CVE-2024-45783: grub2 Improper Update of Reference Count
CVSS: 4.4v3.1MediumDeferred
AliasesUBUNTU-CVE-2024-45783DEBIAN-CVE-2024-45783
Published 18-02-2025Last modified 29-06-2026
Vulnerability summary
CVE-2024-45783 is a medium (CVSS 4.4) Improper Update of Reference Count vulnerability in grub2. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 13.7% of scored vulnerabilities.
CVSS score
4.4/10
010
Medium · v3.1 (CVE.org)EPSS score
0.24%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 10 · Related 9Timeline
- 18-02-2025PublishedVulnerability first disclosed.
- 29-06-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 4.4Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated4.4MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated4.4MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- NVDNIST4.4MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
14%
Versus all other CVEs
30-day change
+0.01 pp
From 0.23% on 18-09-2026
18-09-202618-10-2026
EPSS score0.24%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu3 products
- grub2All versions (No fix recorded)
- grub2-signedAll versions (No fix recorded)
- grub2-unsignedAll versions (No fix recorded)
Debian1 product
- grub2< 2.06-13+deb12u2 | < 2.12-6
2 vendors · 4 products
