CVE-2026-119738

MediumCVSS 5.3

Published: 02/11/2026(UTC)Translated: 02/11/2026(UTC)NVD NIST

Summary

The VobSub subtitle decoder libsub_vob (part of the Amlogic DroidLogic SubTitleService) on Nexbox A95X TV boxes contains an infinite loop vulnerability in get_vob_spu(). An unauthenticated network attacker or local user loading malicious files can trigger an unreachable loop exit condition via mismatched length fields. This can be exploited by sending crafted AMLU data blocks over the unauthenticated tcp/10100 listener or via a malicious VobSub (.sub) file, causing the subtitle decode thread to spin at 100% CPU indefinitely, resulting in denial of service.

Risk Assessment

Could lead to denial of service by exhausting CPU resources, disrupting device operation.

Recommendation

Update the device firmware to a patched version, restrict access to tcp/10100, and avoid opening untrusted .sub files.

Other vulnerabilities in Amlogic DroidLogic SubTitleService libsub_vob

CVE-2026-119739Medium
The VobSub subtitle decoder libsub_vob (part of the Amlogic DroidLogic SubTitleService) on Nexbox A95X TV boxes contains an out-of-bounds write vulnerability in vob_fill_pixel(). A remote attacker can corrupt stack memory by sending a crafted SET_CONTR command with an attacker-controlled alpha value that drives an unbounded array index (change_data) past the end of the fixed four-element PixelDatas array. This can be exploited by sending malicious VobSub data over the unauthenticated tcp/10100 socket or via a malicious .sub file, resulting in silent stack corruption or process crash.

Original NVD description (English source)

The VobSub subtitle decoder libsub_vob (part of the Amlogic DroidLogic SubTitleService), as shipped on Nexbox A95X (Amlogic S905X) TV boxes, contains an infinite loop vulnerability in get_vob_spu() that allows unauthenticated network attackers or local users loading malicious files to trigger an unreachable loop exit condition via mismatched length fields. Attackers can send crafted AMLU data blocks over the unauthenticated tcp/10100 listener or via a malicious VobSub (.sub) file to cause the subtitle decode thread to spin at 100% CPU indefinitely, resulting in denial of service.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS