CVE-2021-33120: intel atom_p5921b_firmware Out-of-bounds Read
CVSS: 5.5v2.0MediumModified
AliasesUBUNTU-CVE-2021-33120DEBIAN-CVE-2021-33120
Published 09-02-2022Last modified 05-05-2025
Vulnerability summary
CVE-2021-33120 is a medium (CVSS 5.5) Out-of-bounds Read vulnerability in intel atom_p5921b_firmware. EPSS estimates a 0.95% chance of exploitation in the next 30 days, higher than 60.6% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v2.0 (NVD)EPSS score
0.95%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 10 · Related 9Timeline
- 09-02-2022PublishedVulnerability first disclosed.
- 05-05-2025Last modifiedVulnerability information updated.
Description
Out of bounds read under complex microarchitectural condition in memory subsystem for some Intel Atom(R) Processors may allow authenticated user to potentially enable information disclosure or cause denial of service via network access.
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 5.4Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:LSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
- OSV · DebianEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
- NVDNIST5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
Medium 5.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:P/I:N/A:PSourcesSingle source
EPSS trend
Probability
0.95%
Chance of exploitation in the next 30 days
Percentile
61%
Versus all other CVEs
30-day change
0.00 pp
From 0.95% on 19-09-2026
19-09-202619-10-2026
EPSS score0.95%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Intel25 products
- atom_p5921b_firmwarena
- atom_p5931b_firmwarena
- atom_p5942b_firmwarena
- atom_p5962b_firmwarena
- atom_x6200fe_firmwarena
Debian1 product
- intel-microcode< 3.20220207.1
Ubuntu1 product
- intel-microcodeAll versions (No fix recorded) | < 3.20220510.0ubuntu0.16.04.1+esm1 | < 3.20220510.0ubuntu0.18.04.1 | < 3.20220510.0ubuntu0.20.04.1 | < 3.20220510.0ubuntu0.22.04.1
3 vendors · 27 products
References
6 links- www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00589.htmlX Refsource MISCREPORTMitigationVendor Advisory
