CVE-2025-54770
CVE-2025-54770 is a medium-severity vulnerability with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-825.
Key facts
- Severity: Medium (CVSS 3.x base score 4.9)
- EPSS exploit prediction: 0% (3rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-198077
- Weakness: CWE-825
- Published:
- Last modified:
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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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
Frequently asked questions
- What is 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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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
- How severe is CVE-2025-54770?
- CVE-2025-54770 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2025-54770 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-54770?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-54770 have an EU (EUVD) identifier?
- Yes. CVE-2025-54770 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198077.
- When was CVE-2025-54770 published?
- CVE-2025-54770 was published on 2025-11-18 and last updated on 2026-06-30.
References
- https://access.redhat.com/security/cve/CVE-2025-54770
- https://bugzilla.redhat.com/show_bug.cgi?id=2413813
- https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html
- http://www.openwall.com/lists/oss-security/2025/11/18/4
Other CWE-825 vulnerabilities
- CVE-2026-53006 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in icmpv6_rcv() Caching…
- CVE-2025-49794 — Critical (CVSS 9.1): A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain…
- CVE-2026-52952 — High (CVSS 8.8): In the Linux kernel, the following vulnerability has been resolved: iommu: Fix WARN_ON in…
- CVE-2026-53085 — High (CVSS 7.8): In the Linux kernel, the following vulnerability has been resolved: bpf: fix mm lifecycle in open-coded task_vma…
- CVE-2026-53033 — High (CVSS 7.8): In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Take state lock for af_unix…
- CVE-2026-52976 — High (CVSS 7.8): In the Linux kernel, the following vulnerability has been resolved: drm/xe: Fix error cleanup in…