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Vulnerability · Published May 12, 2026 · Assigned by intel

CVE-2025-35979

Medium 6.8

In plain English

A medium-severity security flaw in Intel(R) Processors. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.8Medium
Exploit odds (30 days)<0.1%top 99.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20intel-ucode20260512-r0ALPINE-CVE-2025-35979
Alpine:v3.21intel-ucode20260512-r0ALPINE-CVE-2025-35979
Alpine:v3.22intel-ucode20260512-r0ALPINE-CVE-2025-35979
Alpine:v3.23intel-ucode20260512-r0ALPINE-CVE-2025-35979
Alpine:v3.24intel-ucode20260512-r0ALPINE-CVE-2025-35979
Debian:12intel-microcodeno fix listedDEBIAN-CVE-2025-35979
Debian:13intel-microcodeno fix listedDEBIAN-CVE-2025-35979
Debian:14intel-microcode3.20260925.1DEBIAN-CVE-2025-35979
Ubuntu:22.04:LTSintel-microcodeno fix listedUBUNTU-CVE-2025-35979
Ubuntu:24.04:LTSintel-microcodeno fix listedUBUNTU-CVE-2025-35979
Ubuntu:25.10intel-microcodeno fix listedUBUNTU-CVE-2025-35979
Ubuntu:26.04:LTSintel-microcodeno fix listedUBUNTU-CVE-2025-35979
Ubuntu:26.10intel-microcodeno fix listedUBUNTU-CVE-2025-35979

Affected products (as reported)

VendorProductVersions
n/a Intel(R) Processors See references

Weakness: CWE-1423 · Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

References