CVE-2026-29642
- Source
- https://cve.org/CVERecord?id=CVE-2026-29642
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-29642.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-29642
- Published
- 2026-04-20T00:00:00Z
- Modified
- 2026-08-12T03:51:13.274523169Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- Database specific
{ "cna_assigner": "mitre", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29642.json" }- References
-
- https://docs.riscv.org/reference/isa/priv/machine.html
- https://docs.riscv.org/reference/isa/priv/priv-csrs.html
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29642.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-29642
- https://github.com/OpenXiangShan/XiangShan/issues/3934
- https://github.com/OpenXiangShan/XiangShan/commit/5e3dd63