Grub2: fs/ufs: oob write in the heap
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| unaffected |
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| Red Hat | Red Hat Enterprise Linux 10 | affected |
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| Red Hat | Red Hat Enterprise Linux 9 | affected |
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| Red Hat | Red Hat Enterprise Linux 7 | unknown | — | ||||||
| Red Hat | Red Hat Enterprise Linux 8 | unknown | — | ||||||
| Red Hat | Red Hat OpenShift Container Platform 4 | affected | — |
No data.
| Package | CPE | Advisory | Released Date |
|---|---|---|---|
| Red Hat Enterprise Linux 9 | |||
| grub2-1:2.06-104.el9_6 | cpe:/o:redhat:enterprise_linux:9 | RHSA-2025:6990 | 2025-05-13T00:00:00Z |
No data available yet.
Vendor 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.
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-4685-1 | grub2 security update |
EUVD |
EUVD-2025-4786 | 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 CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.305% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat rhel Els
|
|
| CPEs | cpe:/o:redhat:enterprise_linux:8 |
cpe:/a:redhat:enterprise_linux:8 cpe:/o:redhat:rhel_els:7 |
| Vendors & Products |
Redhat rhel Els
|
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | ||
| Vendors & Products |
Redhat rhivos
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat rhivos
|
|
| CPEs | cpe:/o:redhat:rhivos:1 | |
| Vendors & Products |
Redhat rhivos
|
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:/o:redhat:enterprise_linux:10.0 | |
| References |
|
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:/o:redhat:enterprise_linux:10 |
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:/o:redhat:enterprise_linux:9 |
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:/o:redhat:enterprise_linux:9::baseos | |
| References |
|
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-787 |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| References |
| |
| Metrics |
threat_severity
|
threat_severity
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| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Grub2: fs/ufs: oob write in the heap | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat openshift |
|
| CPEs | cpe:/a:redhat:openshift:4 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
|
| Vendors & Products |
Redhat
Redhat enterprise Linux Redhat openshift |
|
| References |
| |
| Metrics |
cvssV3_1
|