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
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
eff682f83c9c2030761e7536c5d97e1b20f71c15 to < 3c4444aec06c74fbc05661f370954ac814963c38affectedeff682f83c9c2030761e7536c5d97e1b20f71c15 to < 91fb41218c413989d8b6c837748751454b452d68affectedeff682f83c9c2030761e7536c5d97e1b20f71c15 to < 964e50ef7b8f09815a7d05b8326af700f8d5bc96affectedeff682f83c9c2030761e7536c5d97e1b20f71c15 to < 79e0273272a05fb26f9b1e55bf1a52eefc3b7b35affectedeff682f83c9c2030761e7536c5d97e1b20f71c15 to < bfba882cfcd08f6540f72f48e786b6404f5d2c5baffectedeff682f83c9c2030761e7536c5d97e1b20f71c15 to < 1906064d50d194a145486e5caf3db3e708b6f6efaffectedeff682f83c9c2030761e7536c5d97e1b20f71c15 to < 98cfb7530ea91d8e5e928285cdce58e1131f6e83affectedeff682f83c9c2030761e7536c5d97e1b20f71c15 to < f0f3981c43b32cadfe373d636d9e9ca522bb3702affected
Linux Linux
Default version status: affected
5.6affected0 to < 5.6unaffected5.10.259 to ≤ 5.10.*unaffected5.15.210 to ≤ 5.15.*unaffected6.1.176 to ≤ 6.1.*unaffected6.6.143 to ≤ 6.6.*unaffected6.12.94 to ≤ 6.12.*unaffected6.18.36 to ≤ 6.18.*unaffected7.0.13 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
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 ↗