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CVE-2021-25487: Samsung Mobile Devices Out-of-Bounds Read Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2023-06-29
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-06 · updated 2026-06-17
• Weakness: CWE-125

Description

Lack of boundary checking of a buffer in set_skb_priv() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read and it results in arbitrary code execution by dereference of invalid function pointer.

Affected products

• Samsung Android: 8.1, 9.0-smr-apr-2021-r1, 9.0-smr-aug-2021-r1, 9.0-smr-feb-2021-r1, 9.0-smr-jan-2021-r1, 9.0-smr-jul-2021-r1 (+22)

References

• https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10
• https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25487

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