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Fencer Vulns
medium 4.7

CVE-2024-21853 json

Improper finite state machines (FSMs) in the hardware logic in some 4th and 5th Generation Intel(R) Xeon(R) Processors may allow an authori…

published 2024-11-13 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-19464

cvss
4.7
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 13%
public exploits
0
none known

Summary

Improper finite state machines (FSMs) in the hardware logic in some 4th and 5th Generation Intel(R) Xeon(R) Processors may allow an authorized user to potentially enable denial of service 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-2024-21853

  • 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-2024-21853

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

  • intel-ucode Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 20241112-r0

alpine advisories ALPINE-CVE-2024-21853

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

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-21853 updated cvss 4.7

kernel: microcode_ctl: From CVEorg collector

  • Red Hat Enterprise Linux 7 microcode_ctl Red Hat Enterprise Linux 8 microcode_ctl Red Hat Enterprise Linux 9 microcode_ctl Red Hat Enterprise Linux 10 microcode_ctl
    affected: no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
23 mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.7 CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 4.0 5.7 CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/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 4th and 5th Generation Intel(R) Xeon(R) Processors

Classification

Weakness
  • CWE-1245 Improper Finite State Machines (FSMs) in Hardware Logic

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.