CVE catalog
CVE-2025-35973
Improper handling of values for some Intel(R) Processors within Ring 0: Kernel, Hypervisor and Bare Metal OS may allow an escalation of privilege. Authorized adversary with a privileged user combined
- 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
- 0.10% · Oct 25, 2026
Improper handling of values for some Intel(R) Processors within Ring 0: Kernel, Hypervisor and Bare Metal OS may allow an escalation of privilege. Authorized adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present with special internal knowledge and require no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (low) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (high) and availability (none) impacts.
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 | vulnerable |
| Debian | intel-microcode | forky | 3.20260227.1 | vulnerable |
| Debian | intel-microcode | trixie | 3.20251111.1~deb13u1 | vulnerable |
| Debian | intel-microcode | trixie-security | 3.20250812.1~deb13u1 | vulnerable |
| Debian | intel-microcode | bookworm | 3.20251111.1~deb12u1 | vulnerable |
| Debian | intel-microcode | bookworm-security | 3.20250812.1~deb12u1 | vulnerable |
| Alpine | intel-ucode | 3.21 | 20260812-r0 | fixed |
| Alpine | intel-ucode | 3.22 | 20260812-r0 | fixed |
| Alpine | intel-ucode | 3.23 | 20260812-r0 | fixed |
| Alpine | intel-ucode | 3.24 | 20260812-r0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | intel-microcode | source | sid | (unfixed) | not yet assigned | Not reported | [1144158] |
| Debian | intel-microcode | source | forky | (unfixed) | not yet assigned | Not reported | [1144158] |
| Debian | intel-microcode | source | trixie | (unfixed) | not yet assigned | Not reported | [1144158] |
| Debian | intel-microcode | source | bookworm | (unfixed) | not yet assigned | Not reported | [1144158] |
| Alpine | intel-ucode | apk | 3.21 | 20260812-r0 | Not reported | ALPINE-CVE-2025-35973 | Not reported |
| Alpine | intel-ucode | apk | 3.22 | 20260812-r0 | Not reported | ALPINE-CVE-2025-35973 | Not reported |
| Alpine | intel-ucode | apk | 3.23 | 20260812-r0 | Not reported | ALPINE-CVE-2025-35973 | Not reported |
| Alpine | intel-ucode | apk | 3.24 | 20260812-r0 | Not reported | ALPINE-CVE-2025-35973 | Not reported |
Notes
[trixie] intel-microcode: As usual fixed top-down, expose first in unstable, then likely point release [bookworm] intel-microcode: As usual fixed top-down, expose first in unstable, then likely point release
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [intel-microcode]Affected
Details (1)
3.20251111.1~deb12u1· amd64 · bookwormAffected
nvd · intel-microcode · debian · bookworm; nvd · intel-microcode · debian · 12
[Debian 13 (Trixie)]
- [intel-microcode]Affected
Details (1)
3.20251111.1~deb13u1· amd64 · trixieAffected
nvd · intel-microcode · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11599-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2025-35973]
- [https://osv.dev/vulnerability/ALPINE-CVE-2025-35973]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-35973]
- [https://security-tracker.debian.org/tracker/CVE-2025-35973]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-35973.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]