{"id":"CVE-2021-46766","aliases":["EUVD-2021-33422","GHSA-34xr-h92c-2m86","SUSE-SU-2023:4654-1","SUSE-SU-2023:4655-1","SUSE-SU-2023:4660-1","SUSE-SU-2023:4664-1","SUSE-SU-2023:4665-1","SUSE-SU-2024:2376-1"],"status":"published","title":"Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged...","description":"Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.","severity":{"version":"3.1","score":2.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00228,"percentile":0.13671,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-459"],"published":"2023-11-14T18:51:58Z","modified":"2026-06-17T04:15:29Z","affected":[{"source":"osv","ecosystem":"SUSE:Linux 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9003"},{"vendor":"amd","product":"epyc_9124_firmware"},{"vendor":"amd","product":"epyc_9174f_firmware"},{"vendor":"amd","product":"epyc_9184x_firmware"},{"vendor":"amd","product":"epyc_9224_firmware"},{"vendor":"amd","product":"epyc_9254_firmware"},{"vendor":"amd","product":"epyc_9274f_firmware"},{"vendor":"amd","product":"epyc_9334_firmware"},{"vendor":"amd","product":"epyc_9354_firmware"},{"vendor":"amd","product":"epyc_9354p_firmware"},{"vendor":"amd","product":"epyc_9374f_firmware"},{"vendor":"amd","product":"epyc_9384x_firmware"},{"vendor":"amd","product":"epyc_9454_firmware"},{"vendor":"amd","product":"epyc_9454p_firmware"},{"vendor":"amd","product":"epyc_9474f_firmware"},{"vendor":"amd","product":"epyc_9534_firmware"},{"vendor":"amd","product":"epyc_9554_firmware"},{"vendor":"amd","product":"epyc_9554p_firmware"},{"vendor":"amd","product":"epyc_9634_firmware"},{"vendor":"amd","product":"epyc_9654_firmware"},{"vendor":"amd","product":"epyc_9654p_firmware"},{"vendor":"amd","product":"epyc_9684x_firmware"},{"vendor":"amd","product":"epyc_9734_firmware"},{"vendor":"amd","product":"epyc_9754_firmware"},{"vendor":"amd","product":"epyc_9754s_firmware"},{"vendor":"amd","product":"ryzen_threadripper_pro_3945wx_firmware"},{"vendor":"amd","product":"ryzen_threadripper_pro_3955wx_firmware"},{"vendor":"amd","product":"ryzen_threadripper_pro_3975wx_firmware"},{"vendor":"amd","product":"ryzen_threadripper_pro_3995wx_firmware"},{"vendor":"amd","product":"ryzen™ threadripper™ pro 3000wx series processors  “chagall” ws"}],"references":[{"url":"https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4002","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3002","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-5001","tags":["vendor-advisory","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-46766"},{"url":"https://github.com/advisories/GHSA-34xr-h92c-2m86"},{"url":"https://www.suse.com/support/update/announcement/2023/suse-su-20234654-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1215823","tags":["report"]},{"url":"https://bugzilla.suse.com/1215831","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2021-26345","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-46766","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-46774","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-23820","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-23830","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-20519","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-20521","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-20526","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-20533","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-20566","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-20592","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2023/suse-su-20234655-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2023/suse-su-20234660-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2023/suse-su-20234664-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2023/suse-su-20234665-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2024/suse-su-20242376-1/","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-46766","description":"Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.","status":"published","published":"2023-11-14T18:51:58.036Z","modified":"2024-08-04T05:17:42.287Z","cvss":[{"version":"3.1","score":2.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N","level":"low","assessor":"cna"}],"updated_at":"2026-11-02T14:33:02.930115Z"}],"euvd":[{"id":"EUVD-2021-33422","description":"Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.","status":"published","published":"2023-11-14T18:51:58Z","modified":"2024-08-04T05:17:42Z","cvss":[{"version":"3.1","score":2.