Local privilege escalation via slbc type confusion
Published May 4, 2026 · Updated May 4, 2026
Type confusion in the slbc subcomponent of affected MediaTek chipsets allows local users with System privilege to escalate privileges. The component accesses a resource using an incompatible type, causing an out-of-bounds write; MediaTek has not disclosed the specific function or attacker-controlled input. Exploitation is local, requires preexisting System privilege, needs no user interaction, and can compromise confidentiality, integrity, and availability.
Summary
What happened
Type confusion in the slbc subcomponent of affected MediaTek chipsets allows local users with System privilege to escalate privileges. The component accesses a resource using an incompatible type, causing an out-of-bounds write; MediaTek has not disclosed the specific function or attacker-controlled input. Exploitation is local, requires preexisting System privilege, needs no user interaction, and can compromise confidentiality, integrity, and availability.
The record
- CVE
- CVE-2026-20451
- Published
- May 4, 2026
- Updated
- May 4, 2026
- Vendor
- MediaTek
- Product
- MediaTek Chipset
- Classifications
- CWE-843, T1404
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- May 4, 2026CVE publishedPublication date reported by the CVE source.
- May 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=MT2718
- Affected versionversion=MT6899
- Affected versionversion=MT6985
- Affected versionversion=MT6989
- Affected versionversion=MT6991
- Affected versionversion=MT8115
- Affected versionversion=MT8186
- Affected versionversion=MT8188
- Affected versionversion=MT8196
- Affected versionversion=MT8365
- Affected versionversion=MT8367
- Affected versionversion=MT8370
- Affected versionversion=MT8371
- Affected versionversion=MT8390
- Affected versionversion=MT8391
- Affected versionversion=MT8395
- Affected versionversion=MT8676
- Affected versionversion=MT8678
- Affected versionversion=MT8766
- Affected versionversion=MT8768
- Affected versionversion=MT8775
- Affected versionversion=MT8781
- Affected versionversion=MT8786
- Affected versionversion=MT8788E
- Affected versionversion=MT8791T
- Affected versionversion=MT8792
- Affected versionversion=MT8793
- Affected versionversion=MT8796
- Affected versionversion=MT8873
- Affected versionversion=MT8883
- Affected versionversion=MT8893
- Affected versionversion=MT8910
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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