CVE-2026-29642
HIGHDescription
A local attacker who can execute privileged CSR operations (or can induce firmware to do so) performs carefully crafted reads/writes to menvcfg (e.g., csrrs in M-mode). On affected XiangShan versions (commit aecf601e803bfd2371667a3fb60bfcd83c333027, 2024-11-19), these menvcfg accesses can unexpectedly set WPRI (reserved) bits in the status view (xstatus) to 1. RISC-V defines WPRI fields as "writes preserve values, reads ignore values," i.e., they must not be modified by software manipulating other fields, and menvcfg itself contains multiple WPRI fields.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Low risk: more likely to be exploited than 2% of all known CVEs.
References
Related Vulnerabilities
Other CWE-1244 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2020-5372 | High | 8.6 | 0.9% | - | Fix |
| CVE-2022-32259 | Medium | 6.5 | 0.6% | - | Fix |
| CVE-2025-42878 | High | 8.2 | 0.4% | - | - |
| CVE-2025-23252 | Medium | 4.5 | 0.3% | - | - |
| CVE-2024-0114 | High | 8.1 | 0.2% | - | - |
| CVE-2026-8989 | High | 8.6 | 0.2% | - | - |
Common questions
How do I fix CVE-2026-29642?
No published fix for CVE-2026-29642 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-29642 being actively exploited?
Not that we know of. CVE-2026-29642 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.11% is the estimated probability that it will be exploited in the next 30 days. That is higher than 2% of all scored CVEs.
How severe is CVE-2026-29642?
CVE-2026-29642 has a CVSS v3 base score of 7.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
Embed a live status badge for CVE-2026-29642
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-21.