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Fencer Vulns
high 7.2

CVE-2024-21820 json

Incorrect default permissions in some Intel(R) Xeon(R) processor memory controller configurations when using Intel(R) SGX may allow a privi…

published 2024-11-13 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-19432

cvss
7.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

Incorrect default permissions in some Intel(R) Xeon(R) processor memory controller configurations when using Intel(R) SGX may allow a privileged user to potentially enable escalation of privilege via local access.

Patch / fix

  • intel-microcode Debian 12 3.20241112.1~deb12u1
  • intel-microcode Debian 14, Debian 13 3.20241112.1

debian advisories DEBIAN-CVE-2024-21820

  • intel-microcode Ubuntu 20.04 LTS 3.20241112.0ubuntu0.20.04.1
  • intel-microcode Ubuntu 22.04 LTS 3.20241112.0ubuntu0.22.04.1
  • intel-microcode Ubuntu 24.04 LTS 3.20241112.0ubuntu0.24.04.1
  • intel-microcode Ubuntu Pro 16.04 LTS 3.20241112.0ubuntu0.16.04.1+esm1
  • intel-microcode Ubuntu Pro 18.04 LTS 3.20241112.0ubuntu0.18.04.1+esm1

ubuntu advisories UBUNTU-CVE-2024-21820

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • ucode-intel Linux Micro 6.1 20250211-slfo.1.1_2.1
  • ucode-intel Linux Micro 6.0 20241112-1.1
  • ucode-intel SLES for SAP 15 SP4, SLES for SAP 15 SP3, SLES for SAP 15 SP2 +20 more 20241112-150200.50.1
  • microcode_ctl SLES 11 SP4 LTSS EXTREME CORE 1.17-102.83.81.1
  • ucode-intel SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 20241112-146.1

suse advisories SUSE-SU-2025:20286-1SUSE-SU-2025:1032-1SUSE-SU-2025:20092-1SUSE-SU-2024:4053-1SUSE-SU-2024:3995-1

  • ucode-intel openSUSE Tumbleweed 20241112-1.1

opensuse advisories openSUSE-SU-2024:14496-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
23 mo ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.5 CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
CNA 3.1 7.2 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
CNA 4.0 8.5 CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/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

Affected products

  • n/a Intel(R) Xeon(R) processor memory controller configurations when using Intel(R) SGX
  • intel 3rd_generation_intel_xeon_scalable_processor_family
  • intel 4th_generation_intel_xeon_processor_scalable_family
  • intel 5th_generation_intel_xeon_processor_scalable_family
  • intel xeon_d_processor

Classification

Weakness
  • CWE-276 Incorrect Default Permissions

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.