CVE-2023-20593

Exp

An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information.

Published: 2023-07-24 Last update: 2025-02-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-20593 is rated High Exploit Risk (69.6/100): CVSS Medium severity, with high exploitation likelihood (EPSS 8.63%, 93th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2023-20593

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2023-20593

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-11 8.44% 8.63% +0.19%
2 2026-05-29 8.24% 8.44% +0.20%
3 2026-05-28 — 8.24% —

Full EPSS history (38 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-20593

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.8 3.6 [email protected]

Weakness enumeration for CVE-2023-20593

OS Trackers for CVE-2023-20593

vendor priority summary link
alpine — CVE-2023-20593: 1 source package rows (xen); 63 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 56. https://security.alpinelinux.org/vuln/CVE-2023-20593
debian not yet assigned CVE-2023-20593 not yet assigned priority: Debian including 2 source packages (amd64-microcode, linux), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 10. https://security-tracker.debian.org/tracker/CVE-2023-20593
redhat medium — https://access.redhat.com/security/cve/CVE-2023-20593
suse medium — https://www.suse.com/security/cve/CVE-2023-20593/
ubuntu high CVE-2023-20593 high priority: Ubuntu including 169 source packages (amd64-microcode, linux, …), 1996 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1512, released 250, not-affected 127, ignored 105, needed 2. https://ubuntu.com/security/CVE-2023-20593

