# TOCTOU in the ASP Bootloader may allow an attacker with physical access to tamper with SPI ROM records after memory content verification, potentially leading to loss of confidentiality or a denial of… CVE record · `CVE-2023-20521` - **Identifiers:** `CVE-2023-20521` - **State:** Confirmed - **Severity:** CVSS 3.3 Low - **Critical:** No - **CNA:** AMD - **Technologies:** [AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics “Picasso” AM4](https://agentprime.io/advisories/technology/amd-athlontm-3000-series-desktop-processors-with-radeontm-graphics-picasso-am4.md) · [AMD Ryzen™ Threadripper™ 2000 Series Processors “Colfax”](https://agentprime.io/advisories/technology/amd-ryzentm-threadrippertm-2000-series-processors-colfax.md) · [AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” FP5](https://agentprime.io/advisories/technology/amd-athlontm-3000-series-mobile-processors-with-radeontm-graphics-dali-dali-fp5.md) · [AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Pollock”](https://agentprime.io/advisories/technology/amd-athlontm-3000-series-mobile-processors-with-radeontm-graphics-pollock.md) · [AMD Ryzen™ 3000 Series Mobile Processor with Radeon™ Graphics “Picasso” FP5](https://agentprime.io/advisories/technology/amd-ryzentm-3000-series-mobile-processor-with-radeontm-graphics-picasso-fp5.md) · [1st Gen AMD EPYC™ Processors](https://agentprime.io/advisories/technology/1st-gen-amd-epyctm-processors.md) · [2nd Gen AMD EPYC™ Processors](https://agentprime.io/advisories/technology/2nd-gen-amd-epyctm-processors.md) · [3rd Gen AMD EPYC™ Processors](https://agentprime.io/advisories/technology/3rd-gen-amd-epyctm-processors.md) · [AMD EPYC™ Embedded 3000](https://agentprime.io/advisories/technology/amd-epyctm-embedded-3000.md) · [AMD EPYC™ Embedded 7002](https://agentprime.io/advisories/technology/amd-epyctm-embedded-7002.md) · [AMD EPYC™ Embedded 7003](https://agentprime.io/advisories/technology/amd-epyctm-embedded-7003.md) · [AMD Ryzen™ Embedded R1000](https://agentprime.io/advisories/technology/amd-ryzentm-embedded-r1000.md) · [AMD Ryzen™ Embedded R2000](https://agentprime.io/advisories/technology/amd-ryzentm-embedded-r2000.md) · [AMD Ryzen™ Embedded V1000](https://agentprime.io/advisories/technology/amd-ryzentm-embedded-v1000.md) - **Published:** 14 Nov 2023 - **Updated:** 2 Aug 2024 - **Reviewed by a person:** No Published by the CVE Program (CNA: AMD) at 14 Nov 2023, 18:52 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. ## Affected products, as the CNA wrote them - Vendor: AMD. Product: Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics “Picasso” AM4. - affected: `various` - Other versions: unaffected - Package name: `PI` - Vendor: AMD. Product: Ryzen™ Threadripper™ 2000 Series Processors “Colfax”. - affected: `various` - Other versions: unaffected - Package name: `PI` - Vendor: AMD. Product: Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” FP5. - affected: `various` - Other versions: unaffected - Package name: `PI` - Vendor: AMD. Product: Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Pollock”. - affected: `various` - Other versions: unaffected - Package name: `PI` - Vendor: AMD. Product: Ryzen™ 3000 Series Mobile Processor with Radeon™ Graphics “Picasso” FP5. - affected: `various` - Other versions: unaffected - Package name: `PI` - Vendor: AMD. Product: 1st Gen AMD EPYC™ Processors. - affected: `various` - Other versions: unaffected - Package name: `PI` - Vendor: AMD. Product: 2nd Gen AMD EPYC™ Processors. - affected: `various` - Other versions: unaffected - Package name: `PI` - Vendor: AMD. Product: 3rd Gen AMD EPYC™ Processors. - affected: `various` - Other versions: unaffected - Package name: `PI` - Vendor: AMD. Product: AMD EPYC™ Embedded 3000. - affected: `various` - Other versions: unaffected - Vendor: AMD. Product: AMD EPYC™ Embedded 7002. - affected: `various` - Other versions: unaffected - Vendor: AMD. Product: AMD EPYC™ Embedded 7003. - affected: `various` - Other versions: unaffected - Vendor: AMD. Product: AMD Ryzen™ Embedded R1000. - affected: `various` - Other versions: unaffected - Vendor: AMD. Product: AMD Ryzen™ Embedded R2000. - affected: `various` - Other versions: unaffected - Vendor: AMD. Product: AMD Ryzen™ Embedded V1000. - affected: `various` - Other versions: unaffected ## Not analysed yet We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter. ## Severity and exploitation - 3.3 Low, CVSS 3.1: `CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:L`, from CNA (AMD) - **CISA KEV:** Not listed. - **EPSS:** 0.0026, the 18th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline This record came from the full history of the CVE Program, published 14 Nov 2023. New records show when each source confirmed them. ## Sources - [CVE List: CVE-2023-20521](https://www.cve.org/CVERecord?id=CVE-2023-20521) - [NVD: CVE-2023-20521](https://nvd.nist.gov/vuln/detail/CVE-2023-20521) ### References from the CNA - (vendor-advisory) - (vendor-advisory) - (vendor-advisory) Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description. ## Check whether this affects you This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run. - With the agentprime MCP server (), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: - As JSON: - Everything that needs attention now: --- The web page: . Everything for agents: .