medium 5.5

CVE-2022-21233 json

Improper isolation of shared resources in some Intel(R) Processors may allow a privileged user to potentially enable information disclosure…

published 2022-08-18 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-26459

cvss: 5.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits: 0; none known

Improper isolation of shared resources in some Intel(R) Processors may allow a privileged user to potentially enable information disclosure via local access.

Patch / fix

distros 7

debian ubuntu red hat suse opensuse alpine arch linux

intel-microcode Debian 14, Debian 13, Debian 12 3.20220809.1

debian advisories DEBIAN-CVE-2022-21233

intel-microcode Ubuntu 18.04 LTS 3.20220809.0ubuntu0.18.04.1
intel-microcode Ubuntu 20.04 LTS 3.20220809.0ubuntu0.20.04.1
intel-microcode Ubuntu 22.04 LTS 3.20220809.0ubuntu0.22.04.1
intel-microcode Ubuntu Pro 16.04 LTS 3.20230214.0ubuntu0.16.04.1+esm1

ubuntu advisories UBUNTU-CVE-2022-21233

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

kernel RHEL 7 3.10.0-1160.76.1.el7
perf RHEL 7 3.10.0-1160.76.1.el7
bpftool RHEL 7 3.10.0-1160.76.1.el7
python-perf RHEL 7 3.10.0-1160.76.1.el7
kernel-kdump RHEL 7 3.10.0-1160.76.1.el7
kernel-tools RHEL 7 3.10.0-1160.76.1.el7
kernel-tools-libs RHEL 7 3.10.0-1160.76.1.el7
kernel-bootwrapper RHEL 7 3.10.0-1160.76.1.el7

red hat advisories RHSA-2022:5937 RHSA-2022:5939

ucode-intel SLES 15 SP2-BCL, SLE Module for Basesystem 15 SP4, SLE Module for Basesystem 15 SP3 +13 more 20220809-150200.18.1
ucode-intel SLES for SAP 12 SP5, SLES 12 SP5 20220809-3.46.1
ucode-intel SLES for SAP 12 SP4, SLES 12 SP4-LTSS, SLES 12 SP3-BCL +3 more 20220809-13.101.1
ucode-intel SLES for SAP 15, SLE High Performance Computing 15-LTSS, SLE High Performance Computing 15-ESPOS 20220809-150000.3.78.1
ucode-intel SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +3 more 20220809-150100.3.214.1

suse advisories SUSE-SU-2022:2960-2 SUSE-SU-2022:2960-1 SUSE-SU-2022:2842-1 SUSE-SU-2022:2838-1 SUSE-SU-2022:2833-1 SUSE-SU-2022:2832-1

ucode-intel openSUSE Tumbleweed 20220809-1.1

opensuse advisories openSUSE-SU-2024:12254-1

intel-ucode Alpine 3.24, Alpine 3.23, Alpine 3.22 +9 more 20220809-r0

alpine advisories ALPINE-CVE-2022-21233

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

intel-ucode Arch Linux 20220809-1

arch linux advisories AVG-2795

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-21233 updated 2026-11-05 cvss 6.0

hw: cpu: Intel: Stale Data Read from legacy xAPIC vulnerability

Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
affected: workaround, no fix planned “Will not fix”
Red Hat Enterprise Linux 7 microcode_ctl Red Hat Enterprise Linux 8 microcode_ctl Red Hat Enterprise Linux 9 microcode_ctl
affected: workaround, no fix available
Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1160.76.1.el7, kernel 3.10.0-1160.76.1.el7, bpftool 3.10.0-1160.76.1.el7, python-perf 3.10.0-1160.76.1.el7, kernel-tools 3.10.0-1160.76.1.el7, kernel-tools-libs 3.10.0-1160.76.1.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.76.1.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.76.1.el7
fixed: vendor fix RHSA-2022:5937
Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-trace 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.76.1.rt56.1220.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-kvm 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-trace 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-debug-kvm 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-trace-kvm 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.76.1.rt56.1220.el7
fixed: vendor fix RHSA-2022:5939
Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1160.76.1.el7, kernel 3.10.0-1160.76.1.el7, bpftool 3.10.0-1160.76.1.el7, python-perf 3.10.0-1160.76.1.el7, kernel-kdump 3.10.0-1160.76.1.el7, kernel-tools 3.10.0-1160.76.1.el7, +7 more Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1160.76.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.76.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.76.1.el7 Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1160.76.1.el7, kernel 3.10.0-1160.76.1.el7, bpftool 3.10.0-1160.76.1.el7, python-perf 3.10.0-1160.76.1.el7, kernel-tools 3.10.0-1160.76.1.el7, kernel-tools-libs 3.10.0-1160.76.1.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.76.1.el7
fixed: vendor fix RHSA-2022:5937
Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-23-166-10 updated 2024-04-09 cvss 5.5

Siemens SIMATIC S7-1500 TM MFP BIOS

Siemens SIMATIC S7-1500 TM MFP - BIOS <V1.3.0
affected: fixed in V1.3.0, workaround support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 18 mo ago (2025-04-23)

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CNA	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

n/a Intel(R) Processors

References

intel.com /content/www/us/en/security-center/advisory/intel-sa-00657.html
mitigation, vendor-advisory
security.netapp.com /advisory/ntap-20220923-0002/
third-party-advisory
lists.debian.org /debian-lts-announce/2023/04/msg00000.html
mailing-list

Sources

CVE List CVE-2022-21233
NVD CVE-2022-21233

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary