CVE-2021-25473
Description
Assuming a shell privilege is gained, an improper exception handling for multi_sim_bar_hide_by_meadia_full value in SystemUI prior to SMR Oct-2021 Release 1 allows an attacker to cause a permanent denial of service in user device before factory reset.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Improper exception handling for multi_sim_bar_hide_by_meadia_full in Samsung SystemUI allows an attacker with shell access to cause permanent DoS until factory reset.
Vulnerability
An improper exception handling vulnerability exists in the multi_sim_bar_hide_by_meadia_full value handling within SystemUI on Samsung mobile devices. This issue affects devices running firmware versions prior to the SMR Oct-2021 Release 1. The vulnerable code path is reachable when an attacker has already gained a shell privilege on the device.
Exploitation
An attacker who has already obtained shell privileges on the device can exploit this vulnerability by manipulating the multi_sim_bar_hide_by_meadia_full value in SystemUI. The improper exception handling causes a crash or unrecoverable state, leading to a permanent denial of service. No additional user interaction is required beyond the initial privilege escalation.
Impact
Successful exploitation results in a permanent denial of service (DoS) of the user's device, rendering it unusable until a factory reset is performed. This impacts availability severely, as the device becomes completely inoperable and all user data may be lost due to the required reset.
Mitigation
Samsung has addressed this vulnerability in the SMR Oct-2021 Release 1 security update, as disclosed in the Samsung Mobile Security bulletin [1]. Users should apply the latest firmware update for their device to remediate the issue. There is no known workaround; a factory reset may restore functionality but will not patch the underlying vulnerability.
AI Insight generated on May 27, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2- Range: < SMR Oct-2021 Release 1
- Range: R(11.0)
Patches
0No patches discovered yet.
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
1- security.samsungmobile.com/securityUpdate.smsbmitrex_refsource_MISC
News mentions
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