Medium severity · published Aug 3, 2026
CVE-2026-20464
In hevc decoder, there is a possible out of bounds write due to an integer overflow
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
In hevc decoder, there is a possible out of bounds write due to an integer overflow. This could lead to remote escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11104718; Issue ID: MSV-8297.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
MediaTek chipset · MediaTek, Inc.
MT6761; MT8766; MT8768 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20464
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20464
www.mediatek.com
https://www.mediatek.com/product-security-bulletin/August-2026
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