What’s Vulnerable › Vulnerabilities

CVE-2021-36148

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-02 · updated 2026-06-17
• Weakness: CWE-120

Description

An issue was discovered in ACRN before 2.5. dmar_free_irte in hypervisor/arch/x86/vtd.c allows an irte_alloc_bitmap buffer overflow.

Affected products

• Linux Acrn: before 2.5 — fixed in 2.5

How to fix

Upgrade to a fixed version: Linux Acrn 2.5. Check the vendor advisory for mitigations.

References

• https://github.com/projectacrn/acrn-hypervisor/commit/25c0e3817eb332660dd63d1d4522e63dcc94e79a
• https://github.com/projectacrn/acrn-hypervisor/commit/25c0e3817eb332660dd63d1d4522e63dcc94e79a

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