{"schema_version":"1.9.0","id":"CVE-2024-26940","published":"2024-05-01T05:17:48.607Z","modified":"2026-08-12T03:51:40.160650349Z","related":["SUSE-SU-2024:2008-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2135-1","SUSE-SU-2024:2190-1","SUSE-SU-2024:2203-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20249-1"],"summary":"drm/vmwgfx: Create debugfs ttm_resource_manager entry only if needed","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Create debugfs ttm_resource_manager entry only if needed\n\nThe driver creates /sys/kernel/debug/dri/0/mob_ttm even when the\ncorresponding ttm_resource_manager is not allocated.\nThis leads to a crash when trying to read from this file.\n\nAdd a check to create mob_ttm, system_mob_ttm, and gmr_ttm debug file\nonly when the corresponding ttm_resource_manager is allocated.\n\ncrash> bt\nPID: 3133409  TASK: ffff8fe4834a5000  CPU: 3    COMMAND: \"grep\"\n #0 [ffffb954506b3b20] machine_kexec at ffffffffb2a6bec3\n #1 [ffffb954506b3b78] __crash_kexec at ffffffffb2bb598a\n #2 [ffffb954506b3c38] crash_kexec at ffffffffb2bb68c1\n #3 [ffffb954506b3c50] oops_end at ffffffffb2a2a9b1\n #4 [ffffb954506b3c70] no_context at ffffffffb2a7e913\n #5 [ffffb954506b3cc8] __bad_area_nosemaphore at ffffffffb2a7ec8c\n #6 [ffffb954506b3d10] do_page_fault at ffffffffb2a7f887\n #7 [ffffb954506b3d40] page_fault at ffffffffb360116e\n    [exception RIP: ttm_resource_manager_debug+0x11]\n    RIP: ffffffffc04afd11  RSP: ffffb954506b3df0  RFLAGS: 00010246\n    RAX: ffff8fe41a6d1200  RBX: 0000000000000000  RCX: 0000000000000940\n    RDX: 0000000000000000  RSI: ffffffffc04b4338  RDI: 0000000000000000\n    RBP: ffffb954506b3e08   R8: ffff8fee3ffad000   R9: 0000000000000000\n    R10: ffff8fe41a76a000  R11: 0000000000000001  R12: 00000000ffffffff\n    R13: 0000000000000001  R14: ffff8fe5bb6f3900  R15: ffff8fe41a6d1200\n    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018\n #8 [ffffb954506b3e00] ttm_resource_manager_show at ffffffffc04afde7 [ttm]\n #9 [ffffb954506b3e30] seq_read at ffffffffb2d8f9f3\n    RIP: 00007f4c4eda8985  RSP: 00007ffdbba9e9f8  RFLAGS: 00000246\n    RAX: ffffffffffffffda  RBX: 000000000037e000  RCX: 00007f4c4eda8985\n    RDX: 000000000037e000  RSI: 00007f4c41573000  RDI: 0000000000000003\n    RBP: 000000000037e000   R8: 0000000000000000   R9: 000000000037fe30\n    R10: 0000000000000000  R11: 0000000000000246  R12: 00007f4c41573000\n    R13: 0000000000000003  R14: 00007f4c41572010  R15: 0000000000000003\n    ORIG_RAX: 0000000000000000  CS: 0033  SS: 002b","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6"},{"fixed":"016119154981d81c9e8f2ea3f56b9e2b4ea14500"},{"fixed":"042ef0afc40fa1a22b3608f22915b91ce39d128f"},{"fixed":"25e3ce59c1200f1f0563e39de151f34962ab0fe1"},{"fixed":"eb08db0fc5354fa17b7ed66dab3c503332423451"},{"fixed":"4be9075fec0a639384ed19975634b662bfab938f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26940.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.19.0"},{"fixed":"6.1.84"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.24"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.7.12"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.8.0"},{"fixed":"6.8.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26940.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/016119154981d81c9e8f2ea3f56b9e2b4ea14500"},{"type":"WEB","url":"https://git.kernel.org/stable/c/042ef0afc40fa1a22b3608f22915b91ce39d128f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/25e3ce59c1200f1f0563e39de151f34962ab0fe1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4be9075fec0a639384ed19975634b662bfab938f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb08db0fc5354fa17b7ed66dab3c503332423451"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26940.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26940"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26940.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}