CVE-2026-97631
TianoCore EDK2
- TianoCore EDK2
- Critical
- CVSS 9.5
- EPSS 0.43%
- No fixed version listed
What to do
No fixed version listed
Affected products
| Product | Affected | Fixed in |
|---|---|---|
| TianoCore EDK2 | through edk2-stable202608 | None listed |
Scores and signals
- Exploitation
- No known exploitation
- Severity
- Critical, CVSS 9.5 (v4.0, scored by TianoCore)
- EPSS
- 0.43% chance of exploitation in the next 30 days (EPSS from FIRST, as of Oct 23, 2026)
- Weakness
- CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'); CWE-131: Incorrect calculation of buffer size; CWE-787: Out-of-bounds write
- Vendor
- TianoCore, EDK2
Timeline
- First listed as critical by cve.now. Affected and fixed versions come from the CVE record, once one is published.