CVE-2026-29642
Summary
| CVE | CVE-2026-29642 |
|---|---|
| State | PUBLISHED |
| Assigner | mitre |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-04-20 21:16:19 UTC |
| Updated | 2026-04-20 21:16:19 UTC |
| 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. |
Risk And Classification
Problem Types: n/a
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/OpenXiangShan/XiangShan/commit/5e3dd63 | [email protected] | github.com | |
| github.com/OpenXiangShan/XiangShan/issues/3934 | [email protected] | github.com | |
| docs.riscv.org/reference/isa/priv/machine.html | [email protected] | docs.riscv.org | |
| docs.riscv.org/reference/isa/priv/priv-csrs.html | [email protected] | docs.riscv.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.