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-03T03:08:22.448202Z"}],"ghsa":[{"id":"GHSA-34xr-h92c-2m86","title":"Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged...","description":"Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.\n","status":"published","published":"2023-11-14T21:30:59Z","modified":"2024-02-13T21:30:23Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-459"],"updated_at":"2026-11-02T14:55:37.270786Z"}],"nvd":[{"id":"CVE-2021-46766","description":"Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.","status":"published","published":"2023-11-14T19:15:10.36Z","modified":"2026-06-17T04:15:29.92Z","cvss":[{"version":"3.1","score":2.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N","level":"low","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-459"],"updated_at":"2026-11-02T14:07:07.764332Z"}],"osv":[{"id":"SUSE-SU-2023:4654-1","title":"Security update for kernel-firmware","description":"This update for kernel-firmware fixes the following issues:\n\nUpdate AMD ucode to 20231030 (bsc#1215831):\n\n- CVE-2022-23820: Failure to validate the AMD SMM communication buffer may allow an attacker to corrupt the SMRAM potentially leading to arbitrary code execution.\n- CVE-2021-46774: Insufficient input validation in ABL may enable a privileged attacker to perform arbitrary DRAM writes, potentially resulting in code execution and privilege escalation.\n- CVE-2023-20533: Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker using DMA to read/write from/to invalid DRAM address potentially resulting in denial-of-service.\n0 CVE-2023-20519: A Use-After-Free vulnerability in the management of an SNP guest context page may allow a malicious hypervisor to masquerade as the guest's migration agent resulting in a potential loss of guest integrity.\n- CVE-2023-20566: Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integrity.\n- CVE-2023-20521: 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 service.\n- CVE-2021-46766: Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.\n- CVE-2022-23830: SMM configuration may not be immutable, as intended, when SNP is enabled resulting in a potential limited loss of guest memory integrity.\n- CVE-2023-20526: Insufficient input validation in the ASP Bootloader may enable a privileged attacker with physical access to expose the contents of ASP memory potentially leading to a loss of confidentiality.\n- CVE-2021-26345: Failure to validate the value in APCB may allow an attacker with physical access to tamper with the APCB token to force an out-of-bounds memory read potentially resulting in a denial of service.\n- CVE-2023-20592: Issue with INVD instruction aka CacheWarpAttack (bsc#1215823).\n","status":"published","published":"2023-12-06T10:35:24Z","modified":"2026-02-04T04:19:12.854753Z","updated_at":"2026-11-02T15:53:53.865042Z"},{"id":"SUSE-SU-2023:4655-1","title":"Security update for kernel-firmware","description":"This update for kernel-firmware fixes the following issues:\n\nUpdate AMD ucode to 20231030 (bsc#1215831):\n\n- CVE-2022-23820: Failure to validate the AMD SMM communication buffer may allow an attacker to corrupt the SMRAM potentially leading to arbitrary code execution.\n- CVE-2021-46774: Insufficient input validation in ABL may enable a privileged attacker to perform arbitrary DRAM writes, potentially resulting in code execution and privilege escalation.\n- CVE-2023-20533: Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker using DMA to read/write from/to invalid DRAM address potentially resulting in denial-of-service.\n0 CVE-2023-20519: A Use-After-Free vulnerability in the management of an SNP guest context page may allow a malicious hypervisor to masquerade as the guest's migration agent resulting in a potential loss of guest integrity.\n- CVE-2023-20566: Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integrity.\n- CVE-2023-20521: 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 service.\n- CVE-2021-46766: Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.\n- CVE-2022-23830: SMM configuration may not be immutable, as intended, when SNP is enabled resulting in a potential limited loss of guest memory integrity.