CVE-2025-21456

HIGH
MEDIUM Priority: 0.01 BB Relevance: 41/100
Published: 2025-08-06 Modified: 2026-11-03 First seen: 2026-11-03 Status: active

Attack Surface

Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

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

Description

Memory corruption while processing IOCTL command when multiple threads are called to map/unmap buffer concurrently.

Weakness Classification (1)

Bug Bounty Relevance

41 / 100
✓ Low complexity
✓ No user interaction

CVSS Score

7.8 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.10%
Raw Score 0.001000
Percentile 0.9%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00100
2026-11-13
0.00100
2026-11-12
0.00100
2026-11-10
0.00100
2026-11-09
0.00100
2026-11-08
0.00100
2026-11-07
0.00100
2026-11-06
0.00093
2026-11-05
0.00093
2026-11-04
0.00093
2026-11-03
0.00093

Intelligence Sources

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