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CVE-2018-21058

CRITICAL
9.8
CVSS Score
Published: April 8, 2020 at 05:43 PM UTC
Updated: June 17, 2026 at 01:54 AM UTC
1 product affected across 1 vendorAndroid· also runs on 3 platforms

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Severity
CRITICAL9.8
Exploit prediction
EPSS 0.3%

Description

An issue was discovered on Samsung mobile devices with N(7.0), O(8.0) (exynos7420 or Exynos 8890/8996 chipsets) software. Cache attacks can occur against the Keymaster AES-GCM implementation because T-Tables are used; the Cryptography Extension (CE) is not used. The Samsung ID is SVE-2018-12761 (September 2018).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Android· Google
95%
7.08.0
samsung-exynos-7420 (environment) · samsung-exynos-8890 (environment) · samsung-exynos-8996 (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://security.samsungmobile.com/securityUpdate.smsb

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-327

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