Answer in brief
CVE-2026-53137 records a High severity (CVSS 7.8) vulnerability in drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=eff682f83c9c2030761e7536c5d97e1b20f71c15 <3c4444aec06c74fbc05661f370954ac814963c38 || >=eff682f83c9c2030761e7536c5d97e1b20f71c15 <91fb41218c413989d8b6c837748751454b452d68 || >=eff682f83c9c2030761e7536c5d97e1b20f71c15 <964e50ef7b8f09815a7d05b8326af700f8d5bc96 || >=eff682f83c9c2030761e7536c5d97e1b20f71c15 <79e0273272a05fb26f9b1e55bf1a52eefc3b7b35 || >=eff682f83c9c2030761e7536c5d97e1b20f71c15 <bfba882cfcd08f6540f72f48e786b6404f5d2c5b || >=eff682f83c9c2030761e7536c5d97e1b20f71c15 <1906064d50d194a145486e5caf3db3e708b6f6ef || >=eff682f83c9c2030761e7536c5d97e1b20f71c15 <98cfb7530ea91d8e5e928285cdce58e1131f6e83 || >=eff682f83c9c2030761e7536c5d97e1b20f71c15 <f0f3981c43b32cadfe373d636d9e9ca522bb3702 | 3c4444aec06c74fbc05661f370954ac814963c38, 91fb41218c413989d8b6c837748751454b452d68, 964e50ef7b8f09815a7d05b8326af700f8d5bc96, 79e0273272a05fb26f9b1e55bf1a52eefc3b7b35, bfba882cfcd08f6540f72f48e786b6404f5d2c5b, 1906064d50d194a145486e5caf3db3e708b6f6ef, 98cfb7530ea91d8e5e928285cdce58e1131f6e83, f0f3981c43b32cadfe373d636d9e9ca522bb3702 |
| Linux/Linuxgeneric | 5.6 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
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)
Quoted source text, attributed separately from HOL analysis.