EUVD-2026-27753
GHSA-2m7x-2cj2-wg69
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3DescriptionNVD
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Adjust PHY FSM transition to TX_EN-to-PLL_ON for TMDS on DCN35
[Why] A backport of the change made for DCN401 that addresses an issue where we turn off the PHY PLL when disabling TMDS output, which causes the OTG to remain stuck.
The OTG being stuck can lead to a hang in the DCHVM's ability to ACK invalidations when it thinks the HUBP is still on but it's not receiving global sync.
The transition to PLL_ON needs to be atomic as there's no guarantee that the thread isn't pre-empted or is able to complete before the IOMMU watchdog times out.
[How] Backport the implementation from dcn401 back to dcn35.
There's a functional difference in when the eDP output is disabled in dcn401 code so we don't want to utilize it directly.
Analysis
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Adjust PHY FSM transition to TX_EN-to-PLL_ON for TMDS on DCN35 [Why] A backport of the change made for DCN401 that addresses an issue where we turn off the PHY PLL when disabling TMDS output, which causes the OTG to remain stuck. The OTG being stuck can lead to a hang in the DCHVM's ability to ACK invalidations when it thinks the HUBP is still on but it's not receiving global sync. …
Sign in for full analysis, threat intelligence, and remediation guidance.
More from same product – last 7 days
Command injection in the shell-quote npm package allows attackers who can influence object-token inputs to inject arbitr
Heap buffer overflow in NGINX Plus and NGINX Open Source ngx_http_rewrite_module allows unauthenticated remote attackers
Kernel availability loss in Ubuntu Linux 6.8, 6.17, and 7.0 can be triggered by any unprivileged local user via a defect
Kernel panic via NULL pointer dereference in Ubuntu Linux 6.8's AppArmor notification handler allows a locally authentic
NULL pointer dereference in Ubuntu Linux kernel versions 6.8, 6.17, and 7.0 allows a local unprivileged user to crash th
Vendor StatusVendor
Share
External POC / Exploit Code
Leaving vuln.today