\n- CVE-2023-20526: Insufficient input validation in the ASP Bootloader may enable a privileged attacker with physical access to expose the contents of ASP memory potentially leading to a loss of confidentiality.\n- CVE-2021-26345: Failure to validate the value in APCB may allow an attacker with physical access to tamper with the APCB token to force an out-of-bounds memory read potentially resulting in a denial of service.\n- CVE-2023-20592: Issue with INVD instruction aka CacheWarpAttack (bsc#1215823).\n","status":"published","published":"2023-12-06T10:35:37Z","modified":"2026-02-04T04:31:04.776727Z","updated_at":"2026-11-02T15:53:53.865042Z"},{"id":"SUSE-SU-2023:4660-1","title":"Security update for kernel-firmware","description":"This update for kernel-firmware fixes the following issues:\n\nUpdate AMD ucode to 20231030 (bsc#1215831):\n\n- CVE-2022-23820: Failure to validate the AMD SMM communication buffer may allow an attacker to corrupt the SMRAM potentially leading to arbitrary code execution.\n- CVE-2021-46774: Insufficient input validation in ABL may enable a privileged attacker to perform arbitrary DRAM writes, potentially resulting in code execution and privilege escalation.\n- CVE-2023-20533: Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker using DMA to read/write from/to invalid DRAM address potentially resulting in denial-of-service.\n0 CVE-2023-20519: A Use-After-Free vulnerability in the management of an SNP guest context page may allow a malicious hypervisor to masquerade as the guest's migration agent resulting in a potential loss of guest integrity.\n- CVE-2023-20566: Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integrity.\n- CVE-2023-20521: 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 service.\n- CVE-2021-46766: Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.\n- CVE-2022-23830: SMM configuration may not be immutable, as intended, when SNP is enabled resulting in a potential limited loss of guest memory integrity.\n- CVE-2023-20526: Insufficient input validation in the ASP Bootloader may enable a privileged attacker with physical access to expose the contents of ASP memory potentially leading to a loss of confidentiality.\n- CVE-2021-26345: Failure to validate the value in APCB may allow an attacker with physical access to tamper with the APCB token to force an out-of-bounds memory read potentially resulting in a denial of service.\n- CVE-2023-20592: Issue with INVD instruction aka CacheWarpAttack (bsc#1215823).\n","status":"published","published":"2023-12-06T12:06:17Z","modified":"2026-02-04T04:17:37.137883Z","updated_at":"2026-11-02T15:53:53.865042Z"},{"id":"SUSE-SU-2023:4664-1","title":"Security update for kernel-firmware","description":"This update for kernel-firmware fixes the following issues:\n\nUpdate AMD ucode to 20231030 (bsc#1215831):\n\n- CVE-2022-23820: Failure to validate the AMD SMM communication buffer may allow an attacker to corrupt the SMRAM potentially leading to arbitrary code execution.\n- CVE-2021-46774: Insufficient input validation in ABL may enable a privileged attacker to perform arbitrary DRAM writes, potentially resulting in code execution and privilege escalation.\n- CVE-2023-20533: Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker using DMA to read/write from/to invalid DRAM address potentially resulting in denial-of-service.\n0 CVE-2023-20519: A Use-After-Free vulnerability in the management of an SNP guest context page may allow a malicious hypervisor to masquerade as the guest's migration agent resulting in a potential loss of guest integrity.\n- CVE-2023-20566: Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integrity.\n- CVE-2023-20521: 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 service.\n- CVE-2021-46766: Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.\n- CVE-2022-23830: SMM configuration may not be immutable, as intended, when SNP is enabled resulting in a potential limited loss of guest memory integrity.\n- CVE-2023-20526: Insufficient input validation in the ASP Bootloader may enable a privileged attacker with physical access to expose the contents of ASP memory potentially leading to a loss of confidentiality.