Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add null pointer check for get_first_active_display() The function mod_hdcp_hdcp1_enable_encryption() calls the function get_first_active_display(), but does not check its return value. The return value is a null pointer if the display list is empty. This will lead to a null pointer dereference in mod_hdcp_hdcp2_enable_encryption(). Add a null pointer check for get_first_active_display() and return MOD_HDCP_STATUS_DISPLAY_NOT_FOUND if the function return null.
Product status
2deade5ede56581722c0d7672f28b09548dc0fc4 (git) before 34d3e10ab905f06445f8dbd8a3d9697095e71bae
2deade5ede56581722c0d7672f28b09548dc0fc4 (git) before 1ebcdf38887949def1a553ff3e45c98ed95a3cd0
2deade5ede56581722c0d7672f28b09548dc0fc4 (git) before 5148c7ea69e9c5bf2f05081190f45ba96d3d1e7a
2deade5ede56581722c0d7672f28b09548dc0fc4 (git) before 4ce9f2dc9ff7cc410e8c5d936ec551e26b9599a9
2deade5ede56581722c0d7672f28b09548dc0fc4 (git) before b3005145eab98d36777660b8893466e4f630ae1c
2deade5ede56581722c0d7672f28b09548dc0fc4 (git) before c3e9826a22027a21d998d3e64882fa377b613006
5.8
Any version before 5.8
5.15.187 (semver)
6.1.143 (semver)
6.6.96 (semver)
6.12.36 (semver)
6.15.5 (semver)
6.16 (original_commit_for_fix)
References
lists.debian.org/debian-lts-announce/2025/10/msg00008.html
git.kernel.org/...c/34d3e10ab905f06445f8dbd8a3d9697095e71bae
git.kernel.org/...c/1ebcdf38887949def1a553ff3e45c98ed95a3cd0
git.kernel.org/...c/5148c7ea69e9c5bf2f05081190f45ba96d3d1e7a
git.kernel.org/...c/4ce9f2dc9ff7cc410e8c5d936ec551e26b9599a9
git.kernel.org/...c/b3005145eab98d36777660b8893466e4f630ae1c
git.kernel.org/...c/c3e9826a22027a21d998d3e64882fa377b613006