Description
A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the net_set_vlan command is not properly unregistered when the network module is unloaded from memory. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GNU | grub2 | ≤ 2.14 | — |
| 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 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | grub2 | 2.14-1 | — |
| Debian 13 | grub2 | No fix yet | — |
| Debian 12 | grub2 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | grub2-signed +1 | No fix yet | — |
| Ubuntu 26.04 LTS | grub2-signed +1 | No fix yet | — |
| Ubuntu 25.10 | grub2-signed +1 | No fix yet | — |
| Ubuntu 24.04 LTS | grub2-signed +1 | No fix yet | — |
| Ubuntu 22.04 LTS | grub2-signed +1 | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | grub2-signed +1 | No fix yet | — |
| Ubuntu 18.04 LTS | grub2-signed +1 | No fix yet | — |
| Ubuntu 16.04 LTS | grub2-signed +1 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | grub2 +1 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | grub2 | 2.12-150700.19.19.1 | SUSE-SU-2025:4305-1 |
| SLES 15 SP6 | grub2 | 2.12-150600.8.44.2 | SUSE-SU-2025:4196-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | grub2 | 2.12-160000.3.1 | SUSE-SU-2025:21212-1 |
| SLES 16.0 | grub2 | 2.12-160000.3.1 | SUSE-SU-2025:21212-1 |
| SLE Micro 6.2 | grub2 | 2.12-160000.3.1 | SUSE-SU-2025:21223-1 |
| SLE Micro 6.1 | grub2 | 2.12-slfo.1.1_3.1 | SUSE-SU-2025:21062-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | grub2 | 2.12-67.1 | openSUSE-SU-2025:15749-1 |
| openSUSE Leap 16.0 | grub2 | 2.12-160000.3.1 | openSUSE-SU-2025:20163-1 |
| openSUSE Leap 15.6 | grub2 | 2.12-150600.8.44.2 | SUSE-SU-2025:4196-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | grub2-pc +16 | 1:2.06-61.amzn2023.0.21 | ALAS2023-2025-1342 |
| Amazon Linux 2 | grub2 +17 | 1:2.06-14.amzn2.0.7 | ALAS2-2025-3107 |
Advisories 11
- WID-SEC-2025-2638 Grub: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 15, 2026
- WID-SEC-2026-0778 Dell Secure Connect Gateway Policy Manager: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 11, 2026
- openSUSE-SU-2025:20163-1 Security update for grub2 SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15749-1 grub2-2.12-67.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21212-1 Security update for grub2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4196-1 Security update for grub2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21223-1 Security update for grub2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21062-1 Security update for grub2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4305-1 Security update for grub2 SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2025-1342 Moderate: grub2 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jan 7, 2026
- ALAS2-2025-3107 Moderate: grub2 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jan 5, 2026