CVE-2026-53136drm/amd/display: Clamp VBIOS HDMI retimer register count to array size
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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)
- CVSS
- 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Jun 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a before 029571d51140650783be4fb98fe7cb4754752086; from 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a before 5f8b39452fb16f507c9e4d8b4a83ce27e893307c; from 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a before 4d1c3c26c2ab1842e139e61983395d64bd2e518b; from 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a before d6be8e59af412623e3d874be3a048406c0edfe60; from 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a before 3f32d52ec604c659725d865cf8cc6a17a33f9c6a; from 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a before 8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117; from 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a before fb0707ce00eef4e2d60c3020e1c0432739703e4a | CNA record |
linux linux_kernel linux:linux_kernel | from 4.15 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; 7.1; and 4 more ranges | NVD |
References
- https://git.kernel.org/stable/c/029571d51140650783be4fb98fe7cb4754752086patch
- https://git.kernel.org/stable/c/5f8b39452fb16f507c9e4d8b4a83ce27e893307cpatch
- https://git.kernel.org/stable/c/4d1c3c26c2ab1842e139e61983395d64bd2e518bpatch
- https://git.kernel.org/stable/c/d6be8e59af412623e3d874be3a048406c0edfe60patch
- https://git.kernel.org/stable/c/3f32d52ec604c659725d865cf8cc6a17a33f9c6apatch
- https://git.kernel.org/stable/c/8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117patch
- https://git.kernel.org/stable/c/fb0707ce00eef4e2d60c3020e1c0432739703e4apatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.