Medium · CVSS 6.7CVE-2024-45776

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

Answer in brief

CVE-2024-45776 records a Medium severity (CVSS 6.7) vulnerability in Grub2: grub-core/gettext: integer overflow leads to heap oob write and read.. The current sources do not mark it as known exploited. The current feed maps grub2 (generic), Red Hat/openshift/ose-rhel-coreos-9 (generic), Red Hat/rhcos (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Feb 18, 2025Updated Oct 21, 2026Source checked Nov 3, 2026First seen by HOL Jun 25, 2026Material review Oct 21, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.7
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps grub2 (generic), Red Hat/openshift/ose-rhel-coreos-9 (generic), Red Hat/rhcos (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
grub2generic	>=0 <=2.12	Not reported
Red Hat/openshift/ose-rhel-coreos-9generic	*	Not reported
Red Hat/rhcosgeneric	*	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for grub2, Red Hat/openshift/ose-rhel-coreos-9, Red Hat/rhcos.
Review the reported fix. Source-reported workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Evidence timeline and material changes

Published upstream
Feb 18, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jun 25, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.