Medium 5.5Published Jun 24, 2026

CVE-2026-53058drm/bridge: cadence: cdns-mhdp8546-core: Set the mhdp connector earlier in atomic_enable()

Updated under an hour ago (Oct 28, 2026, 9:10 AM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from c932ced6b58524eeb948ff252f6512cd6bcb9d9f before 5302015daf26ef6b48e067f2b86c9482ac19e015; from c932ced6b58524eeb948ff252f6512cd6bcb9d9f before a3611554e599d1a24b45fd8415bacb72ce861e4b; from c932ced6b58524eeb948ff252f6512cd6bcb9d9f before cf2ac2cac8b319f89b3a3851ca0c5ffb6a549575; from c932ced6b58524eeb948ff252f6512cd6bcb9d9f before 1af3b42e08a957e53bab8e1897393fe0a27d9fbf; from c932ced6b58524eeb948ff252f6512cd6bcb9d9f before 43d6508ddbf9fb974fbc359a033154f78c9d4c8b	CNA record
linux linux_kernel linux:linux_kernel	from 6.6 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10	NVD

References

References

https://git.kernel.org/stable/c/5302015daf26ef6b48e067f2b86c9482ac19e015	patch
https://git.kernel.org/stable/c/a3611554e599d1a24b45fd8415bacb72ce861e4b	patch
https://git.kernel.org/stable/c/cf2ac2cac8b319f89b3a3851ca0c5ffb6a549575	patch
https://git.kernel.org/stable/c/1af3b42e08a957e53bab8e1897393fe0a27d9fbf	patch
https://git.kernel.org/stable/c/43d6508ddbf9fb974fbc359a033154f78c9d4c8b	patch

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.