Kernel memory corruption via oversized ReceiverID list
Published Jun 25, 2026 · Updated Jun 25, 2026
Out-of-bounds write in the AMD display driver allows physically proximate attackers to corrupt kernel memory via a malicious HDMI repeater. During HDMI HDCP 2.x repeater authentication, mod_hdcp_read_rx_id_list() uses the sink-controlled 10-bit RxStatus message size, up to 1023 bytes, as the I2C read length into rx_id_list[177] without clamping it to that buffer. Physical connection of a malicious HDMI repeater and execution of HDCP 2.x authentication are required; the oversized read writes beyond the fixed kernel buffer.
Summary
What happened
Out-of-bounds write in the AMD display driver allows physically proximate attackers to corrupt kernel memory via a malicious HDMI repeater. During HDMI HDCP 2.x repeater authentication, mod_hdcp_read_rx_id_list() uses the sink-controlled 10-bit RxStatus message size, up to 1023 bytes, as the I2C read length into rx_id_list[177] without clamping it to that buffer. Physical connection of a malicious HDMI repeater and execution of HDCP 2.x authentication are required; the oversized read writes beyond the fixed kernel buffer.
The record
- CVE
- CVE-2026-53137
- Published
- Jun 25, 2026
- Updated
- Jun 25, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-787, T1200
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 25, 2026CVE publishedPublication date reported by the CVE source.
- Jun 25, 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?
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- Affected versionversion=5.6
- Affected versionversion=eff682f83c9c2030761e7536c5d97e1b20f71c15 <1906064d50d194a145486e5caf3db3e708b6f6ef
- Affected versionversion=eff682f83c9c2030761e7536c5d97e1b20f71c15 <3c4444aec06c74fbc05661f370954ac814963c38
- Affected versionversion=eff682f83c9c2030761e7536c5d97e1b20f71c15 <79e0273272a05fb26f9b1e55bf1a52eefc3b7b35
- Affected versionversion=eff682f83c9c2030761e7536c5d97e1b20f71c15 <91fb41218c413989d8b6c837748751454b452d68
- Affected versionversion=eff682f83c9c2030761e7536c5d97e1b20f71c15 <964e50ef7b8f09815a7d05b8326af700f8d5bc96
- Affected versionversion=eff682f83c9c2030761e7536c5d97e1b20f71c15 <98cfb7530ea91d8e5e928285cdce58e1131f6e83
- Affected versionversion=eff682f83c9c2030761e7536c5d97e1b20f71c15 <bfba882cfcd08f6540f72f48e786b6404f5d2c5b
- Affected versionversion=eff682f83c9c2030761e7536c5d97e1b20f71c15 <f0f3981c43b32cadfe373d636d9e9ca522bb3702
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
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