Affected software / configurations for CVE-2023-20593

Vendor Product Version Raw CPE
xen xen 4.14.0 cpe:2.3:o:xen:xen:4.14.0:*:*:*:*:*:x86:*
xen xen 4.15.0 cpe:2.3:o:xen:xen:4.15.0:*:*:*:*:*:x86:*
xen xen 4.16.0 cpe:2.3:o:xen:xen:4.16.0:*:*:*:*:*:x86:*
xen xen 4.17.0 cpe:2.3:o:xen:xen:4.17.0:*:*:*:*:*:x86:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
debian debian_linux 11.0 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
debian debian_linux 12.0 cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*
amd ryzen_3_3100_firmware — cpe:2.3:o:amd:ryzen_3_3100_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3300x_firmware — cpe:2.3:o:amd:ryzen_3_3300x_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_3500_firmware — cpe:2.3:o:amd:ryzen_5_3500_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_3500x_firmware — cpe:2.3:o:amd:ryzen_5_3500x_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_3600_firmware — cpe:2.3:o:amd:ryzen_5_3600_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_3600x_firmware — cpe:2.3:o:amd:ryzen_5_3600x_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_3600xt_firmware — cpe:2.3:o:amd:ryzen_5_3600xt_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_3700x_firmware — cpe:2.3:o:amd:ryzen_7_3700x_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_3800x_firmware — cpe:2.3:o:amd:ryzen_7_3800x_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_3800xt_firmware — cpe:2.3:o:amd:ryzen_7_3800xt_firmware:-:*:*:*:*:*:*:*
amd ryzen_9_3900_firmware — cpe:2.3:o:amd:ryzen_9_3900_firmware:-:*:*:*:*:*:*:*
amd ryzen_9_3900x_firmware — cpe:2.3:o:amd:ryzen_9_3900x_firmware:-:*:*:*:*:*:*:*
amd ryzen_9_3900xt_firmware — cpe:2.3:o:amd:ryzen_9_3900xt_firmware:-:*:*:*:*:*:*:*
amd ryzen_9_3950x_firmware — cpe:2.3:o:amd:ryzen_9_3950x_firmware:-:*:*:*:*:*:*:*
amd ryzen_9_pro_3900_firmware — cpe:2.3:o:amd:ryzen_9_pro_3900_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_pro_3995wx_firmware — cpe:2.3:o:amd:ryzen_threadripper_pro_3995wx_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_pro_3975wx_firmware — cpe:2.3:o:amd:ryzen_threadripper_pro_3975wx_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_pro_3955wx_firmware — cpe:2.3:o:amd:ryzen_threadripper_pro_3955wx_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_pro_3945wx_firmware — cpe:2.3:o:amd:ryzen_threadripper_pro_3945wx_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_3990x_firmware — cpe:2.3:o:amd:ryzen_threadripper_3990x_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_3970x_firmware — cpe:2.3:o:amd:ryzen_threadripper_3970x_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_3960x_firmware — cpe:2.3:o:amd:ryzen_threadripper_3960x_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_4700g_firmware — cpe:2.3:o:amd:ryzen_7_4700g_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_4700ge_firmware — cpe:2.3:o:amd:ryzen_7_4700ge_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_4600g_firmware — cpe:2.3:o:amd:ryzen_5_4600g_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_4600ge_firmware — cpe:2.3:o:amd:ryzen_5_4600ge_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_4300g_firmware — cpe:2.3:o:amd:ryzen_3_4300g_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_4300ge_firmware — cpe:2.3:o:amd:ryzen_3_4300ge_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_pro_4450u_firmware — cpe:2.3:o:amd:ryzen_3_pro_4450u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_pro_4350ge_firmware — cpe:2.3:o:amd:ryzen_3_pro_4350ge_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_pro_4350g_firmware — cpe:2.3:o:amd:ryzen_3_pro_4350g_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_pro_4200g_firmware — cpe:2.3:o:amd:ryzen_3_pro_4200g_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_pro_4650ge_firmware — cpe:2.3:o:amd:ryzen_5_pro_4650ge_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_pro_4650g_firmware — cpe:2.3:o:amd:ryzen_5_pro_4650g_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_pro_4400g_firmware — cpe:2.3:o:amd:ryzen_5_pro_4400g_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_pro_4750u_firmware — cpe:2.3:o:amd:ryzen_7_pro_4750u_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_pro_4750ge_firmware — cpe:2.3:o:amd:ryzen_7_pro_4750ge_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_pro_4750g_firmware — cpe:2.3:o:amd:ryzen_7_pro_4750g_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_5700u_firmware — cpe:2.3:o:amd:ryzen_7_5700u_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_5500u_firmware — cpe:2.3:o:amd:ryzen_5_5500u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_5300u_firmware — cpe:2.3:o:amd:ryzen_3_5300u_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_7520u_firmware — cpe:2.3:o:amd:ryzen_5_7520u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_7320u_firmware — cpe:2.3:o:amd:ryzen_3_7320u_firmware:-:*:*:*:*:*:*:*
amd athlon_gold_7220u_firmware — cpe:2.3:o:amd:athlon_gold_7220u_firmware:-:*:*:*:*:*:*:*
amd epyc_7232p_firmware — cpe:2.3:o:amd:epyc_7232p_firmware:-:*:*:*:*:*:*:*
amd epyc_7302p_firmware — cpe:2.3:o:amd:epyc_7302p_firmware:-:*:*:*:*:*:*:*
amd epyc_7402p_firmware — cpe:2.3:o:amd:epyc_7402p_firmware:-:*:*:*:*:*:*:*
amd epyc_7502p_firmware — cpe:2.3:o:amd:epyc_7502p_firmware:-:*:*:*:*:*:*:*
amd epyc_7702p_firmware — cpe:2.3:o:amd:epyc_7702p_firmware:-:*:*:*:*:*:*:*
amd epyc_7252_firmware — cpe:2.3:o:amd:epyc_7252_firmware:-:*:*:*:*:*:*:*
amd epyc_7262_firmware — cpe:2.3:o:amd:epyc_7262_firmware:-:*:*:*:*:*:*:*
amd epyc_7272_firmware — cpe:2.3:o:amd:epyc_7272_firmware:-:*:*:*:*:*:*:*
amd epyc_7282_firmware — cpe:2.3:o:amd:epyc_7282_firmware:-:*:*:*:*:*:*:*
amd epyc_7302_firmware — cpe:2.3:o:amd:epyc_7302_firmware:-:*:*:*:*:*:*:*
amd epyc_7352_firmware — cpe:2.3:o:amd:epyc_7352_firmware:-:*:*:*:*:*:*:*
amd epyc_7402_firmware — cpe:2.3:o:amd:epyc_7402_firmware:-:*:*:*:*:*:*:*
amd epyc_7452_firmware — cpe:2.3:o:amd:epyc_7452_firmware:-:*:*:*:*:*:*:*
amd epyc_7502_firmware — cpe:2.3:o:amd:epyc_7502_firmware:-:*:*:*:*:*:*:*
amd epyc_7532_firmware — cpe:2.3:o:amd:epyc_7532_firmware:-:*:*:*:*:*:*:*
amd epyc_7542_firmware — cpe:2.3:o:amd:epyc_7542_firmware:-:*:*:*:*:*:*:*
amd epyc_7552_firmware — cpe:2.3:o:amd:epyc_7552_firmware:-:*:*:*:*:*:*:*
amd epyc_7642_firmware — cpe:2.3:o:amd:epyc_7642_firmware:-:*:*:*:*:*:*:*
amd epyc_7662_firmware — cpe:2.3:o:amd:epyc_7662_firmware:-:*:*:*:*:*:*:*
amd epyc_7702_firmware — cpe:2.3:o:amd:epyc_7702_firmware:-:*:*:*:*:*:*:*
amd epyc_7742_firmware — cpe:2.3:o:amd:epyc_7742_firmware:-:*:*:*:*:*:*:*
amd epyc_7h12_firmware — cpe:2.3:o:amd:epyc_7h12_firmware:-:*:*:*:*:*:*:*
amd epyc_7f32_firmware — cpe:2.3:o:amd:epyc_7f32_firmware:-:*:*:*:*:*:*:*
amd epyc_7f52_firmware — cpe:2.3:o:amd:epyc_7f52_firmware:-:*:*:*:*:*:*:*
amd epyc_7f72_firmware — cpe:2.3:o:amd:epyc_7f72_firmware:-:*:*:*:*:*:*:*

