CVE-2025-54770 | 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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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

Published: 2025-11-18 Last update: 2026-06-30 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-54770 is rated Low Risk (20.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.12%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-54770

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.01% 0.12% +0.11%
2 2025-11-19 — 0.01% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-54770

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.9 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 1.4 3.4 [email protected]

Weakness enumeration for CVE-2025-54770

GitHub Security Advisory for CVE-2025-54770

GHSA-r6f8-x3mw-2qp5 · Severity: medium — A vulnerability has been identified in the GRUB2 bootloader's network module that poses an...

OS Trackers for CVE-2025-54770

vendor priority summary link
debian not yet assigned CVE-2025-54770 not yet assigned priority: Debian including 1 source packages (grub2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. https://security-tracker.debian.org/tracker/CVE-2025-54770
redhat medium — https://access.redhat.com/security/cve/CVE-2025-54770
suse medium CVE-2025-54770 severity moderate: SUSE including 334 source package names (2.1.3-4.14:grub2-2.12-slfo.1.1_3.1, 2.1.3-4.14:grub2-i386-pc-2.12-slfo.1.1_3.1, …), 972 product×package rows across 176 product lines (Container suse/manager/5.0/x86_64/server, Container suse/multi-linux-manager/5.1/x86_64/server, … (176 product lines)): Fixed 732, Known Affected 231, First Fixed 9. https://www.suse.com/security/cve/CVE-2025-54770/
ubuntu medium CVE-2025-54770 medium priority: Ubuntu including 3 source packages (grub2, grub2-signed, grub2-unsigned), 26 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): needs-triage 15, not-affected 7, ignored 4. https://ubuntu.com/security/CVE-2025-54770

Affected software / configurations for CVE-2025-54770

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2025-54770

cvelogic Threat Intelligence