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Fencer Vulns
medium 6.7

CVE-2024-45780 json

Grub2: fs/tar: integer overflow causes heap oob write

published 2025-03-03 20 mo ago modified 2026-11-05 4 d ago also EUVD-2025-5590

cvss
6.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

A flaw was found in grub2. When reading tar files, grub2 allocates an internal buffer for the file name. However, it fails to properly verify the allocation against possible integer overflows. It's possible to cause the allocation length to overflow with a crafted tar file, leading to a heap out-of-bounds write. This flaw eventually allows an attacker to circumvent secure boot protections.

Patch / fix

  • grub2 Debian 12 2.06-13+deb12u2
  • grub2 Debian 14, Debian 13 2.12-6

debian advisories DEBIAN-CVE-2024-45780

  • grub2 Linux Micro 6.1 2.12-slfo.1.1_2.1
  • grub2 Linux Micro 6.0 2.12~rc1-6.1
  • grub2 SLE Micro 5.1 2.04-150300.3.11.1
  • grub2 SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Micro 5.2 +2 more 2.04-150300.22.52.3
  • grub2 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +7 more 2.06-150400.11.55.2
  • grub2 SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 2.06-150500.29.43.2
  • grub2 SLE Module for Server Applications 15 SP6, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.12-150600.8.18.2
  • grub2 SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 2.02-181.2

suse advisories SUSE-SU-2025:20863-1SUSE-SU-2025:20511-1SUSE-SU-2025:01961-1SUSE-SU-2025:0629-1SUSE-SU-2025:0607-1SUSE-SU-2025:0588-1

  • grub2 openSUSE Tumbleweed 2.12-35.1

opensuse advisories openSUSE-SU-2025:14822-1

  • grub2 Azure Linux 3.0 2.06-25
  • grub2 CBL-Mariner 2.0 2.06-15

azure linux advisories AZL-57492AZL-57614

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-45780 updated cvss 6.7

grub2: fs/tar: Integer Overflow causes Heap OOB Write

  • Red Hat Enterprise Linux 7 grub2, grub2-pc, grub2-efi, grub2-ppc64, grub2-tools, grub2-common, +15 more Red Hat Enterprise Linux 8 grub2, grub2-pc, grub2-tools, grub2-common, grub2-efi-x64, grub2-ppc64le, +13 more Red Hat Enterprise Linux 9 grub2, grub2-pc, grub2-tools, grub2-common, grub2-efi-x64, grub2-ppc64le, +10 more Red Hat Enterprise Linux 10 grub2 Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.