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01 Record

CVE-2021-25490

A keyblob downgrade attack in keymaster prior to SMR Oct-2021 Release 1 allows attacker to trigger IV reuse vulnerability with privileged process.

MediumPUBLISHEDCNA: Samsung Mobile
CNA base score6.0 CVSS v3.xCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L
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02 Description

A keyblob downgrade attack in keymaster prior to SMR Oct-2021 Release 1 allows attacker to trigger IV reuse vulnerability with privileged process.

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.75% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 54.5% of scored records. A rank, not a probability.
NVD base score
6.0 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-10-06 17:10Z5 YR AGO
Last updated
2024-08-03 20:03Z2 YR AGO
Reserved
2021-01-19
Assigning CNA
Samsung Mobile
Record state
PUBLISHED
Severity
Medium (CVSS 6.0)
CNA CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L
Weaknesses
  • CWE-287Improper AuthenticationClass
Data version
5.1
Document digest
68b41e48ac3f524bad9a8f380d6a363e062351810c8c4356cebb2730acc8fd49

05 Affected products

VendorProductVersionsPlatforms
Samsung MobileSamsung Mobile DevicesP(9.0), Q(10.0), R(11.0) to < SMR Oct-2021 Release 1—

06 References