CVE-2025-21042 — Samsung Mobile Devices Out-of-Bounds Write Vulnerability

Out-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.

01What is this vulnerability?

Out-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.

02Affected products

Vendor	Product	Versions
Samsung Mobile	Samsung Mobile Devices	SMR Apr-2025 Release in Android 13, 14, 15

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2025-11-10. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2025-09-12T07:21:49.997Z
• Last modified: 2026-02-26T17:48:40.023Z
• Added to CISA KEV: 2025-11-10
• BOD 22-01 due: 2025-12-01

09References

• security.samsungmobile.com — https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=04