CVE catalog
CVE-2025-26403
Intel Microcode vulnerabilities
- Severity
- High · CVSS 7.2
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.14% · Oct 25, 2026
Out-of-bounds write in the memory subsystem for some Intel(R) Xeon(R) 6 processors when using Intel(R) SGX or Intel(R) TDX may allow a privileged user to potentially enable escalation of privilege via local access.
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 | noble | 3.20250812.1~deb12u1 | fixed |
| Ubuntu | intel-microcode | noble | 3.20250812.0ubuntu0.24.04.1 | fixed |
| Alpine | intel-ucode | 3.19 | 20250812-r0 | fixed |
| Alpine | intel-ucode | 3.20 | 20250812-r0 | fixed |
| Alpine | intel-ucode | 3.21 | 20250812-r0 | fixed |
| Alpine | intel-ucode | 3.22 | 20250812-r0 | fixed |
| Alpine | intel-ucode | 3.23 | 20250812-r0 | fixed |
| Alpine | intel-ucode | 3.24 | 20250812-r0 | fixed |
| Ubuntu | intel-microcode | pro | 3.20190918.1ubuntu1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20191115.1ubuntu1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20191115.1ubuntu2 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20191115.1ubuntu3 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20200609.0ubuntu0.20.04.0 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20200609.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20200609.0ubuntu0.20.04.2 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20201110.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20201110.0ubuntu0.20.04.2 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20210216.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20210608.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20220510.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20220809.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20230214.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20230808.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20231114.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20240514.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20240813.0ubuntu0.20.04.2 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20240910.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20241112.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20250211.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20250512.0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | intel-microcode | pro | 3.20250812.0ubuntu0.20.04.1+esm1 | fixed |
| Ubuntu | intel-microcode | 22.04 | 3.20210608.2ubuntu1 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20220510.0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20220809.0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20230214.0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20230808.0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20231114.0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20240514.0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20240813.0ubuntu0.22.04.2 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20240910.0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20241112.0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20250211.0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20250512.0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | intel-microcode | 22.04 | 3.20250812.0ubuntu0.22.04.1 | fixed |
| Ubuntu | intel-microcode | 24.04 | 3.20230808.1 | vulnerable |
| Ubuntu | intel-microcode | 24.04 | 3.20231114.0ubuntu1 | vulnerable |
| Ubuntu | intel-microcode | 24.04 | 3.20231114.1 | vulnerable |
| Ubuntu | intel-microcode | 24.04 | 3.20240312.1 | vulnerable |
| Ubuntu | intel-microcode | 24.04 | 3.20240312.1build1 | vulnerable |
| Ubuntu | intel-microcode | 24.04 | 3.20240514.0ubuntu0.24.04.1 | vulnerable |
| Ubuntu | intel-microcode | 24.04 | 3.20240813.0ubuntu0.24.04.2 | vulnerable |
| Ubuntu | intel-microcode | 24.04 | 3.20240910.0ubuntu0.24.04.1 | vulnerable |
| Ubuntu | intel-microcode | 24.04 | 3.20241112.0ubuntu0.24.04.1 | vulnerable |
| Ubuntu | intel-microcode | 24.04 | 3.20250211.0ubuntu0.24.04.1 | vulnerable |
| Ubuntu | intel-microcode | 24.04 | 3.20250512.0ubuntu0.24.04.1 | vulnerable |
| Ubuntu | intel-microcode | 24.04 | 3.20250812.0ubuntu0.24.04.1 | fixed |
| Ubuntu | intel-microcode | 25.10 | 3.20250211.1ubuntu1 | vulnerable |
| Ubuntu | intel-microcode | 25.10 | 3.20250512.1ubuntu1 | vulnerable |
| Ubuntu | intel-microcode | 25.10 | 3.20250812.0ubuntu0.25.10.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | intel-microcode | source | sid | 3.20250812.1 | not yet assigned | Not reported | [1110983] |
| Debian | intel-microcode | source | forky | 3.20250812.1 | not yet assigned | Not reported | [1110983] |
| Debian | intel-microcode | source | trixie | 3.20250812.1~deb13u1 | not yet assigned | Not reported | [1110983] |
| Debian | intel-microcode | source | bookworm | 3.20250812.1~deb12u1 | not yet assigned | Not reported | [1110983] |
| Ubuntu | intel-microcode | deb | noble | 3.20250812.1~deb12u1 | Not reported | Not reported | Not reported |
| Ubuntu | intel-microcode | deb | noble | 3.20250812.0ubuntu0.24.04.1 | Not reported | Not reported | Not reported |
| Alpine | intel-ucode | apk | 3.19 | 20250812-r0 | Not reported | ALPINE-CVE-2025-26403 | Not reported |
| Alpine | intel-ucode | apk | 3.20 | 20250812-r0 | Not reported | ALPINE-CVE-2025-26403 | Not reported |
| Alpine | intel-ucode | apk | 3.21 | 20250812-r0 | Not reported | ALPINE-CVE-2025-26403 | Not reported |
| Alpine | intel-ucode | apk | 3.22 | 20250812-r0 | Not reported | ALPINE-CVE-2025-26403 | Not reported |
| Alpine | intel-ucode | apk | 3.23 | 20250812-r0 | Not reported | ALPINE-CVE-2025-26403 | Not reported |
| Alpine | intel-ucode | apk | 3.24 | 20250812-r0 | Not reported | ALPINE-CVE-2025-26403 | Not reported |
| Ubuntu | intel-microcode | deb | pro | 3.20250812.0ubuntu0.20.04.1+esm1 | Not reported | UBUNTU-CVE-2025-26403 | Not reported |
| Ubuntu | intel-microcode | deb | 22.04 | 3.20250812.0ubuntu0.22.04.1 | Not reported | UBUNTU-CVE-2025-26403 | Not reported |
| Ubuntu | intel-microcode | deb | 24.04 | 3.20250812.0ubuntu0.24.04.1 | Not reported | UBUNTU-CVE-2025-26403 | Not reported |
| Ubuntu | intel-microcode | deb | 25.10 | 3.20250812.0ubuntu0.25.10.1 | Not reported | UBUNTU-CVE-2025-26403 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [intel-microcode]Fixed
Details (1)
3.20251111.1~deb12u1· amd64 · bookwormFixed · Fixed:
3.20250812.1~deb12u1usn · intel-microcode · debian · bookworm; usn · intel-microcode · debian · 12
[Debian 13 (Trixie)]
- [intel-microcode]Fixed
Details (1)
3.20251111.1~deb13u1· amd64 · trixieFixed · Fixed:
3.20250812.1~deb13u1usn · intel-microcode · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2025_03052-1.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2025-26403]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-26403]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2025-26403]
- [https://security-tracker.debian.org/tracker/CVE-2025-26403]
- [https://ubuntu.com/security/notices/USN-7866-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-1785.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]