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VulnerabilityPublished Updated

CVE-2026-29649: NEMU Has a

Source CVE Database V5

0

Not known to be exploited · CVSS 9.8 Critical.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

AI-suggested

Users should monitor vendor communications for updates and consider restricting untrusted machine-mode writes to menvcfg registers if possible as a precaution.

Description

NEMU has a vulnerability in its RISC-V Hypervisor CSR handling where certain hypervisor environment configuration bits are incorrectly updated due to a machine-mode write to a related control register. This flaw can cause improper enforcement of virtualization settings, potentially leading to unexpected traps or denial of service during cache-block management instructions in virtualized environments. The vulnerability has a critical CVSS score of 9.8, indicating high impact on confidentiality, integrity, and availability. No patch or official remediation guidance is currently available.

References

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