CVE-2026-53136 Details
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)
A vulnerability in the Linux kernel's AMD display driver can lead to heap corruption. This issue arises because the VBIOS information tables contain unvalidated fields that specify the number of HDMI retimer registers. A malformed VBIOS can exploit this by indicating a register count of up to 255, which exceeds the bounds of the allocated arrays, causing an out-of-bounds write in the heap during the driver probe process. The vulnerability affects several versions of the Linux kernel.
Users can update to the latest version of the Linux kernel, where this vulnerability has been fixed. Instructions for updating the kernel can be found in the official Linux kernel documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/029571d51140650783be4fb98fe7cb4754752086 | kernel.org | Patch |
| https://git.kernel.org/stable/c/3f32d52ec604c659725d865cf8cc6a17a33f9c6a | kernel.org | Patch |
| https://git.kernel.org/stable/c/4d1c3c26c2ab1842e139e61983395d64bd2e518b | kernel.org | Patch |
| https://git.kernel.org/stable/c/5f8b39452fb16f507c9e4d8b4a83ce27e893307c | kernel.org | Patch |
| https://git.kernel.org/stable/c/8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d6be8e59af412623e3d874be3a048406c0edfe60 | kernel.org | Patch |
| https://git.kernel.org/stable/c/fb0707ce00eef4e2d60c3020e1c0432739703e4a | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.15, < 5.15.210 >= 5.16, < 6.1.176 >= 6.2, < 6.6.143 >= 6.7, < 6.12.94 >= 6.13, < 6.18.36 >= 6.19, < 7.0.13 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 7.1 rc5 7.1 rc6 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 7, 2026 | Initial Analysis | [email protected] |
| Jun 29, 2026 | CVE Modified | kernel.org |
| Jun 25, 2026 | New CVE Received | kernel.org |