CVE-2026-53058 Details
Description
In the Linux kernel, the following vulnerability has been resolved: drm/bridge: cadence: cdns-mhdp8546-core: Set the mhdp connector earlier in atomic_enable() In case if we get errors in cdns_mhdp_link_up() or cdns_mhdp_reg_read() in atomic_enable, we will go to cdns_mhdp_modeset_retry_fn() and will hit NULL pointer while trying to access the mutex. We need the connector to be set before that. Unlike in legacy cases with flag !DRM_BRIDGE_ATTACH_NO_CONNECTOR, we do not have connector initialised in bridge_attach(), so add the mhdp->connector_ptr in device structure to handle both cases with DRM_BRIDGE_ATTACH_NO_CONNECTOR and !DRM_BRIDGE_ATTACH_NO_CONNECTOR, set it in atomic_enable() earlier to avoid possible NULL pointer dereference in recovery paths like modeset_retry_fn() with the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag set.
A vulnerability in the Linux kernel's handling of the Cadence CDNS-MHDP8546 bridge can lead to a NULL pointer dereference. This issue arises because the connector is not properly initialized before it is accessed, particularly in cases where the 'DRM_BRIDGE_ATTACH_NO_CONNECTOR' flag is set. The vulnerability is present in the atomic enable function of the CDNS-MHDP8546 bridge, where errors in linking or reading registers can trigger a recovery process that accesses an uninitialized mutex, potentially causing a crash.
The vulnerability has been addressed in the Linux kernel. Users should upgrade to the latest version where this issue has been fixed.
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/1af3b42e08a957e53bab8e1897393fe0a27d9fbf | kernel.org | Patch |
| https://git.kernel.org/stable/c/43d6508ddbf9fb974fbc359a033154f78c9d4c8b | kernel.org | Patch |
| https://git.kernel.org/stable/c/5302015daf26ef6b48e067f2b86c9482ac19e015 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a3611554e599d1a24b45fd8415bacb72ce861e4b | kernel.org | Patch |
| https://git.kernel.org/stable/c/cf2ac2cac8b319f89b3a3851ca0c5ffb6a549575 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.6, < 6.6.141 >= 6.7, < 6.12.91 >= 6.13, < 6.18.33 >= 6.19, < 7.0.10 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 21, 2026 | Initial Analysis | [email protected] |
| Jun 24, 2026 | New CVE Received | kernel.org |