CVE-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 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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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
Scoring
- Severity
- MEDIUM
- CVSS base score
- 4.9
- CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
- EPSS probability
- 0.15%
- CWE
- CWE-825
- Published
- 2025-11-18
- Last modified
- 2026-09-01
Affected products
- GNU grub2
Weakness type
Related vulnerabilities
- CVE-2026-77220 — PDFio < 1.6.5 Dangling Pointer via Dictionary String-Formatting
- CVE-2026-76891 — Expired Pointer Dereference in Wireshark
- CVE-2026-76890 — Expired Pointer Dereference in Wireshark
- CVE-2026-17523 — can: bcm: switch timer to HRTIMER_MODE_SOFT and remove hrtimer_tasklet
- CVE-2026-10671 — User thread can re-initialize an in-use `k_pipe`, corrupting kernel wait queues (`CONFIG_USERSPACE`)
- CVE-2026-54778 — CoreWCF: UnixDomainSocket Non-Reentrant POSIX Identity Resolution
- CVE-2026-58592 — Ladybird - Web-Reachable Code Execution via Dangling FunctionType Reference in WebAssembly ESM Integration
- CVE-2026-12610 — Sssd: use-after-free crash in sssd' 'sssd_pam' process