EUVD-2026-42827
GHSA-f2f7-m9f4-p7f9
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local vector and high privilege confirmed by description; memory corruption yields high integrity and availability impact with only limited confidentiality exposure.
Primary rating from Vendor (samsung).
CVSS VectorVendor: samsung
Lifecycle Timeline
1DescriptionCVE.org
Improper input validation in Samsung Pass prior to version 5.2.10.3 allows local privileged attackers to write out-of-bounds memory.
AnalysisAI
Out-of-bounds memory write in Samsung Pass prior to version 5.2.10.3 enables local privileged attackers to corrupt process memory, producing high integrity and availability impact with limited confidentiality exposure. The root cause is improper input validation - a buffer overflow class defect - confirmed by Samsung's mobile security team and catalogued under EUVD-2026-42827. No public exploit code or CISA KEV listing has been identified; Samsung has released version 5.2.10.3 as the remediation.
Technical ContextAI
Samsung Pass is the native credential management and autofill application bundled on Samsung Galaxy and other Samsung Android devices, tightly integrated with the Samsung Knox security framework. The vulnerability arises from insufficient validation of attacker-controlled input fed into an internal routine, allowing a write operation to exceed the bounds of an allocated memory buffer - a pattern consistent with CWE-787 (Out-of-Bounds Write) or CWE-120 (Buffer Copy Without Checking Size of Input), although NVD has not formally assigned a CWE identifier. The 'Buffer Overflow' tag supplied by the reporter (mobile.security@samsung.com) corroborates this root-cause class. The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:H/UI:N) indicates the vulnerable code path is reachable only from a local, high-privilege context with no additional attack preconditions, meaning the attacker must already exercise elevated control over the device to supply the malformed input.
RemediationAI
Update Samsung Pass to version 5.2.10.3 or later, as confirmed by EUVD-2026-42827 and the Samsung Mobile Security bulletin at https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=07. On Samsung devices, this update is typically delivered through the Galaxy Store or via Samsung's device Software Update mechanism (Settings > Software update). For enterprise environments managing Samsung devices via MDM (e.g., Samsung Knox Manage or equivalent), administrators should enforce the update through policy and audit installed Samsung Pass versions. As a compensating control where immediate patching is not feasible, restrict the set of applications and accounts granted device administrator or root-equivalent privileges, since PR:H is the critical prerequisite for exploitation - note this does not remediate the underlying vulnerability and reduces only the attacker pool, not the attack path itself.
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External POC / Exploit Code
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