Description
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)
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | eff682f83c9c2030761e7536c5d97e1b20f71c15 to <3c4444aec06c74fbc05661f370954ac814963c38; eff682f83c9c2030761e7536c5d97e1b20f71c15 to <91fb41218c413989d8b6c837748751454b452d68; eff682f83c9c2030761e7536c5d97e1b20f71c15 to <964e50ef7b8f09815a7d05b8326af700f8d5bc96; eff682f83c9c2030761e7536c5d97e1b20f71c15 to <79e0273272a05fb26f9b1e55bf1a52eefc3b7b35; eff682f83c9c2030761e7536c5d97e1b20f71c15 to <bfba882cfcd08f6540f72f48e786b6404f5d2c5b; eff682f83c9c2030761e7536c5d97e1b20f71c15 to <1906064d50d194a145486e5caf3db3e708b6f6ef; eff682f83c9c2030761e7536c5d97e1b20f71c15 to <98cfb7530ea91d8e5e928285cdce58e1131f6e83; eff682f83c9c2030761e7536c5d97e1b20f71c15 to <f0f3981c43b32cadfe373d636d9e9ca522bb3702 |
| Linux | Linux | 5.6; 0 to <5.6; 5.10.259 to <=5.10.*; 5.15.210 to <=5.15.*; 6.1.176 to <=6.1.*; 6.6.143 to <=6.6.*; 6.12.94 to <=6.12.*; 6.18.36 to <=6.18.*; 7.0.13 to <=7.0.*; 7.1 to <=* |
References
- https://git.kernel.org/stable/c/3c4444aec06c74fbc05661f370954ac814963c38
- https://git.kernel.org/stable/c/91fb41218c413989d8b6c837748751454b452d68
- https://git.kernel.org/stable/c/964e50ef7b8f09815a7d05b8326af700f8d5bc96
- https://git.kernel.org/stable/c/79e0273272a05fb26f9b1e55bf1a52eefc3b7b35
- https://git.kernel.org/stable/c/bfba882cfcd08f6540f72f48e786b6404f5d2c5b
- https://git.kernel.org/stable/c/1906064d50d194a145486e5caf3db3e708b6f6ef
- https://git.kernel.org/stable/c/98cfb7530ea91d8e5e928285cdce58e1131f6e83
- https://git.kernel.org/stable/c/f0f3981c43b32cadfe373d636d9e9ca522bb3702
Generated from the official CVE List on 25 Jun 2026 10:14 UTC.