CVE-2026-29642
HIGH EPSS 1.6%
Published Apr 20, 20262mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
Published Apr 20, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
1.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-1244
References 4
- docs.riscv.org https://docs.riscv.org/reference/isa/priv/machine.html
- docs.riscv.org https://docs.riscv.org/reference/isa/priv/priv-csrs.html
- github.com https://github.com/OpenXiangShan/XiangShan/commit/5e3dd63
- github.com https://github.com/OpenXiangShan/XiangShan/issues/3934
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.