CVE-2025-54770
published 2025-11-18CVE-2025-54770: 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…
PriorityP425medium4.9CVSS 3.1
AVLACHPRNUINSUCLILAL
EPSS
0.14%
4.1th percentile
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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | grub2 | < grub2 2.14-1 (sid) | grub2 2.14-1 (sid) |
| gnu | grub2 | <= 2.14 | — |
| msrc | azl3_grub2_2.06-25_on_azure_linux_3.0 | — | — |
| msrc | cbl2_grub2_2.06-15_on_cbl_mariner_2.0 | — | — |
CVSS provenance
nvdv3.14.9MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
osv4.9MEDIUM
vendor_debian4.9MEDIUM
vendor_msrc4.9MEDIUM
vendor_redhat4.9MEDIUM
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Red Hat
grub2: Use-after-free in net_set_vlan
vendor_redhat·2025-11-18·CVSS 4.9
CVE-2025-54770 [MEDIUM] CWE-825 grub2: Use-after-free in net_set_vlan
grub2: Use-after-free in net_set_vlan
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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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
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 unregis
Microsoft
Grub2: use-after-free in net_set_vlan
vendor_msrc·2025-11-11·CVSS 4.9
CVE-2025-54770 [MEDIUM] CWE-825 Grub2: use-after-free in net_set_vlan
Grub2: use-after-free in net_set_vlan
Mariner: Mariner
redhat: redhat
Customer Action Required: Yes
Debian
CVE-2025-54770: grub2 - A vulnerability has been identified in the GRUB2 bootloader's network module tha...
vendor_debian·2025·CVSS 4.9
CVE-2025-54770 [MEDIUM] CVE-2025-54770: grub2 - A vulnerability has been identified in the GRUB2 bootloader's network module tha...
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
Scope: local
bookworm: open
bullseye: open
forky: open
sid: resolved (fixed in 2.14-1)
trixie: open
GHSA
GHSA-r6f8-x3mw-2qp5: A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk
ghsa_unreviewed·2025-11-18
CVE-2025-54770 [MEDIUM] CWE-825 GHSA-r6f8-x3mw-2qp5: A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk
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
OSV
CVE-2025-54770: A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk
osv·2025-11-18·CVSS 4.9
CVE-2025-54770 [MEDIUM] CVE-2025-54770: A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk
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
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-11-18
Published