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Fencer Vulns
medium 4.0

CVE-2026-20917 json

Exposure of sensitive information caused by incorrect data forwarding during transient execution for some Intel(R) Processors within Ring 0…

published 2026-08-11 2 mo ago modified 2026-08-12 2 mo ago also EUVD-2026-56822

cvss
4.0
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

Exposure of sensitive information caused by incorrect data forwarding during transient execution for some Intel(R) Processors within Ring 0: Hypervisor and Kernel may allow information disclosure. System software adversary with a privileged user combined with a high complexity attack may enable data exposure. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (none) and availability (none) impacts.

Patch / fix

  • intel-microcode Debian 14 3.20260925.1

debian advisories DEBIAN-CVE-2026-20917

  • ucode-intel SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 20260812-160000.1.1
  • ucode-intel SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +11 more 20260812-150200.68.1
  • ucode-intel Linux Micro 6.1 20260812-slfo.1.1_1.1
  • ucode-intel Linux Micro 6.0 20260812-1.1
  • microcode_ctl SLES 11 SP4 LTSS EXTREME CORE 1.17-102.83.98.1
  • ucode-intel SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 20260812-164.1

suse advisories SUSE-SU-2026:23459-1SUSE-SU-2026:23602-1SUSE-SU-2026:4025-1SUSE-SU-2026:4019-1SUSE-SU-2026:23539-1SUSE-SU-2026:23449-1

  • ucode-intel openSUSE Leap 16.0 20260812-160000.1.1
  • ucode-intel openSUSE Tumbleweed 20260812-1.1

opensuse advisories openSUSE-SU-2026:21736-1openSUSE-SU-2026:11599-1

  • intel-ucode Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 20260812-r0

alpine advisories ALPINE-CVE-2026-20917

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 4.0 CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
CNA 4.0 4.0 CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • n/a Intel(R) Processors

Classification

Weakness
  • CWE-1422 Exposure of Sensitive Information caused by Incorrect Data Forwarding during Transient Execution

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.