Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected eff682f83c9c2030761e7536c5d97e1b20f71c15 before 3c4444aec06c74fbc05661f370954ac814963c38; affected eff682f83c9c2030761e7536c5d97e1b20f71c15 before 91fb41218c413989d8b6c837748751454b452d68; affected eff682f83c9c2030761e7536c5d97e1b20f71c15 before 964e50ef7b8f09815a7d05b8326af700f8d5bc96; affected eff682f83c9c2030761e7536c5d97e1b20f71c15 before 79e0273272a05fb26f9b1e55bf1a52eefc3b7b35; affected eff682f83c9c2030761e7536c5d97e1b20f71c15 before bfba882cfcd08f6540f72f48e786b6404f5d2c5b; affected eff682f83c9c2030761e7536c5d97e1b20f71c15 before 1906064d50d194a145486e5caf3db3e708b6f6ef; affected eff682f83c9c2030761e7536c5d97e1b20f71c15 before 98cfb7530ea91d8e5e928285cdce58e1131f6e83; affected eff682f83c9c2030761e7536c5d97e1b20f71c15 before f0f3981c43b32cadfe373d636d9e9ca522bb3702 |
| Linux / Linux | affected 5.6; unaffected 0 before 5.6; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.94 through 6.12.*; unaffected 6.18.36 through 6.18.*; unaffected 7.0.13 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
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