CVE-2025-21968: drm/amd/display: Fix slab-use-after-free on hdcp_work
First published: Tue Apr 01 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix slab-use-after-free on hdcp_work [Why] A slab-use-after-free is reported when HDCP is destroyed but the property_validate_dwork queue is still running. [How] Cancel the delayed work when destroying workqueue. (cherry picked from commit 725a04ba5a95e89c89633d4322430cfbca7ce128)
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=5.5<5.10.236 | |
| Linux Kernel | >=5.11<5.15.180 | |
| Linux Kernel | >=5.16<6.1.132 | |
| Linux Kernel | >=6.2<6.6.84 | |
| Linux Kernel | >=6.7<6.12.20 | |
| Linux Kernel | >=6.13<6.13.8 | |
| Linux Kernel | =6.14-rc1 | |
| Linux Kernel | =6.14-rc2 | |
| Linux Kernel | =6.14-rc3 | |
| Linux Kernel | =6.14-rc4 | |
| Linux Kernel | =6.14-rc5 | |
| Linux Kernel | =6.14-rc6 |
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Reference Links
- https://git.kernel.org/stable/c/378b361e2e30e9729f9a7676f7926868d14f4326
- https://git.kernel.org/stable/c/4964dbc4191ab436877a5e3ecd9c67a4e50b7c36
- https://git.kernel.org/stable/c/93d701064e56788663d7c5918fbe5e060d5df587
- https://git.kernel.org/stable/c/bac7b8b1a3f1a86eeec85835af106cbdc2b9d9f7
- https://git.kernel.org/stable/c/e65e7bea220c3ce8c4c793b4ba35557f4994ab2b
- https://git.kernel.org/stable/c/06acfdef370ae018dad9592369e2d2fd9a40c09e
- https://git.kernel.org/stable/c/1397715b011bcdc6ad91b17df7acaee301e89db5
Frequently Asked Questions
What is the severity of CVE-2025-21968?
CVE-2025-21968 is classified as a medium severity vulnerability due to potential misuse of memory in the Linux kernel.
How do I fix CVE-2025-21968?
To mitigate CVE-2025-21968, you should update the Linux kernel to the latest patched version that addresses this vulnerability.
What environments are affected by CVE-2025-21968?
CVE-2025-21968 affects systems running the Linux kernel that utilize the AMD display driver with HDCP enabled.
What impact does CVE-2025-21968 have on system security?
CVE-2025-21968 could lead to potential denial-of-service (DoS) conditions, impacting system reliability and security.
How was CVE-2025-21968 discovered?
CVE-2025-21968 was identified through reports of a slab-use-after-free condition occurring during HDCP destruction in the Linux kernel.
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