In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size [Why & How] The VBIOS integrated info tables (v1_11 and v2_1) contain HdmiRegNum and Hdmi6GRegNum fields that are used as loop bounds when copying retimer I2C register settings into fixed-size arrays (dp*_ext_hdmi_reg_settings[9] and dp*_ext_hdmi_6g_reg_settings[3]). These u8 fields are not validated before use, so a malformed VBIOS can specify values up to 255, causing an out-of-bounds heap write during driver probe. Clamp each register count to the destination array size using min_t() before the copy loops, in both get_integrated_info_v11() and get_integrated_info_v2_1(). (cherry picked from commit 5a7f0ef90195940c54b0f5bb85b87da55f038c69)

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  • Linux Kernel

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References
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https://git.kernel.org/stable/c/029571d51140650783be4fb98fe7cb4754752086 cve-icon
https://git.kernel.org/stable/c/3f32d52ec604c659725d865cf8cc6a17a33f9c6a cve-icon
https://git.kernel.org/stable/c/4d1c3c26c2ab1842e139e61983395d64bd2e518b cve-icon
https://git.kernel.org/stable/c/5f8b39452fb16f507c9e4d8b4a83ce27e893307c cve-icon
https://git.kernel.org/stable/c/8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117 cve-icon
https://git.kernel.org/stable/c/d6be8e59af412623e3d874be3a048406c0edfe60 cve-icon
https://git.kernel.org/stable/c/fb0707ce00eef4e2d60c3020e1c0432739703e4a cve-icon
History

Thu, 25 Jun 2026 11:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-122

Thu, 25 Jun 2026 09:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size [Why & How] The VBIOS integrated info tables (v1_11 and v2_1) contain HdmiRegNum and Hdmi6GRegNum fields that are used as loop bounds when copying retimer I2C register settings into fixed-size arrays (dp*_ext_hdmi_reg_settings[9] and dp*_ext_hdmi_6g_reg_settings[3]). These u8 fields are not validated before use, so a malformed VBIOS can specify values up to 255, causing an out-of-bounds heap write during driver probe. Clamp each register count to the destination array size using min_t() before the copy loops, in both get_integrated_info_v11() and get_integrated_info_v2_1(). (cherry picked from commit 5a7f0ef90195940c54b0f5bb85b87da55f038c69)
Title drm/amd/display: Clamp VBIOS HDMI retimer register count to array size
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-06-25T08:38:25.097Z

Reserved: 2026-06-09T07:44:35.387Z

Link: CVE-2026-53136

cve-icon Vulnrichment

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Updated: 2026-06-25T11:15:10Z