CVE-2025-54770: Grub2: use-after-free in net_set_vlan
CSIRTS triage
- What
- A use-after-free vulnerability exists in the net_set_vlan function of GRUB2.
- Who is affected
- Systems using GRUB2 as bootloader in affected versions.
- Urgency
- Medium severity (CVSS 4.9) but not exploited; boot security is still important.
- Action
- Update GRUB2 to a patched version when available.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54770
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2025-547700.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-54770 | coverage & exploitation status | NVD · CVE.org |
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