CVE-2024-21977

LOW
INFO Priority: 0.01 BB Relevance: 26/100
Published: 2025-09-05 Modified: 2026-11-09 First seen: 2026-11-09 Status: active

Attack Surface

Low Complexity No Interaction Scope Change

CVSS Vector Breakdown

AV: Local
AC: Low
PR: High
UI: None
S: Changed
C: None
I: Low
A: None

Description

Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade the entropy of the RDRAND instruction, potentially resulting in loss of integrity for SEV-SNP guests.

Weakness Classification (1)

Bug Bounty Relevance

26 / 100
✓ Low complexity
✓ No user interaction

CVSS Score

3.2 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N

EPSS — Exploitation Probability

0.16%
Raw Score 0.001560
Percentile 4.8%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00156
2026-11-12
0.00156
2026-11-10
0.00156
2026-11-09
0.00156
2026-11-08
0.00156

Intelligence Sources

nvd ref →