CVE-2026-119738
CVE-2026-119738
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.
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- mstreet97.github.io/security-research/vulnerability-disclosure/embedded/cve/202… (technical-description, exploit)
- www.vulncheck.com/advisories/amlogic-droidlogic-subtitleservice-infinite-loop-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119738?
- CVE-2026-119738 is a medium-severity vulnerability, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.3/10. Published 2026-11-02.
- How severe is CVE-2026-119738?
- Medium severity. CVSS v3 base score is 5.3 out of 10.