Vulnerability Name:

CVE-2021-26313 (CCN-203194)

Assigned:2021-06-08
Published:2021-06-08
Updated:2022-08-01
Summary:Potential speculative code store bypass in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution of overwritten instructions, may cause an incorrect speculation and could result in data leakage.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-203
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2021-26313

Source: CCN
Type: Xen Security Advisory XSA-375
Speculative Code Store Bypass

Source: XF
Type: UNKNOWN
xen-cve202126313-info-disc(203194)

Source: MISC
Type: Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1003

Vulnerable Configuration:Configuration 1:
  • cpe:/o:xen:xen:*:*:*:*:*:*:*:*
  • AND
  • cpe:/h:amd:ryzen_7_2700x:-:*:*:*:*:*:*:*
  • OR cpe:/h:amd:ryzen_threadripper_2990wx:-:*:*:*:*:*:*:*
  • OR cpe:/h:amd:ryzen_5_5600x:-:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/h:arm:cortex-a72:-:*:*:*:*:*:*:*
  • OR cpe:/h:broadcom:bcm2711:-:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/h:intel:core_i7-7700k:-:*:*:*:*:*:*:*
  • OR cpe:/h:intel:xeon_silver_4214:-:*:*:*:*:*:*:*
  • OR cpe:/h:intel:core_i9-9900k:-:*:*:*:*:*:*:*
  • OR cpe:/h:intel:core_i7-10700k:-:*:*:*:*:*:*:*

    • Configuration 4:
  • cpe:/o:debian:debian_linux:10.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:xensource:xen:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    xen xen *
    amd ryzen 7 2700x -
    amd ryzen threadripper 2990wx -
    amd ryzen 5 5600x -
    arm cortex-a72 -
    broadcom bcm2711 -
    intel core i7-7700k -
    intel xeon silver 4214 -
    intel core i9-9900k -
    intel core i7-10700k -
    debian debian linux 10.0
    xensource xen *