CVE-2026-53137
drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size
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)
INFO
Published Date :
June 25, 2026, 9:16 a.m.
Last Modified :
July 7, 2026, 4:51 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Clamp read length to rx_id_list buffer size.
- Apply the fix used in the DP branch.
- Update the Linux kernel to the patched version.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53137.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53137 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53137
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53137 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53137 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 07, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-787 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.176 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.143 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.210 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.94 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.6 up to (excluding) 5.10.259 Added Reference Type kernel.org: https://git.kernel.org/stable/c/1906064d50d194a145486e5caf3db3e708b6f6ef Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3c4444aec06c74fbc05661f370954ac814963c38 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/79e0273272a05fb26f9b1e55bf1a52eefc3b7b35 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/91fb41218c413989d8b6c837748751454b452d68 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/964e50ef7b8f09815a7d05b8326af700f8d5bc96 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/98cfb7530ea91d8e5e928285cdce58e1131f6e83 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/bfba882cfcd08f6540f72f48e786b6404f5d2c5b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f0f3981c43b32cadfe373d636d9e9ca522bb3702 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'eff682f83c9c2030761e7536c5d97e1b20f71c15', 'lessThan': '3c4444aec06c74fbc05661f370954ac814963c38', 'versionType': 'git'}, {'status': 'affected', 'version': 'eff682f83c9c2030761e7536c5d97e1b20f71c15', 'lessThan': '91fb41218c413989d8b6c837748751454b452d68', 'versionType': 'git'}, {'status': 'affected', 'version': 'eff682f83c9c2030761e7536c5d97e1b20f71c15', 'lessThan': '964e50ef7b8f09815a7d05b8326af700f8d5bc96', 'versionType': 'git'}, {'status': 'affected', 'version': 'eff682f83c9c2030761e7536c5d97e1b20f71c15', 'lessThan': '79e0273272a05fb26f9b1e55bf1a52eefc3b7b35', 'versionType': 'git'}, {'status': 'affected', 'version': 'eff682f83c9c2030761e7536c5d97e1b20f71c15', 'lessThan': 'bfba882cfcd08f6540f72f48e786b6404f5d2c5b', 'versionType': 'git'}, {'status': 'affected', 'version': 'eff682f83c9c2030761e7536c5d97e1b20f71c15', 'lessThan': '1906064d50d194a145486e5caf3db3e708b6f6ef', 'versionType': 'git'}, {'status': 'affected', 'version': 'eff682f83c9c2030761e7536c5d97e1b20f71c15', 'lessThan': '98cfb7530ea91d8e5e928285cdce58e1131f6e83', 'versionType': 'git'}, {'status': 'affected', 'version': 'eff682f83c9c2030761e7536c5d97e1b20f71c15', 'lessThan': 'f0f3981c43b32cadfe373d636d9e9ca522bb3702', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.259', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c'], 'defaultStatus': 'affected'}] Added 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) Added Reference https://git.kernel.org/stable/c/1906064d50d194a145486e5caf3db3e708b6f6ef Added Reference https://git.kernel.org/stable/c/3c4444aec06c74fbc05661f370954ac814963c38 Added Reference https://git.kernel.org/stable/c/79e0273272a05fb26f9b1e55bf1a52eefc3b7b35 Added Reference https://git.kernel.org/stable/c/91fb41218c413989d8b6c837748751454b452d68 Added Reference https://git.kernel.org/stable/c/964e50ef7b8f09815a7d05b8326af700f8d5bc96 Added Reference https://git.kernel.org/stable/c/98cfb7530ea91d8e5e928285cdce58e1131f6e83 Added Reference https://git.kernel.org/stable/c/bfba882cfcd08f6540f72f48e786b6404f5d2c5b Added Reference https://git.kernel.org/stable/c/f0f3981c43b32cadfe373d636d9e9ca522bb3702