Patchfirst
CVE-2025-21043 KEV Critical · 9.8 EPSS 2.2%

Samsung Mobile Devices Out-of-Bounds Write Vulnerability

Samsung · Mobile Devices

Summary

An out-of-bounds write in the libimagecodec.quram.so image codec library of Samsung Mobile Devices allows memory corruption flaws to be triggered during image processing. A remote attacker with no privileges and no user interaction can exploit it to execute arbitrary code.

Official description · NVD

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

Breakdown
61.4 / 100
Exploited
Yes, in CISA KEV
Reports
0
Tactics
0/15

First seen exploited the day it was disclosed.

  1. DisclosedFirst seen exploitedVulnCheck KEV evidenceday 0
  2. Added to CISA KEVEU database agrees+20 days

CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.

techniques

No techniques linked

No high- or medium-confidence techniques. The 2 available links are lower confidence and listed below.

Lower-confidence links (2)

These come from early or generic mappings, text matching, or contradict this CVE’s details (for example a public-facing technique on a bug that needs a user to open a file). Shown for completeness.

  • Drive-by CompromiseT1189 server-side bug exploitable without user interaction; client-execution technique does not fit
  • Exploitation for Client ExecutionT1203 server-side bug exploitable without user interaction; client-execution technique does not fit

What security researchers reported

Not named in any threat report yet

Also mentioned in 50 community threat pulses (AlienVault OTX)

Weaker evidence

Pulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.

References

2 links, grouped by NVD tag
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