Grub2: fs/tar: integer overflow causes heap oob write
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 | unaffected | — | ||||||
| Red Hat | Red Hat Enterprise Linux 7 | unaffected | — | ||||||
| Red Hat | Red Hat Enterprise Linux 8 | unaffected | — | ||||||
| Red Hat | Red Hat Enterprise Linux 9 | unaffected | — | ||||||
| Red Hat | Red Hat OpenShift Container Platform 4 | unaffected | — |
No data.
No data available yet.
Vendor Workaround
Do not run grub2 in an untrusted environment, specifically with a tar file system image.
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-4685-1 | grub2 security update |
EUVD |
EUVD-2025-5590 | 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. |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.293% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat rhel Els
|
|
| CPEs | cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
cpe:/a:redhat:enterprise_linux:10 cpe:/a:redhat:enterprise_linux:8 cpe:/a:redhat:enterprise_linux:9 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 | ||
| 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 |
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| Title | grub2: fs/tar: Integer Overflow causes Heap OOB Write | Grub2: fs/tar: integer overflow causes heap oob write |
| 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 |
|
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | grub2: fs/tar: Integer Overflow causes Heap OOB Write | |
| Weaknesses | CWE-190 CWE-787 |
|
| References |
| |
| Metrics |
threat_severity
|
cvssV3_1
|