Buffer overflow in Samsung Android
CVE-2025-21043
Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.021 (81.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.021 · change: +0.002
Affected products
- Samsung Android — versions 13.0, 14.0, 15.0
- Samsung Mobile Devices — versions SMR Sep-2025 Release in Android 13, 14, 15, 16
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
References
- security.samsungmobile.com/securityUpdate.smsb (Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2025-21043?
- CVE-2025-21043 is a high-severity vulnerability in Samsung Android, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2025-09-12.
- How severe is CVE-2025-21043?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-21043 known to be exploited?
- Yes. CVE-2025-21043 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-10-02), indicating it is being actively exploited. 8 public proof-of-concept repositories are indexed.