In vdec, there is a possible out of bounds write due to a missing bounds check.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
In vdec, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: ALPS11383899; Issue ID: MSV-9614.
Timeline
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- CVE published
- Record last updated
Affected versions
- MediaTek, Inc. MediaTek chipset
MT6768, MT6769, MT6789, MT6833, MT6855, MT6877, MT8771, MT8781, MT8781X, MT8786, MT8791T
References 1
mediatek.com
Questions about CVE-2026-20586
What does this mean?
The vdec video decoder can write data past the end of a memory buffer because a bounds check is missing. This corrupts memory. The advisory does not say what an attacker could gain from it.Source: mediatek.com
Am I affected, and how do I check?
The advisory lists MediaTek chipsets MT2718, MT6768, MT6769, MT6789, MT6833, MT6855, MT6877, MT8186, MT8188, MT8189, MT8195, MT8196, MT8367, MT8391, MT8395, MT8696, MT8781, MT8788E, MT8792, MT8793, MT8799 and MT8910. To check a device, look up its chipset model in the device specifications or the vendor's build information.Source: mediatek.com
What should I do about it?
The facts do not name a fixed software version or a patched build, so no upgrade target is confirmed. Check the device vendor's security bulletins for a patch that covers this CVE.Source: mediatek.com
Is it being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What if there's no patch?
No fix is listed in the checked facts, so no official patch can be confirmed. The advisory does not give a workaround, so the facts do not describe one.Source: mediatek.com