drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size
Summary
| CVE | CVE-2026-53137 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-06-25 09:16:31 UTC |
| Updated | 2026-06-25 09:16:31 UTC |
| 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) |
Risk And Classification
EPSS: 0.002120000 probability, percentile 0.114330000 (date 2026-06-28)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected eff682f83c9c2030761e7536c5d97e1b20f71c15 3c4444aec06c74fbc05661f370954ac814963c38 git | Not specified |
| CNA | Linux | Linux | affected eff682f83c9c2030761e7536c5d97e1b20f71c15 91fb41218c413989d8b6c837748751454b452d68 git | Not specified |
| CNA | Linux | Linux | affected eff682f83c9c2030761e7536c5d97e1b20f71c15 964e50ef7b8f09815a7d05b8326af700f8d5bc96 git | Not specified |
| CNA | Linux | Linux | affected eff682f83c9c2030761e7536c5d97e1b20f71c15 79e0273272a05fb26f9b1e55bf1a52eefc3b7b35 git | Not specified |
| CNA | Linux | Linux | affected eff682f83c9c2030761e7536c5d97e1b20f71c15 bfba882cfcd08f6540f72f48e786b6404f5d2c5b git | Not specified |
| CNA | Linux | Linux | affected eff682f83c9c2030761e7536c5d97e1b20f71c15 1906064d50d194a145486e5caf3db3e708b6f6ef git | Not specified |
| CNA | Linux | Linux | affected eff682f83c9c2030761e7536c5d97e1b20f71c15 98cfb7530ea91d8e5e928285cdce58e1131f6e83 git | Not specified |
| CNA | Linux | Linux | affected eff682f83c9c2030761e7536c5d97e1b20f71c15 f0f3981c43b32cadfe373d636d9e9ca522bb3702 git | Not specified |
| CNA | Linux | Linux | affected 5.6 | Not specified |
| CNA | Linux | Linux | unaffected 5.6 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.259 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.210 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.176 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.143 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.94 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.36 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.13 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/964e50ef7b8f09815a7d05b8326af700f8d5bc96 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f0f3981c43b32cadfe373d636d9e9ca522bb3702 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/79e0273272a05fb26f9b1e55bf1a52eefc3b7b35 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/98cfb7530ea91d8e5e928285cdce58e1131f6e83 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/bfba882cfcd08f6540f72f48e786b6404f5d2c5b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/91fb41218c413989d8b6c837748751454b452d68 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3c4444aec06c74fbc05661f370954ac814963c38 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1906064d50d194a145486e5caf3db3e708b6f6ef | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.