CVE-2026-21065 in Samsung
Summary
by MITRE • 08/10/2026
Out-of-bounds write in libcodec2secqcelpdec.so prior to SMR Aug-2026 Release 1 allows local attackers to write out-of-bounds memory.
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Analysis
by VulDB Data Team • 08/10/2026
This vulnerability represents a critical out-of-bounds write flaw located within the libcodec2secqcelpdec.so library component, which is part of a broader software ecosystem that has not yet received security updates through the SMR August 2026 release cycle. The issue manifests as an insufficient bounds checking mechanism that permits local attackers to manipulate memory locations beyond the intended buffer boundaries, creating potential opportunities for arbitrary code execution or system instability.
The technical nature of this vulnerability aligns with CWE-787, which specifically addresses out-of-bounds writes in software systems where input validation fails to properly restrict data access within allocated memory regions. This type of flaw typically occurs when developers fail to validate input parameters against buffer size constraints, allowing malicious actors to overwrite adjacent memory locations. The local privilege requirement suggests that attackers must already have system-level access or execution capabilities within the target environment before exploiting this vulnerability, though the potential impact remains significant given the nature of memory corruption vulnerabilities.
The operational impact of this vulnerability extends beyond simple memory corruption, as it can potentially enable attackers to manipulate critical system processes, escalate privileges, or inject malicious code into running applications. Within the context of the ATT&CK framework, this vulnerability could be leveraged during the privilege escalation phase or through process injection techniques where an attacker seeks to modify program behavior by overwriting memory structures. The specific reference to the SMR August 2026 release cycle indicates that this is a known issue that has been documented in the vendor's security advisory process but remains unpatched in current deployments.
Security practitioners should prioritize identifying systems running affected versions of libcodec2secqcelpdec.so and implementing immediate mitigations while preparing for the upcoming security patch release. The vulnerability's classification as local attack surface means that traditional network-based protections may not be sufficient, though organizations should maintain comprehensive monitoring for unusual memory access patterns or process behavior that might indicate exploitation attempts. Additional protective measures include implementing application sandboxing, restricting user privileges, and conducting thorough code reviews to identify similar bounds checking issues within other library components that might present analogous vulnerabilities.