What’s Vulnerable › Vulnerabilities

CVE-2026-29648

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-20 · updated 2026-06-17
• Weakness: CWE-269

Description

In OpenXiangShan NEMU, when Smstateen is enabled, clearing mstateen0.ENVCFG does not correctly restrict access to henvcfg and senvcfg. As a result, less-privileged code may read or write these CSRs without the required exception, potentially bypassing intended state-enable based isolation controls in virtualized or multi-privilege environments.

References

• https://docs.riscv.org/reference/isa/priv/smstateen.html
• https://github.com/OpenXiangShan/NEMU/issues/690
• https://github.com/OpenXiangShan/XiangShan/pull/3978
• https://github.com/OpenXiangShan/NEMU/issues/690

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