CVE-2025-21053 in Samsung
Summary
by MITRE • 10/10/2025
Out-of-bounds write in the parsing header for JPEG decoding in libpadm.so prior to SMR Oct-2025 Release 1 allows local attackers to cause memory corruption.
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Analysis
by VulDB Data Team • 10/24/2025
The vulnerability identified as CVE-2025-21053 represents a critical out-of-bounds write condition within the JPEG decoding functionality of libpadm.so library. This issue specifically manifests during the parsing of JPEG headers, where the library fails to properly validate input data boundaries before writing to memory locations. The flaw affects systems utilizing the SMR Oct-2025 Release 1 and earlier versions of the affected software components, creating a persistent security risk for local attackers who can exploit this vulnerability to manipulate memory contents. The vulnerability falls under the CWE-787 Out-of-bounds Write category, which directly relates to improper bounds checking in memory operations. From an operational perspective, this vulnerability enables local attackers to potentially execute arbitrary code or cause system instability through carefully crafted malicious JPEG files that trigger the vulnerable code path during header parsing operations.
The technical implementation of this vulnerability stems from insufficient input validation within the JPEG header parsing routine of libpadm.so. When processing JPEG files, the library reads header information and attempts to write data to memory buffers without adequate bounds checking to ensure that the write operations remain within allocated memory boundaries. This allows an attacker to construct specially formatted JPEG headers that cause the parsing code to write beyond intended memory limits, resulting in memory corruption. The vulnerability is particularly concerning because it operates within a library that likely handles image processing tasks in various applications, making the attack surface broad and potentially affecting multiple software components that depend on libpadm.so for image handling functionality. The out-of-bounds write condition creates opportunities for attackers to overwrite adjacent memory locations, potentially corrupting program state or enabling code execution through memory corruption exploitation techniques.
From a security operations standpoint, this vulnerability presents significant risk to local attacker capabilities due to the nature of out-of-bounds memory corruption. Attackers can leverage this flaw to cause denial of service conditions by corrupting memory structures that lead to application crashes or system instability. The vulnerability also provides potential for privilege escalation scenarios where memory corruption could be manipulated to execute malicious code with the privileges of the affected process. The impact extends beyond immediate system stability concerns as this type of vulnerability can serve as a foundation for more sophisticated attacks when combined with other exploitation techniques. The local nature of the attack vector means that exploitation does not require network access, making it particularly dangerous in environments where local user access is possible. This vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter, as the memory corruption could enable attackers to execute code through manipulated memory structures.
The recommended mitigation strategy involves immediate deployment of the SMR Oct-2025 Release 1 patch or equivalent security updates that address the bounds checking deficiencies in the JPEG header parsing logic. Organizations should prioritize patch management processes to ensure all affected systems receive updates promptly, particularly in environments where local user access is possible or where the affected library is used in critical applications. Additionally, implementing input validation controls and sandboxing measures around JPEG processing functionality can provide additional defense-in-depth layers. System administrators should monitor for any signs of exploitation attempts and implement logging controls to detect potential abuse of this vulnerability. The vulnerability's classification as a memory corruption issue also necessitates regular system integrity checks and memory monitoring to detect any unauthorized modifications to program memory structures that could result from exploitation attempts.