| Name | CVE-2025-35979 |
| Description | Exposure of sensitive information caused by shared microarchitectural predictor state that influences transient execution for some Intel(R) Processors within VMX non-root (guest) operation may allow an information disclosure. Unprivileged software adversary with an authenticated user combined with a high complexity attack may enable data exposure. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (none) and availability (none) impacts. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1137032 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| intel-microcode (PTS) | bullseye/non-free | 3.20240813.1~deb11u1 | vulnerable |
| bullseye/non-free (security) | 3.20250812.1~deb11u1 | vulnerable |
| bookworm/non-free-firmware | 3.20251111.1~deb12u1 | vulnerable |
| bookworm/non-free-firmware (security) | 3.20250812.1~deb12u1 | vulnerable |
| trixie/non-free-firmware | 3.20251111.1~deb13u1 | vulnerable |
| trixie/non-free-firmware (security) | 3.20250812.1~deb13u1 | vulnerable |
| sid/non-free-firmware, forky/non-free-firmware | 3.20260227.1 | vulnerable |
The information below is based on the following data on fixed versions.
Notes
[trixie] - intel-microcode <postponed> (As usual fixed top-down, expose first in unstable, then likely point release)
[bookworm] - intel-microcode <postponed> (As usual fixed top-down, expose first in unstable, then likely point release)
[bullseye] - intel-microcode <postponed> (Wait for stable update)
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01420.html
https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/releases/tag/microcode-20260512