CVE-2026-97631Pre-boot RCE in EDK II PXE driver
Updated under an hour ago ()
Does this affect you?
It affects TianoCore EDK2. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.43%, higher than 37% of scored CVEs.
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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.
- CVSS
- 9.5 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- Weakness (CWE)
- CWE-120, CWE-131, CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.43% (percentile 37)
- Assigned by
- TianoCore
- NVD analysis
- Deferred
- Record last updated
- Oct 22, 2026
- First seen by InfoSec Signals
- Oct 22, 2026
Affected products
TianoCore EDK2 tianocore:edk2 (from the name) | through edk2-stable202608 | CNA record |
References
- https://github.com/tianocore/edk2/security/advisories/GHSA-99cj-7hg9-mp4m
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.