Answer in brief
CVE-2026-53136 records a High severity (CVSS 7.8) vulnerability in drm/amd/display: Clamp VBIOS HDMI retimer register count to array 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 | >=1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a <029571d51140650783be4fb98fe7cb4754752086 || >=1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a <5f8b39452fb16f507c9e4d8b4a83ce27e893307c || >=1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a <4d1c3c26c2ab1842e139e61983395d64bd2e518b || >=1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a <d6be8e59af412623e3d874be3a048406c0edfe60 || >=1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a <3f32d52ec604c659725d865cf8cc6a17a33f9c6a || >=1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a <8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117 || >=1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a <fb0707ce00eef4e2d60c3020e1c0432739703e4a | 029571d51140650783be4fb98fe7cb4754752086, 5f8b39452fb16f507c9e4d8b4a83ce27e893307c, 4d1c3c26c2ab1842e139e61983395d64bd2e518b, d6be8e59af412623e3d874be3a048406c0edfe60, 3f32d52ec604c659725d865cf8cc6a17a33f9c6a, 8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117, fb0707ce00eef4e2d60c3020e1c0432739703e4a |
| Linux/Linuxgeneric | 4.15 | 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 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)
Quoted source text, attributed separately from HOL analysis.