Host denial of service via PCIe buffer bounds
Published Feb 12, 2026 · Updated Feb 12, 2026
Buffer-bounds error in AMD processor PCIe Link logic allows guest OS users to interrupt the host through a guest virtual machine. AMD identifies improper restriction of buffer operations in the PCIe Link but has not disclosed the affected structure or the out-of-bounds operation. Exploitation requires low-privileged guest access and specific runtime conditions; the published impact is host availability loss only.
Summary
What happened
Buffer-bounds error in AMD processor PCIe Link logic allows guest OS users to interrupt the host through a guest virtual machine. AMD identifies improper restriction of buffer operations in the PCIe Link but has not disclosed the affected structure or the out-of-bounds operation. Exploitation requires low-privileged guest access and specific runtime conditions; the published impact is host availability loss only.
The record
- CVE
- CVE-2024-21961
- Published
- Feb 12, 2026
- Updated
- Feb 12, 2026
- Vendor
- Advanced Micro Devices, Inc.
- Product
- AMD Ryzen™ 7000 Series Desktop Processors
- Classifications
- CWE-119, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 12, 2026CVE publishedPublication date reported by the CVE source.
- Feb 12, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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