CVE-2026-29508
Description
A flaw was found in minidlna. This vulnerability allows a remote attacker to achieve arbitrary code execution or cause a Denial of Service (DoS) by placing a specially crafted DFF audio file into a directory monitored by the service. When processing the file, the application fails to validate an oversized chunk size, leading to a stack-based buffer overflow and memory corruption.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
--- CME Mitigation Guidance (2026-11-04) ---
Disclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure.
The highest-value action is to eliminate unbounded variable-length array allocation and enforce bounds validation on PROP chunk sizes within the ReadyMedia DFF audio parser: upgrade to the fixed Minidlna builds, which no patch behavior is documented in available vendor advisories; the vulnerability involves an unvalidated DFF PROP chunk size used to size stack allocations, closing all 3 injection vectors (crafted DFF audio file in monitored directory, SMB file upload, AiCloud file upload). Until patched, this is only a concern on Linux systems running ReadyMedia (MiniDLNA) versions 1.3.0 through 1.3.3 with inotify directory monitoring enabled — Non-Linux platforms are unaffected — so Restrict file upload and write permissions across monitored media directories to prevent untrusted users from placing files locally or through SMB and AiCloud shares. As a compensating measure, Enable ASLR to randomize memory mappings and hinder reliable execution of hijacked stack pointers, Enforce Full RELRO and PIE to make relocations read-only and prevent Global Offset Table overwrites, Implement Control Flow Integrity and Shadow Call Stack to validate return addresses and block ROP chains, Operate SELinux in enforcing mode to confine the MiniDLNA process domain and restrict unauthorized system access, Isolate the ReadyMedia service inside User, PID, Network, and Mount Linux namespaces to constrain system access, and Deploy an EDR agent to monitor and flag anomalous process execution, interactive shells, or payload drops. These controls limit blast radius and contain exploitation, but they do not fix the underlying stack-based buffer overflow defect — apply the upstream patch to fully remediate.
Highest-impact CME: CME-301 SELinux (Enforcing Mode) (medium)
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce undefined or unexpected results.
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