CVE-2024-45776: Grub2: grub-core/gettext: integer overflow leads to heap oob write and read.

Severity: medium (CVSS 6.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-18 · updated 2026-10-21
Weakness: CWE-787

Description

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.

Affected products

Red Hat OpenShift Container Platform 4.18: all versions
Red Hat Enterprise Linux 10: all versions — fixed in 1:2.12-15.el10_0
Red Hat Enterprise Linux 9: all versions — fixed in 1:2.06-104.el9_6

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 1:2.12-15.el10_0; Red Hat Enterprise Linux 9 1:2.06-104.el9_6. Check the vendor advisory for mitigations.

References

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