are currently available.

What versions of Kernel are affected by CVE-2023-52867?

Linux kernel versions 6.6.0 through 6.6.1 are affected. Kernel 6.6.2 and later include the fix.

How do I check if my server is vulnerable to CVE-2023-52867?

Run `uname -r` to check your kernel version; if it shows 6.6.0 or 6.6.1 and you have a Radeon GPU (verify with `lspci | grep -i radeon`), your system is vulnerable.

Does Defensia detect CVE-2023-52867?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Kernel is installed on a monitored server, CVE-2023-52867 will appear in your dashboard with remediation steps.

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References

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