Grub2: fs/hfs+: refcount can be decremented twice (CVE-2024-45783) | HOL Guard CVE

Medium · CVSS 4.4CVE-2024-45783

Grub2: fs/hfs+: refcount can be decremented twice

Answer in brief

CVE-2024-45783 records a Medium severity (CVSS 4.4) vulnerability in Grub2: fs/hfs+: refcount can be decremented twice. The current sources do not mark it as known exploited. Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Analysis pending evidence review

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

Published Feb 18, 2025Updated Jun 29, 2026Source checked Aug 6, 2026First seen by HOL Jun 25, 2026Material review Jun 29, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 4.4
Exploitation: Not marked as known exploited
Affected software: Not mapped
Fix availability: Not reported

Why this deserves its current priority

CVSS is 4.4. 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

Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Recommended response

Confirm exposure. Identify whether the named product or interface exists in your inventory, then review the linked upstream references for affected versions and vendor guidance.

Evidence timeline and material changes

Published upstream
Feb 18, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jun 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jun 25, 2026

Sources and claim methodology

Upstream source description

A flaw was found in grub2. When failing to mount an HFS+ grub, the hfsplus filesystem driver doesn't properly set an ERRNO value. This issue may lead to a NULL pointer access.

Quoted source text, attributed separately from HOL analysis.

Back to active CVEs

Medium · CVSS 4.4CVE-2024-45783

Grub2: fs/hfs+: refcount can be decremented twice

Answer in brief

Analysis pending evidence review

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

Published Feb 18, 2025Updated Jun 29, 2026Source checked Aug 6, 2026First seen by HOL Jun 25, 2026Material review Jun 29, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 4.4
Exploitation: Not marked as known exploited
Affected software: Not mapped
Fix availability: Not reported

Why this deserves its current priority

CVSS is 4.4. 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

Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Recommended response

Confirm exposure. Identify whether the named product or interface exists in your inventory, then review the linked upstream references for affected versions and vendor guidance.

Evidence timeline and material changes

Published upstream
Feb 18, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jun 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jun 25, 2026

Sources and claim methodology

Upstream source description

A flaw was found in grub2. When failing to mount an HFS+ grub, the hfsplus filesystem driver doesn't properly set an ERRNO value. This issue may lead to a NULL pointer access.

Quoted source text, attributed separately from HOL analysis.