Samsung Mobile Devices Out-of-Bounds Write Vulnerability (CVE-2025-21043)
Severity: critical · Patch status: unknown · Since 2025-10-02 · CVE-2025-21043
Samsung mobile devices contain an out-of-bounds write vulnerability in libimagecodec.quram.so which allows remote attackers to execute arbitrary code. CISA added CVE-2025-21043 to its Known Exploited Vulnerabilities catalog on Oct 2, 2025, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Oct 23, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
