Pre-boot RCE in EDK II PXE driver (TianoCore EDK2)
En bref
- Source
- NVD
- EPSS
- EPSS 0.64 % · centile 50 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- TianoCore
- Statut NVD
- Deferred
Rechercher sur…
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.
Faiblesses (CWE)
- CWE-120 — Copie de tampon sans vérification de taille (débordement classique)
- CWE-131 — Calcul incorrect de la taille d'un tampon
- CWE-787 — Écriture hors limites
Références
- https://github.com/tianocore/edk2/security/advisories/GHSA-99cj-7hg9-mp4m
- https://arstechnica.com/security/2026/10/code-execution-flaw-in-uefi-firmware-threatens-most-servers-on-planet-earth/
- https://news.ycombinator.com/item?id=50265393
- https://github.com/microsoft/mu_basecore/pull/1990
- https://github.com/microsoft/mu_basecore/pull/1989
- http://www.openwall.com/lists/oss-security/2026/10/28/4
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 4.0 | CRITICAL 9.5 | 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 | TianoCore |
| CVSS 4.0 | CRITICAL 9.5 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · infosec@edk2.groups.io (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-108230
- GCVE · GCVE-0-2026-97631
Produits affectés
| Produit | Versions |
|---|---|
| TianoCore · EDK2 | affected 0 ≤ edk2-stable202608 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |