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NVD / CVE Program· CNA AMD

CVE-2023-20593: An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information

Noroxi assessment

Priority: Monitor (action score 24/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 5% (FIRST EPSS); higher than 92.3% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: bpftool (AlmaLinux:8) 4.18.0-477.27.2.el8_8; iwl100-firmware (AlmaLinux:8) 39.31.5.1-117.el8_8.1.alma.1; iwl1000-firmware (AlmaLinux:8) 1:39.31.5.1-117.el8_8.1.alma.1.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to bpftool (AlmaLinux:8) 4.18.0-477.27.2.el8_8; iwl100-firmware (AlmaLinux:8) 39.31.5.1-117.el8_8.1.alma.1; iwl1000-firmware (AlmaLinux:8) 1:39.31.5.1-117.el8_8.1.alma.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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

MediumCVSS 5.5 · v3.1—Proof of concept Fix available
Published
Jul 24, 2023
Updated
Jun 17, 2026
EPSS
5.0% · 92th percentile

Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 5.0%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-20593

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
xenxen
amdepyc 7h12 firmware
debiandebian linux
amdryzen 3 3100 firmware
amdryzen 3 3100
amdryzen 3 3300x firmware
amdryzen 3 3300x
amdryzen 5 3500 firmware
amdryzen 5 3500
amdryzen 5 3500x firmware
amdryzen 5 3500x
amdryzen 5 3600 firmware

and 128 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • amd athlon gold 7220u firmwareall versions
  • amd epyc 7232p firmwareall versions
  • amd epyc 7252 firmwareall versions
  • amd epyc 7262 firmwareall versions
  • amd epyc 7272 firmwareall versions
  • amd epyc 7282 firmwareall versions
  • amd epyc 7302 firmwareall versions
  • amd epyc 7302p firmwareall versions
  • amd epyc 7352 firmwareall versions
  • amd epyc 7402 firmwareall versions
  • amd epyc 7402p firmwareall versions
  • amd epyc 7452 firmwareall versions
  • amd epyc 7502 firmwareall versions
  • amd epyc 7502p firmwareall versions
  • amd epyc 7532 firmwareall versions
  • amd epyc 7542 firmwareall versions
  • amd epyc 7552 firmwareall versions
  • amd epyc 7642 firmwareall versions
  • amd epyc 7662 firmwareall versions
  • amd epyc 7702 firmwareall versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (AMD). Independent of NVD's CPE analysis and usually ahead of it.

  • AMD 2nd Gen AMD EPYC™ Processors

    • variousaffected

  • AMD 3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT

    • variousaffected

  • AMD AMD Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics “Renoir” AM4

    • variousaffected

  • AMD Ryzen™ 3000 Series Desktop Processors “Matisse” AM4

    • variousaffected

  • AMD Ryzen™ 4000 Series Mobile processors with Radeon™ Graphics “Renoir”

    • variousaffected

  • AMD Ryzen™ 5000 Series Mobile processors with Radeon™ Graphics “Lucienne”

    • variousaffected

  • AMD Ryzen™ 7020 Series processors “Mendocino” FT6

    • variousaffected

  • AMD Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS SP3

    • variousaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-477.27.2.el8_84.18.0-477.27.2.el8_8
AlmaLinux:8iwl100-firmwarebefore 39.31.5.1-117.el8_8.1.alma.139.31.5.1-117.el8_8.1.alma.1
AlmaLinux:8iwl1000-firmwarebefore 1:39.31.5.1-117.el8_8.1.alma.11:39.31.5.1-117.el8_8.1.alma.1
AlmaLinux:8iwl105-firmwarebefore 18.168.6.1-117.el8_8.1.alma.118.168.6.1-117.el8_8.1.alma.1
AlmaLinux:8iwl135-firmwarebefore 18.168.6.1-117.el8_8.1.alma.118.168.6.1-117.el8_8.1.alma.1
AlmaLinux:8iwl2000-firmwarebefore 18.168.6.1-117.el8_8.1.alma.118.168.6.1-117.el8_8.1.alma.1
AlmaLinux:8iwl2030-firmwarebefore 18.168.6.1-117.el8_8.1.alma.118.168.6.1-117.el8_8.1.alma.1
AlmaLinux:8iwl3160-firmwarebefore 1:25.30.13.0-117.el8_8.1.alma.11:25.30.13.0-117.el8_8.1.alma.1
AlmaLinux:8iwl3945-firmwarebefore 15.32.2.9-117.el8_8.1.alma.115.32.2.9-117.el8_8.1.alma.1
AlmaLinux:8iwl4965-firmwarebefore 228.61.2.24-117.el8_8.1.alma.1228.61.2.24-117.el8_8.1.alma.1
AlmaLinux:8iwl5000-firmwarebefore 8.83.5.1_1-117.el8_8.1.alma.18.83.5.1_1-117.el8_8.1.alma.1
AlmaLinux:8iwl5150-firmwarebefore 8.24.2.2-117.el8_8.1.alma.18.24.2.2-117.el8_8.1.alma.1
AlmaLinux:8iwl6000-firmwarebefore 9.221.4.1-117.el8_8.1.alma.19.221.4.1-117.el8_8.1.alma.1
AlmaLinux:8iwl6000g2a-firmwarebefore 18.168.6.1-117.el8_8.1.alma.118.168.6.1-117.el8_8.1.alma.1
AlmaLinux:8iwl6000g2b-firmwarebefore 18.168.6.1-117.el8_8.1.alma.118.168.6.1-117.el8_8.1.alma.1
AlmaLinux:8iwl6050-firmwarebefore 41.28.5.1-117.el8_8.1.alma.141.28.5.1-117.el8_8.1.alma.1
AlmaLinux:8iwl7260-firmwarebefore 1:25.30.13.0-117.el8_8.1.alma.11:25.30.13.0-117.el8_8.1.alma.1
AlmaLinux:8kernelbefore 4.18.0-477.27.2.el8_84.18.0-477.27.2.el8_8
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-477.27.2.el8_84.18.0-477.27.2.el8_8
AlmaLinux:8kernel-corebefore 4.18.0-477.27.2.el8_84.18.0-477.27.2.el8_8
AlmaLinux:8kernel-cross-headersbefore 4.18.0-477.27.2.el8_84.18.0-477.27.2.el8_8
AlmaLinux:8kernel-debugbefore 4.18.0-477.27.2.el8_84.18.0-477.27.2.el8_8
AlmaLinux:8kernel-debug-corebefore 4.18.0-477.27.2.el8_84.18.0-477.27.2.el8_8
AlmaLinux:8kernel-debug-develbefore 4.18.0-477.27.2.el8_84.18.0-477.27.2.el8_8

+96

Same product

xen: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-10921The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, whi
    41Plan
  • CVE-2017-10920The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host
    41Plan
  • CVE-2017-10918Xen through 4.8.x does not validate memory allocations during certain P2M operations, which allows guest OS users to obtain privileged host
    41Plan

Published before and after this one in the same product

  • ← EarlierCVE-2022-42335Apr 25, 2023 · x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted P
    31Monitor
  • ← EarlierCVE-2022-42336May 16, 2023 · Mishandling of guest SSBD selection on AMD hardware The current logic to set SSBD on AMD Family 17h and Hygon Family 18h processors requires
    13Monitor
  • Later →CVE-2023-34321Jan 5, 2024 · arm32: The cache may not be properly cleaned/invalidated
    13Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:iwl100-firmware39.31.5.1-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:iwl1000-firmware1:39.31.5.1-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:iwl105-firmware18.168.6.1-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:iwl135-firmware18.168.6.1-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:iwl2000-firmware18.168.6.1-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:iwl2030-firmware18.168.6.1-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:iwl3160-firmware1:25.30.13.0-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:iwl5000-firmware8.83.5.1_1-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:iwl5150-firmware8.24.2.2-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:iwl6000g2a-firmware18.168.6.1-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:iwl6000g2b-firmware18.168.6.1-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:iwl6050-firmware41.28.5.1-135.el9_2.alma.1 · AlmaLinux:9Package registry (OSV)
alpine:xen4.15.4-r1 · Alpine:v3.15Package registry (OSV)
debian:amd64-microcode3.20230719.1~deb12u1 · Debian:12Package registry (OSV)
debian:linux6.1.38-2 · Debian:12Package registry (OSV)
debian:linux-5.105.10.179-3~deb10u1 · Debian:10Package registry (OSV)
opensuse:dtb-aarch645.14.21-150400.24.74.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:kernel-64kb5.14.21-150400.24.74.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:kernel-debug5.14.21-150400.24.74.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:kernel-default5.14.21-150400.24.74.1 · openSUSE:Leap Micro 5.3Package registry (OSV)
opensuse:kernel-default-base5.14.21-150400.24.74.1.150400.24.33.3 · openSUSE:Leap Micro 5.3Package registry (OSV)
opensuse:kernel-docs5.14.21-150400.24.74.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:kernel-firmware20230724-150500.3.3.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-kvmsmall5.14.21-150400.24.74.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:kernel-obs-build5.14.21-150400.24.74.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:kernel-obs-qa5.14.21-150400.24.74.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:kernel-source5.14.21-150400.24.74.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:kernel-syms5.14.21-150400.24.74.1 · openSUSE:Leap 15.4Package registry (OSV)
red hat:bpftool0:3.10.0-957.105.1.el7 · Red Hat:rhel_aus:7.6::serverPackage registry (OSV)
red hat:kernel0:3.10.0-957.105.1.el7 · Red Hat:rhel_aus:7.6::serverPackage registry (OSV)

+27

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:82023-07-26
Proof-of-concept repository on GitHubstars:172026-05-12

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+1 d
  3. TodayNov 7, 2026+1202 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-209 · Generation of Error Message Containing Sensitive Information

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records