VulnSocial

CVE-2026-29646Disclosure

LOWCVSS 9.8 · CRITICAL

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to the supervisor interrupt-enable CSR (sie) may be handled incorrectly and can influence machine-level interrupt enable state (mie). This breaks privilege/virtualization isolation and can lead to denial of service or privilege-boundary violation in environments relying on NEMU for correct interrupt virtualization.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-267

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • 2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-04-21: 2Technical Details · 2026-04-21: 204-21
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
By indicator
Full discourse2 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-29646 In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to the supervisor interrupt-enable CSR (sie) may b… https://www.cve.org/CVERecord?id=CVE-2026-29646 ----- Traducción: CVE-2026-29646 En … http://infoflow.cloud`

    Post summary

    The post announces CVE-2026-29646 with a brief description of the fault and provides a link to the official CVE record, but offers no exploit code, evidence of exploitation, or remediation advice.

    0000033
    72 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-29646 In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to the supervisor interrupt-enable CSR (sie) may b… https://www.cve.org/CVERecord?id=CVE-2026-29646

    Post summary

    The excerpt briefly describes CVE‑2026‑29646 as a write‑to‑CSR vulnerability in OpenXiangShan NEMU when RVH is enabled, but contains no PoC, exploit, or patch information.

    00000116
    57.2K followersView on X

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