Skip to content
Fencer Vulns
medium 5.3

CVE-2026-20901 json

Improper input validation for some Intel(R) Xeon(R) processors within firmware may allow an escalation of privilege.

published 2026-08-11 2 mo ago modified 2026-08-28 2 mo ago also EUVD-2026-56788

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits
0
none known

Summary

Improper input validation for some Intel(R) Xeon(R) processors within firmware may allow an escalation of privilege. Startup code and smm adversary with a privileged user combined with a high complexity attack may enable data alteration. 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 (none), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (high) and availability (none) impacts.

Patch / fix

  • intel-microcode Debian 14 3.20260925.1

debian advisories DEBIAN-CVE-2026-20901

  • 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

opensuse advisories openSUSE-SU-2026:21736-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.10% chance of exploitation in the next 30 days, higher than 0% 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:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N
CNA 4.0 4.0 CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/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
NVD 3.1 5.3 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N

Affected products

  • n/a Intel(R) Xeon(R) processors

Classification

Weakness
  • CWE-20 Improper Input Validation

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.