PT-2026-33840 · Unknown · Openxiangshan Nemu

Published 2026-04-20 · Updated 2026-04-21 · CVE-2026-29647

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions OpenXiangShan NEMU (affected versions not specified)

Description Insufficient Smstateen permission enforcement allows lower-privileged code to access IMSIC state through the 'stopei' and 'vstopei' CSRs, even when the mstateen0.IMSIC variable is cleared. This may lead to cross-context information leakage or the disruption of interrupt handling.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

CVE-2026-29647

Affected Products

Openxiangshan Nemu

References · 5

• 🔥 https://github.com/OpenXiangShan/NEMU/issues/691 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-29647 · Security Note
• https://github.com/OpenXiangShan/XiangShan/pull/3978 · Note
• https://docs.riscv.org/reference/isa/priv/smstateen.html#state-enable-0-registers · Note
• https://twitter.com/CVEnew/status/2046601519248687327 · Twitter Post