Dashboard / CVE-2026-29649

CVE-2026-29649

CRITICAL
INFO Priority: 0.04 BB Relevance: 80/100
Published: 2026-04-20 Modified: 2026-11-11 First seen: 2026-11-11 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

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

Description

NEMU contains an implementation flaw in its RISC-V Hypervisor CSR handling where henvcfg[7:4] (CBIE/CBCFE/CBZE-related fields) is incorrectly masked/updated based on menvcfg[7:4], so a machine-mode write to menvcfg can implicitly modify the hypervisor's environment configuration. This can lead to incorrect enforcement of virtualization configuration and may cause unexpected traps or denial of service when executing cache-block management instructions in virtualized contexts (V=1).

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
xiangshan nemu -

References & Advisories (4)

Bug Bounty Relevance

80 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.45%
Raw Score 0.004480
Percentile 39.5%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00448
2026-11-13
0.00448
2026-11-12
0.00448
2026-11-10
0.00448

Intelligence Sources

nvd ref →

External Links