CVE-2026-97631
Critical
Description
EDK2 contains a vulnerability in BIOS where a user may cause “Out-of-bounds Write”, Classic Buffer Overflow, and “Incorrect Calculation of Buffer Size” by remote access. Successful exploitation of this vulnerability can lead to arbitrary code execution. It could also impact Confidentiality, Integrity, and Availability.
SeverityCritical
CVSS9.5
Exploit probability—
Product
Microsoft Azl3 Edk2 20240524git3e722403cd16-21
PublishedOct 22, 2026
First seenOct 22, 2026
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft azl3_edk2_20240524git3e722403cd16-21 | No range specified | — |
| microsoft azl3_edk2_20240524git3e722403cd16-20 | No range specified | — |
| microsoft azl3_qemu_10.1.0-1 | No range specified | — |
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