\n- CVE-2021-26345: Failure to validate the value in APCB may allow an attacker with physical access to tamper with the APCB token to force an out-of-bounds memory read potentially resulting in a denial of service.\n- CVE-2023-20592: Issue with INVD instruction aka CacheWarpAttack (bsc#1215823).\n","status":"published","published":"2023-12-06T12:34:02Z","modified":"2026-02-04T02:46:36.112137Z","updated_at":"2026-11-02T15:53:53.865042Z"},{"id":"SUSE-SU-2023:4665-1","title":"Security update for kernel-firmware","description":"This update for kernel-firmware fixes the following issues:\n\nUpdate AMD ucode to 20231030 (bsc#1215831):\n\n- CVE-2022-23820: Failure to validate the AMD SMM communication buffer may allow an attacker to corrupt the SMRAM potentially leading to arbitrary code execution.\n- CVE-2021-46774: Insufficient input validation in ABL may enable a privileged attacker to perform arbitrary DRAM writes, potentially resulting in code execution and privilege escalation.\n- CVE-2023-20533: Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker using DMA to read/write from/to invalid DRAM address potentially resulting in denial-of-service.\n0 CVE-2023-20519: A Use-After-Free vulnerability in the management of an SNP guest context page may allow a malicious hypervisor to masquerade as the guest's migration agent resulting in a potential loss of guest integrity.\n- CVE-2023-20566: Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integrity.\n- CVE-2023-20521: 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 service.\n- CVE-2021-46766: Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.\n- CVE-2022-23830: SMM configuration may not be immutable, as intended, when SNP is enabled resulting in a potential limited loss of guest memory integrity.\n- CVE-2023-20526: Insufficient input validation in the ASP Bootloader may enable a privileged attacker with physical access to expose the contents of ASP memory potentially leading to a loss of confidentiality.\n- CVE-2021-26345: Failure to validate the value in APCB may allow an attacker with physical access to tamper with the APCB token to force an out-of-bounds memory read potentially resulting in a denial of service.\n- CVE-2023-20592: Issue with INVD instruction aka CacheWarpAttack (bsc#1215823).\n","status":"published","published":"2023-12-06T12:35:09Z","modified":"2026-02-04T03:34:42.008994Z","updated_at":"2026-11-02T15:53:53.865042Z"},{"id":"SUSE-SU-2024:2376-1","title":"Security update for kernel-firmware","description":"This update for kernel-firmware fixes the following issues:\n\nUpdate AMD ucode to 20231030 (bsc#1215831):\n\n- CVE-2022-23820: Failure to validate the AMD SMM communication buffer may allow an attacker to corrupt the SMRAM potentially leading to arbitrary code execution.\n- CVE-2021-46774: Insufficient input validation in ABL may enable a privileged attacker to perform arbitrary DRAM writes, potentially resulting in code execution and privilege escalation.\n- CVE-2023-20533: Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker using DMA to read/write from/to invalid DRAM address potentially resulting in denial-of-service.\n0 CVE-2023-20519: A Use-After-Free vulnerability in the management of an SNP guest context page may allow a malicious hypervisor to masquerade as the guest's migration agent resulting in a potential loss of guest integrity.\n- CVE-2023-20566: Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integrity.\n- CVE-2023-20521: 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 service.\n- CVE-2021-46766: Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.\n- CVE-2022-23830: SMM configuration may not be immutable, as intended, when SNP is enabled resulting in a potential limited loss of guest memory integrity.\n- CVE-2023-20526: Insufficient input validation in the ASP Bootloader may enable a privileged attacker with physical access to expose the contents of ASP memory potentially leading to a loss of confidentiality.\n- CVE-2021-26345: Failure to validate the value in APCB may allow an attacker with physical access to tamper with the APCB token to force an out-of-bounds memory read potentially resulting in a denial of service.\n- CVE-2023-20592: Issue with INVD instruction aka CacheWarpAttack (bsc#1215823).\n","status":"published","published":"2024-07-09T17:20:51Z","modified":"2026-02-04T03:54:31.78821Z","updated_at":"2026-11-02T15:53:55.136363Z"}]}}