What’s Vulnerable › Vulnerabilities

CVE-2012-6422

• Severity: critical (CVSS 9.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 15.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2012-12-18 · updated 2026-06-16
• Weakness: CWE-264

Description

The kernel in Samsung Galaxy S2, Galaxy Note 2, MEIZU MX, and possibly other Android devices, when running an Exynos 4210 or 4412 processor, uses weak permissions (0666) for /dev/exynos-mem, which allows attackers to read or write arbitrary physical memory and gain privileges via a crafted application, as demonstrated by ExynosAbuse.

Affected products

• Meizu Mx: all versions
• Samsung Galaxy Note 2: all versions
• Samsung Galaxy S2: all versions

References

• http://arstechnica.com/security/2012/12/developer-warns-of-critical-vulnerability-in-many-samsung-smartphones/
• http://forum.xda-developers.com/showthread.php?p=35469999
• http://forum.xda-developers.com/showthread.php?t=2051290
• http://osvdb.org/88467
• http://project-voodoo.org/articles/instant-fix-app-for-exynos-mem-abuse-vulnerability-no-root-required-reversible
• http://www.sammobile.com/2012/12/16/major-vulnerability-found-on-exynos-4-devices/
• http://www.securityweek.com/new-vulnerability-exposed-samsungs-android-devices
• http://arstechnica.com/security/2012/12/developer-warns-of-critical-vulnerability-in-many-samsung-smartphones/
• http://forum.xda-developers.com/showthread.php?p=35469999
• http://forum.xda-developers.com/showthread.php?t=2051290
• http://osvdb.org/88467
• http://project-voodoo.org/articles/instant-fix-app-for-exynos-mem-abuse-vulnerability-no-root-required-reversible

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