CVEs / CVE-2025-21043
CVE-2025-21043: Samsung Mobile Devices Out-of-Bounds Write Vulnerability
- Known exploited in the CISA KEV catalog since 2 Oct 2025
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 2.21% chance of exploitation in the next 30 days, higher than 82% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Samsung mobile devices contain an out-of-bounds write vulnerability in libimagecodec.quram.so which allows remote attackers to execute arbitrary code.
Description
Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| samsung android | 13.0 | — |
| samsung android | 14.0 | — |
| samsung android | 15.0 | — |
| samsung android | 16.0 | — |
Exploitation
| In CISA KEV since | 2 Oct 2025 |
|---|---|
| Due date for US federal agencies | 23 Oct 2025 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-787 |
References
- CVE-2025-21043 on NVD
- CVE-2025-21043 in the CISA KEV catalog
- https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=09 (cited by CISA)
- https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=09 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21043 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.