CVE catalog
CVE-2018-3640
intel-microcode: CVE-2018-3640
- Severity
- Medium · CVSS 4.3
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 7.27% · Oct 27, 2026
Systems with microprocessors utilizing speculative execution and that perform speculative reads of system registers may allow unauthorized disclosure of system parameters to an attacker with local user access via a side-channel analysis, aka Rogue System Register Read (RSRE), Variant 3a.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | intel-microcode | sid | 3.20260227.1 | fixed |
| Debian | intel-microcode | forky | 3.20260227.1 | fixed |
| Debian | intel-microcode | trixie | 3.20251111.1~deb13u1 | fixed |
| Debian | intel-microcode | trixie-security | 3.20250812.1~deb13u1 | fixed |
| Debian | intel-microcode | bookworm | 3.20251111.1~deb12u1 | fixed |
| Debian | intel-microcode | bookworm-security | 3.20250812.1~deb12u1 | fixed |
| Ubuntu | intel-microcode | 14.04 | 1.20130906.1ubuntu2 | vulnerable |
| Ubuntu | intel-microcode | 14.04 | 1.20130906.1ubuntu3 | vulnerable |
| Ubuntu | intel-microcode | 14.04 | 2.20140122.1 | vulnerable |
| Ubuntu | intel-microcode | 14.04 | 2.20140430.1ubuntu1 | vulnerable |
| Ubuntu | intel-microcode | 14.04 | 2.20140624-t-1ubuntu2 | vulnerable |
| Ubuntu | intel-microcode | 14.04 | 3.20180108.0~ubuntu14.04.2 | vulnerable |
| Ubuntu | intel-microcode | 14.04 | 3.20180108.0+really20170707ubuntu14.04.1 | vulnerable |
| Ubuntu | intel-microcode | 14.04 | 3.20180312.0~ubuntu14.04.1 | vulnerable |
| Ubuntu | intel-microcode | 14.04 | 3.20180425.1~ubuntu0.14.04.1 | vulnerable |
| Ubuntu | intel-microcode | 14.04 | 3.20180425.1~ubuntu0.14.04.2 | vulnerable |
| Ubuntu | intel-microcode | 14.04 | 3.20180807a.0ubuntu0.14.04.1 | fixed |
| Ubuntu | intel-microcode | 16.04 | 3.20150121.1 | vulnerable |
| Ubuntu | intel-microcode | 16.04 | 3.20151106.1 | vulnerable |
| Ubuntu | intel-microcode | 16.04 | 3.20170707.1~ubuntu16.04.0 | vulnerable |
| Ubuntu | intel-microcode | 16.04 | 3.20180108.0~ubuntu16.04.2 | vulnerable |
| Ubuntu | intel-microcode | 16.04 | 3.20180108.0+really20170707ubuntu16.04.1 | vulnerable |
| Ubuntu | intel-microcode | 16.04 | 3.20180312.0~ubuntu16.04.1 | vulnerable |
| Ubuntu | intel-microcode | 16.04 | 3.20180425.1~ubuntu0.16.04.1 | vulnerable |
| Ubuntu | intel-microcode | 16.04 | 3.20180425.1~ubuntu0.16.04.2 | vulnerable |
| Ubuntu | intel-microcode | 16.04 | 3.20180807a.0ubuntu0.16.04.1 | fixed |
| Ubuntu | intel-microcode | 18.04 | 3.20170707.1 | vulnerable |
| Ubuntu | intel-microcode | 18.04 | 3.20171117.1 | vulnerable |
| Ubuntu | intel-microcode | 18.04 | 3.20180108.1 | vulnerable |
| Ubuntu | intel-microcode | 18.04 | 3.20180108.1+really20171117.1 | vulnerable |
| Ubuntu | intel-microcode | 18.04 | 3.20180312.0~ubuntu18.04.1 | vulnerable |
| Ubuntu | intel-microcode | 18.04 | 3.20180425.1~ubuntu0.18.04.1 | vulnerable |
| Ubuntu | intel-microcode | 18.04 | 3.20180425.1~ubuntu0.18.04.2 | vulnerable |
| Ubuntu | intel-microcode | 18.04 | 3.20180807a.0ubuntu0.18.04.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | intel-microcode | source | sid | 3.20180703.1 | not yet assigned | Not reported | Not reported |
| Debian | intel-microcode | source | forky | 3.20180703.1 | not yet assigned | Not reported | Not reported |
| Debian | intel-microcode | source | trixie | 3.20180703.1 | not yet assigned | Not reported | Not reported |
| Debian | intel-microcode | source | bookworm | 3.20180703.1 | not yet assigned | Not reported | Not reported |
| Ubuntu | intel-microcode | deb | 14.04 | 3.20180807a.0ubuntu0.14.04.1 | Not reported | UBUNTU-CVE-2018-3640 | Not reported |
| Ubuntu | intel-microcode | deb | 16.04 | 3.20180807a.0ubuntu0.16.04.1 | Not reported | UBUNTU-CVE-2018-3640 | Not reported |
| Ubuntu | intel-microcode | deb | 18.04 | 3.20180807a.0ubuntu0.18.04.1 | Not reported | UBUNTU-CVE-2018-3640 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [intel-microcode]Fixed
Details (1)
3.20251111.1~deb12u1· amd64 · bookwormFixed · Fixed:
3.20180703.1dsa · intel-microcode · debian · bookworm; dsa · intel-microcode · debian · 12
[Debian 13 (Trixie)]
- [intel-microcode]Fixed
Details (1)
3.20251111.1~deb13u1· amd64 · trixieFixed · Fixed:
3.20180703.1dsa · intel-microcode · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11242-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2018-3640]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2018-3640]
- [https://security-tracker.debian.org/tracker/CVE-2018-3640]
- [https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-3640.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2018/wid-sec-w-2023-2072.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]