CVE-2026-119739

MEDIUM 5.3

Amlogic DroidLogic SubTitleService Out-of-Bounds Write via VobSub SET_CONTR

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

The VobSub subtitle decoder libsub_vob (part of the Amlogic DroidLogic SubTitleService), as shipped on Nexbox A95X (Amlogic S905X) TV boxes, contains an out-of-bounds write vulnerability in vob_fill_pixel() that allows remote attackers to 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. Attackers can exploit this by sending malicious VobSub data over the unauthenticated tcp/10100 socket or via a malicious .sub file to zero out adjacent stack bytes, resulting in silent stack corruption or process crash.

CWE	CWE-787
Vendor	nexbox
Product	a95x
Published	Nov 2, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

Nexbox / A95X

NEXBOX-A95X-AP6330

Amlogic / Amlogic Android SDK

References

NVD ↗ CVE.org ↗ EPSS Data ↗

mstreet97.github.io: https://mstreet97.github.io/security-research/vulnerability-disclosure/embedded/cve/2026/10/29/From-UART-to-root-android-version.html vulncheck.com: https://www.vulncheck.com/advisories/amlogic-droidlogic-subtitleservice-out-of-bounds-write-via-vobsub-set-contr

Credits

Matteo Strada (mstreet)