Red Hat Enterprise Linux/OpenShift Container Platform grub2 grub_mofile_open out-of-bounds write

Summaryinfo

A vulnerability was found in Red Hat Enterprise Linux and OpenShift Container Platform. It has been rated as critical. Affected is the function grub_mofile_open of the component grub2. Performing a manipulation results in out-of-bounds write. This vulnerability was named CVE-2024-45776. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in Red Hat Enterprise Linux and OpenShift Container Platform (version unknown). This affects the function grub_mofile_open of the component grub2. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

When reading the language .mo file in grub_mofile_open(), grub2 fails to verify an integer overflow when allocating its internal buffer. A crafted .mo file may lead the buffer size calculation to overflow, leading to out-of-bound reads and writes. This flaw allows an attacker to leak sensitive data or overwrite critical data, possibly circumventing secure boot protections.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2024-45776 since 09/08/2024. The exploitability is told to be easy. Attacking locally is a requirement. Additional levels of successful authentication are necessary for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/11/2025).

The vulnerability scanner Nessus provides a plugin with the ID 216508 (SUSE SLES15 Security Update : grub2 (SUSE-SU-2025:0588-1)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (216508), EUVD (EUVD-2025-4782) and CERT Bund (WID-SEC-2025-0396). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• NetApp ActiveIQ Unified Manager
• Dell NetWorker
• Dell Avamar
• Open Source Grub
• Red Hat OpenShift
• IBM QRadar SIEM

Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux
• OpenShift Container Platform

License

• commercial

Website

• Vendor: https://www.redhat.com/

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