Vulnerabilities

CVE-2026-97631

TianoCore EDK2: Buffer Copy without Checking Size of Input

Track
CVSS 9.5 Critical

What it is

Reported

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.

Source reported · Source: CVE record · Complete source description.

Dates

Source last published: 2026-10-22 16:32 UTC · Source last updated: 2026-10-31 19:08 UTC

What is affected

Reported

TianoCore; EDK2. Product-level identification only; no affected-version conclusion is available from this field.

Source reported · Source: CVE record

Dates

Source last published: 2026-10-22 16:32 UTC · Source last updated: 2026-10-31 19:08 UTC

Urgency and basis

Tracker computed

Track

Current priority score and EPSS: loading from the tracker record. They are read when this page loads and are not shown without JavaScript. They change daily and are not part of "Source last updated".

Tracker decision tier from the evidence detailed below

Dates

Source last updated: 2026-10-31 19:08 UTC

Exploitation evidence

Not reported

Not reported by tracked sources.

What to do

Not reported

Not reported by tracked sources.

Tracker inference. Guidance from the decision tier: No action now. Remediate within standard update timelines. Monitor for change.

Detection and validation

Mapped metadata availability only. These signals do not change priority.

Sigma, Atomic, Nuclei, and Metasploit: none mapped by tracked sources.

Sigma
Not mapped by tracked sources.
Atomic
Not mapped by tracked sources.
Nuclei
Not mapped by tracked sources.
Metasploit
Not mapped by tracked sources.

Evidence detail

Loading the full tracker evidence record…