System-privilege escalation via Audio HAL use-after-free
Published Sep 7, 2026 · Updated Sep 8, 2026
Use-after-free in the MediaTek Chipset Audio HAL allows local users with System privilege to escalate privileges without interaction. MediaTek has not disclosed which Audio HAL object is freed or which later operation dereferences it. Exploitation requires existing System privilege and can grant higher local privileges; no user interaction is required.
Summary
What happened
Use-after-free in the MediaTek Chipset Audio HAL allows local users with System privilege to escalate privileges without interaction. MediaTek has not disclosed which Audio HAL object is freed or which later operation dereferences it. Exploitation requires existing System privilege and can grant higher local privileges; no user interaction is required.
The record
- CVE
- CVE-2026-20507
- Published
- Sep 7, 2026
- Updated
- Sep 8, 2026
- Vendor
- MediaTek
- Product
- MediaTek Chipset
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Sep 7, 2026CVE publishedPublication date reported by the CVE source.
- Sep 8, 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=MT6739
- Affected versionversion=MT6761
- Affected versionversion=MT6765
- Affected versionversion=MT6768
- Affected versionversion=MT6769
- Affected versionversion=MT6781
- Affected versionversion=MT6789
- Affected versionversion=MT6833
- Affected versionversion=MT6835
- Affected versionversion=MT6853
- Affected versionversion=MT6855
- Affected versionversion=MT6858
- Affected versionversion=MT6877
- Affected versionversion=MT6878
- Affected versionversion=MT6879
- Affected versionversion=MT6881
- Affected versionversion=MT6883
- Affected versionversion=MT6885
- Affected versionversion=MT6886
- Affected versionversion=MT6889
- Affected versionversion=MT6893
- Affected versionversion=MT6895
- Affected versionversion=MT6897
- Affected versionversion=MT6899
- Affected versionversion=MT6983
- Affected versionversion=MT6985
- Affected versionversion=MT6989
- Affected versionversion=MT6991
- Affected versionversion=MT6993
- Affected versionversion=MT8126
- Affected versionversion=MT8168
- Affected versionversion=MT8171
- Affected versionversion=MT8186
- Affected versionversion=MT8188
- Affected versionversion=MT8189
- Affected versionversion=MT8196
- Affected versionversion=MT8321
- Affected versionversion=MT8365
- Affected versionversion=MT8367
- Affected versionversion=MT8385
- Affected versionversion=MT8390
- Affected versionversion=MT8391
- Affected versionversion=MT8668
- Affected versionversion=MT8676
- Affected versionversion=MT8678
- Affected versionversion=MT8696
- Affected versionversion=MT8755
- Affected versionversion=MT8766
- Affected versionversion=MT8766R
- Affected versionversion=MT8768
- Affected versionversion=MT8771
- Affected versionversion=MT8775
- Affected versionversion=MT8781
- Affected versionversion=MT8786
- Affected versionversion=MT8788E
- Affected versionversion=MT8791T
- Affected versionversion=MT8792
- Affected versionversion=MT8796
- Affected versionversion=MT8797
- Affected versionversion=MT8798
- Affected versionversion=MT8799
- Affected versionversion=MT8873
- Affected versionversion=MT8883
- Affected versionversion=MT8893
- Affected versionversion=MT8910
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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