CVE-2024-45781
published 2025-02-18CVE-2024-45781: A flaw was found in grub2. When reading a symbolic link's name from a UFS filesystem, grub2 fails to validate the string length taken as an input. The lack of…
PriorityP431medium6.7CVSS 3.1
AVLACLPRHUINSUCHIHAH
EPSS
0.24%
15.5th percentile
A flaw was found in grub2. When reading a symbolic link's name from a UFS filesystem, grub2 fails to validate the string length taken as an input. The lack of validation may lead to a heap out-of-bounds write, causing data integrity issues and eventually allowing an attacker to circumvent secure boot protections.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | grub2 | < grub2 2.12-6 (forky) | grub2 2.12-6 (forky) |
| gnu | grub2 | >= 0 < 2.12-6 | 2.12-6 |
| gnu | grub2 | >= 0 < 2.12-6 | 2.12-6 |
| msrc | azl3_grub2_2.06-24_on_azure_linux_3.0 | — | — |
| msrc | azl3_grub2_2.06-25_on_azure_linux_3.0 | — | — |
| msrc | cbl2_grub2_2.06-14_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_grub2_2.06-15_on_cbl_mariner_2.0 | — | — |
CVSS provenance
nvdv3.16.7MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
osv6.7MEDIUM
vendor_debian6.7MEDIUM
vendor_msrc6.7MEDIUM
vendor_redhat6.7MEDIUM
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Red Hat
grub2: fs/ufs: OOB write in the heap
vendor_redhat·2025-02-18·CVSS 6.7
CVE-2024-45781 [MEDIUM] CWE-787 grub2: fs/ufs: OOB write in the heap
grub2: fs/ufs: OOB write in the heap
A flaw was found in grub2. When reading a symbolic link's name from a UFS filesystem, grub2 fails to validate the string length taken as an input. The lack of validation may lead to a heap out-of-bounds write, causing data integrity issues and eventually allowing an attacker to circumvent secure boot protections.
A flaw was found in grub2. When reading a symbolic link's name from a UFS filesystem, grub2 fails to validate the string length taken as an input. The lack of validation may lead to a heap out-of-bounds write, causing data integrity issues and eventually allowing an attacker to circumvent secure boot protections.
Mitigation: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product S
Microsoft
Grub2: fs/ufs: oob write in the heap
vendor_msrc·2025-02-11·CVSS 6.7
CVE-2024-45781 [MEDIUM] CWE-787 Grub2: fs/ufs: oob write in the heap
Grub2: fs/ufs: oob write in the heap
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
redhat: redhat
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.microsoft.com/en
Debian
CVE-2024-45781: grub2 - A flaw was found in grub2. When reading a symbolic link's name from a UFS filesy...
vendor_debian·2024·CVSS 6.7
CVE-2024-45781 [MEDIUM] CVE-2024-45781: grub2 - A flaw was found in grub2. When reading a symbolic link's name from a UFS filesy...
A flaw was found in grub2. When reading a symbolic link's name from a UFS filesystem, grub2 fails to validate the string length taken as an input. The lack of validation may lead to a heap out-of-bounds write, causing data integrity issues and eventually allowing an attacker to circumvent secure boot protections.
Scope: local
bookworm: open
bullseye: open
forky: resolved (fixed in 2.12-6)
sid: resolved (fixed in 2.12-6)
trixie: resolved (fixed in 2.12-6)
OSV
CVE-2024-45781: A flaw was found in grub2
osv·2025-02-18·CVSS 6.7
CVE-2024-45781 [MEDIUM] CVE-2024-45781: A flaw was found in grub2
A flaw was found in grub2. When reading a symbolic link's name from a UFS filesystem, grub2 fails to validate the string length taken as an input. The lack of validation may lead to a heap out-of-bounds write, causing data integrity issues and eventually allowing an attacker to circumvent secure boot protections.
GHSA
GHSA-2xfx-cg6v-cwqv: A flaw was found in grub2
ghsa_unreviewed·2025-02-18
CVE-2024-45781 [MEDIUM] CWE-787 GHSA-2xfx-cg6v-cwqv: A flaw was found in grub2
A flaw was found in grub2. When reading a symbolic link's name from a UFS filesystem, grub2 fails to validate the string length taken as an input. The lack of validation may lead to a heap out-of-bounds write, causing data integrity issues and eventually allowing an attacker to circumvent secure boot protections.
No detection rules found.
No public exploits indexed.
2025-02-18
Published