🛡️ CVE-2026-29642
🟠 CVSS 7.8 — High ✅ No Known Exploit CWE-1244 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-1244
Public Exploit ✅ No
Source NVD
Published 2026-04-20
Updated 2026-06-02
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

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