References for CVE-2023-20593

URL Tags
http://seclists.org/fulldisclosure/2023/Jul/43 Not Applicable
http://www.openwall.com/lists/oss-security/2023/07/24/3 Mailing List
http://www.openwall.com/lists/oss-security/2023/07/25/1 Mailing List
http://www.openwall.com/lists/oss-security/2023/07/25/12 Mailing List
http://www.openwall.com/lists/oss-security/2023/07/25/13 Mailing List
http://www.openwall.com/lists/oss-security/2023/07/25/14 Mailing List
http://www.openwall.com/lists/oss-security/2023/07/25/15 Mailing List
http://www.openwall.com/lists/oss-security/2023/07/25/16 Mailing List
http://www.openwall.com/lists/oss-security/2023/07/25/17 Mailing List
http://www.openwall.com/lists/oss-security/2023/07/25/5 Mailing List
http://www.openwall.com/lists/oss-security/2023/07/25/6 Mailing List
http://www.openwall.com/lists/oss-security/2023/07/26/1 Mailing List Mitigation Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/07/31/2 Mailing List Mitigation Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/08/08/6
http://www.openwall.com/lists/oss-security/2023/08/08/7
http://www.openwall.com/lists/oss-security/2023/08/08/8
http://www.openwall.com/lists/oss-security/2023/08/16/4
http://www.openwall.com/lists/oss-security/2023/08/16/5
http://www.openwall.com/lists/oss-security/2023/09/22/11
http://www.openwall.com/lists/oss-security/2023/09/22/9
http://www.openwall.com/lists/oss-security/2023/09/25/4
http://www.openwall.com/lists/oss-security/2023/09/25/7
http://xenbits.xen.org/xsa/advisory-433.html Mitigation Patch Vendor Advisory
https://cmpxchg8b.com/zenbleed.html Exploit
https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html Mailing List
https://lists.debian.org/debian-lts-announce/2023/07/msg00033.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/08/msg00001.html
https://lists.fedoraproject.org/archives/list/[email protected]/message/CP6WQO3CDPLE5O635N7TAL5KCZ6HZ4FE/
https://lists.fedoraproject.org/archives/list/[email protected]/message/HKKYIK2EASDNUV4I7EFJKNBVO3KCKGRR/
https://lists.fedoraproject.org/archives/list/[email protected]/message/SD2G74BXS2SWOE3FIQJ6X76S3A7PDGML/
https://security.netapp.com/advisory/ntap-20240531-0004/
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7008 Vendor Advisory
https://www.debian.org/security/2023/dsa-5459 Third Party Advisory
https://www.debian.org/security/2023/dsa-5461 Third Party Advisory
https://www.debian.org/security/2023/dsa-5462 Third Party Advisory
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