CVE-2025-37820: xen-netfront: handle NULL returned by xdp_convert_buff_to_frame()
CSIRTS triage
- What
- A NULL pointer dereference in the xen-netfront driver when xdp_convert_buff_to_frame() returns NULL.
- Who is affected
- Systems using Xen paravirtualized network frontend driver.
- Urgency
- Medium urgency; CVSS 5.5 (medium severity), potential for denial of service on affected deployments.
- Action
- Apply patches that add proper NULL checks in xdp_convert_buff_to_frame() handling.
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-2025-37820
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-2025-378200.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-37820 | coverage & exploitation status | NVD · CVE.org |
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