{"id":"CVE-2023-53991","summary":"drm/msm/dpu: Disallow unallocated resources to be returned","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/dpu: Disallow unallocated resources to be returned\n\nIn the event that the topology requests resources that have not been\ncreated by the system (because they are typically not represented in\ndpu_mdss_cfg ^1), the resource(s) in global_state (in this case DSC\nblocks, until their allocation/assignment is being sanity-checked in\n\"drm/msm/dpu: Reject topologies for which no DSC blocks are available\")\nremain NULL but will still be returned out of\ndpu_rm_get_assigned_resources, where the caller expects to get an array\ncontaining num_blks valid pointers (but instead gets these NULLs).\n\nTo prevent this from happening, where null-pointer dereferences\ntypically result in a hard-to-debug platform lockup, num_blks shouldn't\nincrease past NULL blocks and will print an error and break instead.\nAfter all, max_blks represents the static size of the maximum number of\nblocks whereas the actual amount varies per platform.\n\n^1: which can happen after a git rebase ended up moving additions to\n_dpu_cfg to a different struct which has the same patch context.\n\nPatchwork: https://patchwork.freedesktop.org/patch/517636/","modified":"2026-03-20T12:33:23.331525Z","published":"2025-12-24T10:55:29.833Z","related":["SUSE-SU-2026:0263-1","SUSE-SU-2026:0317-1","SUSE-SU-2026:0411-1","SUSE-SU-2026:0617-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53991.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/8dbd54d679e3ab37be43bc1ed9f463dbf83a2259"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9e1e236acdc42b5c43ec8d7f03a39537e70cc309"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9fe3644c720ac87d150f0bba5a4ae86cae55afaf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/abc40122d9a69f56c04efb5a7485795f5ac799d1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bf661c5e3bc48973acb363c76e3db965d9ed26d0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53991.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53991"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bb00a452d6f77391441ef7df48f7115dd459cd2f"},{"fixed":"8dbd54d679e3ab37be43bc1ed9f463dbf83a2259"},{"fixed":"bf661c5e3bc48973acb363c76e3db965d9ed26d0"},{"fixed":"9e1e236acdc42b5c43ec8d7f03a39537e70cc309"},{"fixed":"9fe3644c720ac87d150f0bba5a4ae86cae55afaf"},{"fixed":"abc40122d9a69f56c04efb5a7485795f5ac799d1"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53991.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.7.0"},{"fixed":"5.10.173"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.99"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.2.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53991.json"}}],"schema_version":"1.7.5"}