CVE-2018-21058

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-04-08 · updated 2026-06-17
Weakness: CWE-327

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 products

Android: 7.0, 8.0

References

https://security.samsungmobile.com/securityUpdate.smsb
https://security.samsungmobile.com/securityUpdate.smsb

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