Description
Sequence of processor instructions leads to unexpected behavior for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege and/or information disclosure and/or denial of service via local access.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Intel(R) Processors | See references | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | intel-microcode | 3.20231114.1 | — |
| Debian 13 | intel-microcode | 3.20231114.1 | — |
| Debian 12 | intel-microcode | 3.20231114.1~deb12u1 | DSA-5563-1 |
| Debian 11 | intel-microcode | 3.20231114.1~deb11u1 | DSA-5563-1 |
| Debian 10 | intel-microcode | 3.20231114.1~deb10u1 | DLA-3690-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | intel-microcode | 3.20231114.0ubuntu0.22.04.1 | USN-6485-1 |
| Ubuntu 20.04 LTS | intel-microcode | 3.20231114.0ubuntu0.20.04.1 | USN-6485-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | intel-microcode | 3.20231114.0ubuntu0.18.04.1+esm1 | USN-6485-1 |
| Ubuntu Pro 16.04 LTS | intel-microcode | 3.20231114.0ubuntu0.16.04.1+esm1 | USN-6485-1 |
| Ubuntu Pro 14.04 LTS | intel-microcode | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLES 15 SP4 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLES 15 SP3 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLES 15 SP2 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLES 15 SP1 | ucode-intel | 20231113-150100.3.228.1 | SUSE-SU-2023:4510-1, SUSE-SU-2023:4441-1 |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | ucode-intel | 20231113-128.1 | SUSE-SU-2023:4493-1, SUSE-SU-2023:4442-1 |
| SLES 11 SP4 | microcode_ctl | 1.17-102.83.81.1 | SUSE-SU-2025:1032-1 |
| SLES for SAP 15 SP3 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLES for SAP 15 SP2 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLES for SAP 15 SP1 | ucode-intel | 20231113-150100.3.228.1 | SUSE-SU-2023:4510-1, SUSE-SU-2023:4441-1 |
| SLES for SAP 12 SP5 | ucode-intel | 20231113-128.1 | SUSE-SU-2023:4493-1, SUSE-SU-2023:4442-1 |
| SLE Micro 5.5 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLE Micro 5.4 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLE Micro 5.3 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLE Micro 5.2 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLE Micro 5.1 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLE HPC 15 SP3 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLE HPC 15 SP2 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| SLE HPC 15 SP1 | ucode-intel | 20231113-150100.3.228.1 | SUSE-SU-2023:4510-1, SUSE-SU-2023:4441-1 |
| SUSE Manager Server 4.2 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4440-1 |
| SUSE Manager Proxy 4.2 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4440-1 |
| SUSE Enterprise Storage 7.1 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | spectre-meltdown-checker | 26.36.0602723-1.1 | openSUSE-SU-2026:11242-1 |
| openSUSE Tumbleweed | ucode-intel | 20231114-1.1 | openSUSE-SU-2024:13434-1 |
| openSUSE Leap 15.5 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| openSUSE Leap 15.4 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.4 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
| openSUSE Leap Micro 5.3 | ucode-intel | 20231113-150200.32.1 | SUSE-SU-2023:4500-1, SUSE-SU-2023:4440-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | intel-ucode | 20231114-r0 | — |
| Alpine v3.23 | intel-ucode | 20231114-r0 | — |
| Alpine v3.22 | intel-ucode | 20231114-r0 | — |
| Alpine v3.21 | intel-ucode | 20231114-r0 | — |
| Alpine v3.20 | intel-ucode | 20231114-r0 | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | intel-ucode | 20231114-r0 | — |
| Alpine v3.18 | intel-ucode | 20231114-r0 | — |
| Alpine v3.17 | intel-ucode | 20231114-r0 | — |
| Alpine v3.16 | intel-ucode | 20231114-r0 | — |
| Alpine v3.15 | intel-ucode | 20231114-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | microcode_ctl | 2:2.1-53.amzn2023.0.3 | ALAS2023-2023-436 |
| Amazon Linux 2 | microcode_ctl | 2:2.1-47.amzn2.4.15 | ALAS2-2023-2341 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | microcode_ctl | 4:20230808-2.0.2.el9 | ELSA-2023-12991 |
| Oracle Linux 8 | microcode_ctl | 4:20230808-2.0.2.el8 | ELSA-2023-12988 |
| Oracle Linux 7 | microcode_ctl | 2:2.1-73.19.0.3.el7_9 | ELSA-2023-12989 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
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Mav3r1ck0x1/CVE-2023-23583-Reptar- ★ 0 · Nov 22, 2023
This script can help determine the CPU ID for the processor of your system, please note that I have not added every CPU ID to this script, edit as needed.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 18
- openSUSE-SU-2026:11242-1 spectre-meltdown-checker-26.36.0602723-1.1 on GA media SUSE / openSUSE Security Updates · Jul 10, 2026
- USN-6485-1 intel-microcode vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-5563-1 intel-microcode - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3690-1 intel-microcode - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2023:4500-1 Security update for ucode-intel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4441-1 Security update for ucode-intel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13434-1 ucode-intel-20231114-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4440-1 Security update for ucode-intel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4442-1 Security update for ucode-intel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4493-1 Security update for ucode-intel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1032-1 Security update for microcode_ctl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4510-1 Security update for ucode-intel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-2906 Intel Prozessoren: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 26, 2025
- ALAS2023-2023-436 Important: microcode_ctl security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Mar 27, 2024
- ELSA-2023-12991 Important: microcode_ctl security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 16, 2023
- ALAS2-2023-2341 Important: microcode_ctl security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 15, 2023
- ELSA-2023-12988 Important: microcode_ctl security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 13, 2023
- ELSA-2023-12989 Important: microcode_ctl security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 13, 2023
References
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00950.html
- http://www.openwall.com/lists/oss-security/2023/11/14/8
- http://www.openwall.com/lists/oss-security/2023/11/14/6
- http://www.openwall.com/lists/oss-security/2023/11/14/4
- http://www.openwall.com/lists/oss-security/2023/11/14/5
- http://www.openwall.com/lists/oss-security/2023/11/14/7
- http://www.openwall.com/lists/oss-security/2023/11/14/9
- https://security.netapp.com/advisory/ntap-20231116-0015/
- https://www.debian.org/security/2023/dsa-5563
- https://lists.debian.org/debian-lts-announce/2023/12/msg00012.html