CVE-2025-54770
4.9 MEDIUMA vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk
Published: 2025-11-18 · Last updated: 2026-05-19
Severity and scoring
- CVSS
- 4.9 MEDIUM
- Vector
- CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
- CWE
- CWE-825
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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2025-54770
- [Other]https://access.redhat.com/security/cve/CVE-2025-54770
- [Other]https://bugzilla.redhat.com/show_bug.cgi?id=2413813
- [Other]https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html
- [Other]http://www.openwall.com/lists/oss-security/2025/11/18/4
Related CVEs
Same CWE
- CVE-2026-8854 — IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_mem_cache (7.5 HIGH)
- CVE-2026-34001 — A flaw was found in the X.Org X server (7.8 HIGH)
- CVE-2025-61664 — A vulnerability in the GRUB2 bootloader has been identified in the normal module (4.9 MEDIUM)
- CVE-2025-54771 — A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader) (4.9 MEDIUM)
- CVE-2025-49795 — A NULL pointer dereference vulnerability was found in libxml2 when processing XPath XML expressions (7.5 HIGH)