# Samsung Mobile Devices: Mobile Devices Out-of-Bounds Write Vulnerability · pwn.watch

> Samsung mobile devices contain an out-of-bounds write vulnerability in libimagecodec.quram.so which allows remote attackers to execute arbitrary code. Added to CISA KEV on 2025-10-02.

Page: https://pwn.watch/i/samsung-mobile-devices-cve-2025-21043 · generated 2026-10-22T23:13:41.393Z

## Status
- Severity: high · status: closed · patch: patched
- Product: Samsung Mobile Devices
- Started: 2025-10-02 · closed: 2025-10-02
- CVEs: CVE-2025-21043
- Affected: See vendor advisory / CISA notes (versions not always listed in KEV feed)
- Fixed in: See vendor advisory linked in sources

## Follow this incident
- RSS (one item per update): https://pwn.watch/i/samsung-mobile-devices-cve-2025-21043/feed.xml
- JSON Feed: https://pwn.watch/i/samsung-mobile-devices-cve-2025-21043/feed.json
- Full data (timeline, sources, posts, agentBrief): https://pwn.watch/i/samsung-mobile-devices-cve-2025-21043.json
- This file: https://pwn.watch/i/samsung-mobile-devices-cve-2025-21043/llms.txt

## Updates (newest first)
- 2025-10-02: CISA added CVE-2025-21043 to the KEV catalog (due 2025-10-23).

## Fix brief
# Security brief: Samsung Mobile Devices: Mobile Devices Out-of-Bounds Write Vulnerability

Source: https://pwn.watch/i/samsung-mobile-devices-cve-2025-21043 · status: closed (closed Oct 2, 2025) · severity: high · updated Oct 2, 2025

## Patch status
**PATCHED: fixed releases exist. Upgrade to a fixed version.**

## What it is
Samsung mobile devices contain an out-of-bounds write vulnerability in libimagecodec.quram.so which allows remote attackers to execute arbitrary code. Added to CISA KEV on 2025-10-02.

Severity detail: CVSS 8.8 (CNA, v3.1); actively exploited (CISA KEV)

- Product: Samsung Mobile Devices
- CVE / advisory ids: CVE-2025-21043

## Affected versions
- See vendor advisory / CISA notes (versions not always listed in KEV feed)

## Check whether you're affected
No generic command applies (the product is a hosted service, appliance or desktop app). Check the installed version in its admin UI / About screen and compare with the versions above.

## Fix
Upgrade to one of these fixed versions (or later on the same branch):
- See vendor advisory linked in sources

After upgrading, re-run the checks above and redeploy/restart the affected services.

## Latest updates
- Oct 2, 2025: CISA added CVE-2025-21043 to the KEV catalog (due 2025-10-23).

## Advisories
- [Samsung advisory: Samsung Mobile Devices](https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=09) (Samsung)
- [NVD: CVE-2025-21043](https://nvd.nist.gov/vuln/detail/CVE-2025-21043) (NVD)
- [CISA Known Exploited Vulnerabilities Catalog](https://www.cisa.gov/known-exploited-vulnerabilities-catalog) (CISA)

## Caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025).

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Machine-readable: https://pwn.watch/i/samsung-mobile-devices-cve-2025-21043.json · all incidents: https://pwn.watch/incidents.json. Verify against the vendor advisory before changing production systems.