CVE-2021-26313 — Observable Timing Discrepancy in AMD ALL Supported Processors

CWE-208 — Observable Timing DiscrepancyCWE-203 — Observable DiscrepancyCWE-668 — Resource Exposure4 documents4 sources
Severity
5.5MEDIUMNVD
EPSS
0.1%
top 76.92%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
AMD ALL Supported ProcessorsXENDebian XEN+1 more
Timeline
PublishedJun 9
Latest updateMay 24

Description

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 vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NExploitability: 1.8 | Impact: 3.6

Affected Packages3 packages

▶CVEListV5amd/all_supported_processorsunspecified — undefined
▶debiandebian/xen< xen 4.14.2+25-gb6a8c4f72d-1 (bookworm)
▶Debianxen/xen< 4.14.2+25-gb6a8c4f72d-1+3

Also affects: Debian Linux 10.0

🔴Vulnerability Details

2
GHSA
GHSA-vj56-jg6h-3gpr: Potential speculative code store bypass in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution↗2022-05-24
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OSV
CVE-2021-26313: Potential speculative code store bypass in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution↗2021-06-09
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📋Vendor Advisories

1
Debian
CVE-2021-26313: xen - Potential speculative code store bypass in all supported CPU products, in conjun...↗2021
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