CVE-2022-28736 - CVE House
Back to Database
Status published Medium CVE-2022-28736

There's a use-after-free vulnerability in grub_cmd_chainloader() function

Vulnerability Description

There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2022-28736

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Chris Coulson

References

More from GNU Project

View All →
CVE-2025-62689
NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and...
High 8.7
CVE-2025-59777
NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and...
High 8.7
CVE-2022-28735
The GRUB2's shim_lock verifier allows non-kernel files to be loaded...
Medium 6.7
CVE-2022-28734
Out-of-bounds write when handling split HTTP headers
High 8.1
CVE-2022-28733
Integer underflow in grub_net_recv_ip4_packets
High 8.1

Affected Vendor

GNU Project

View all reports →

Affected Software

GNU GRUB
Vulnerable Versions:
0

Timeline

Official Publish: July 20th, 2023
Last Modified: February 13th, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.