CVE•Published 2026-04-20•Modified 2026-04-24•1 article on news•6 live references•NVD data
CVE-2026-29649Xiangshan · Nemu
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
5
Exploit Prediction Scoring System · top 95% of all CVEs
Weaknesses (CWE)
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).
Timeline
Published 2026-04-20
Modified 2026-04-24
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-29649Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Xiangshan Nemu"All exposed Xiangshan Nemu instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Nemu"HTTP body or banner mentions "Nemu" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-29649Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-29649Censys host search filtered to this CVE id.
grep.app
CVE-2026-29649Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-29649GitHub code search for direct mentions.
Google dork
"CVE-2026-29649" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.