# CVE-2024-21963: CVE-2024-21963

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

An out-of-bounds read vulnerability in the IOMMU could allow a malicious guest to corrupt hypervisor (HV) pages and potentially cause a host crash leading to loss of availability.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- AMD / AMD EPYC™ 7003 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ 7002 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ 9004 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ 7001 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ 4004 Series Processors: ComboAM5PI 1.2.0.3g (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ 9005 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ 8004 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ 4005 Series Processors: ComboAM5PI 1.2.0.3g (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ 8005 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors: ChagallWSPI-sWRX8 1.0.0.D (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics: CezannePI-FP6_1.0.1.1d (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Threadripper™ 7000 WX-Series Processors: StormPeakPI-SP6_1.1.0.0k (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 9000HX Series Processors: FireRangeFL1PI 1.0.0.0c (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ AI 300 Series Processors: StrixKrackanPI-FP8_1.1.0.0d (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ AI Max 300 Series Processors: StrixHaloPI-FP11_1.0.0.1c (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics: ComboAM4v2PI 1.2.0.10 (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 9000 Series Desktop Processors: ComboAM5PI 1.2.0.3g (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics: PhoenixPI-FP8-FP7_1.2.0.0e (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Threadripper™ 9000 Series: ShimadaPeakPI-SP6 1.0.0.1b (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 8040 Series Mobile Processors with Radeon™ Graphics: PhoenixPI-FP8-FP7_1.2.0.0e (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Z2 Series Processors: PhoenixPI-FP8-FP7_1.2.0.0e (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics: RenoirPI-FP6 1.0.0.Ed (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics: RembrandtPI-FP7_1.0.0.Bf (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors: ChagallWSPI-sWRX8 1.0.0.D (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics: MendocinoPI-FT6_1.0.0.7f (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics: DragonRangeFL1PI 1.0.0.3j (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ AI 300 Series Processors: StrixKrackanPI-FP8_1.1.0.2.b (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Threadripper™ PRO 7000 WX-Series Processors: StormPeakPI-SP6 1.0.0.1m (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 4000 Series Desktop Processors: ComboAM4v2PI 1.2.0.10 (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 5000 Series Desktop Processors: ComboAM4v2PI 1.2.0.10 (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 2000 Mobile Processors: ComboAM4v2PI 1.2.0.10 (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 8000 Series Desktop Processors: ComboAM5PI 1.2.0.3g (unaffected); ComboAM5PI 1.1.0.3d (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Z1 Series Processors: ComboAM5PI 1.2.0.3g (unaffected); ComboAM5 1.0.0.c (unaffected); ComboAM5PI 1.1.0.3d (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ 7000 Series Desktop Processors: ComboAM5PI 1.2.0.3g (unaffected); ComboAM5 1.0.0.c (unaffected); ComboAM5PI 1.1.0.3d (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ Embedded 3000 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ Embedded 7002 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ Embedded 7003 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa"): Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Embedded 7000 Series Processors: EmbeddedAM5PI 1.0.0.5 (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Embedded 8000 Series Processors: EmbeddedPhoenixPI-FP7r2_1.0.0.3 (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Embedded 5000 Series Processors: EmbAM4PI 1.0.0.9 (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Embedded V2000A Series Processors: EmbeddedV2KAPI-FP6 1.0.0.A (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Embedded V2000 Series Processors: EmbeddedPI-FP6_1.0.0.D (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen™ Embedded V3000 Series Processors: Embedded-PI_FP7r2 1.0.1.1 (unaffected). Source: CNA: AMD
- AMD / AMD Ryzen Embedded V3000 EDKII Series Processors: Embedded-PI_FP7r2 1.0.0.D (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ Embedded 9005 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Bergamo"): Linux kernel upstream (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ Embedded 8004 Series Processors: Linux kernel upstream (unaffected). Source: CNA: AMD

## Severity and prioritization

- CVSS 4.0: 6 (medium); CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N; source: CNA: AMD

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-125

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4018.html (CNA: AMD)

- https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3060.html (CNA: AMD)

- http://xenbits.xen.org/xsa/advisory-524.html (ADP: CVE)

- http://www.openwall.com/lists/oss-security/2026/11/10/21 (ADP: CVE)

## Provenance

- CNA: AMD: https://www.cve.org/CVERecord?id=CVE-2024-21963; retrieved 2026-11-12; source updated 2026-11-12

Revision: cdefc4a2ab08031119609722e3e6633eb070a63313e6d768eaeadd1b977033f1

Canonical: https://y2.dev/cve/CVE-2024-21963

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