CVE-2026-53137None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size [Why & How] During HDCP 2.x repeater authentication over HDMI, the driver reads the sink's RxStatus re…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size
[Why & How] During HDCP 2.x repeater authentication over HDMI, the driver reads the sink's RxStatus register and extracts a 10-bit message size field (max value 1023). This value is used as the read length for the ReceiverID list without being clamped to the size of the destination buffer rx_id_list[177]. A malicious HDMI repeater could advertise a message size larger than the buffer, causing an out-of-bounds write during the I2C read.
Clamp the read length in mod_hdcp_read_rx_id_list() to the size of the rx_id_list buffer, matching the approach already used in the DP branch.
(cherry picked from commit 229212219e4247d9486f8ba41ef087358490be09)
Linux >= eff682f83c9c2030761e7536c5d97e1b20f71c15 < 3c4444aec06c74fbc05661f370954ac814963c38Linux >= eff682f83c9c2030761e7536c5d97e1b20f71c15 < 91fb41218c413989d8b6c837748751454b452d68Linux >= eff682f83c9c2030761e7536c5d97e1b20f71c15 < 964e50ef7b8f09815a7d05b8326af700f8d5bc96Linux >= eff682f83c9c2030761e7536c5d97e1b20f71c15 < 79e0273272a05fb26f9b1e55bf1a52eefc3b7b35Linux >= eff682f83c9c2030761e7536c5d97e1b20f71c15 < bfba882cfcd08f6540f72f48e786b6404f5d2c5bLinux >= eff682f83c9c2030761e7536c5d97e1b20f71c15 < 1906064d50d194a145486e5caf3db3e708b6f6efLinux >= eff682f83c9c2030761e7536c5d97e1b20f71c15 < 98cfb7530ea91d8e5e928285cdce58e1131f6e83Linux >= eff682f83c9c2030761e7536c5d97e1b20f71c15 < f0f3981c43b32cadfe373d636d9e9ca522bb3702Linux 5.6Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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