{"cve":"CVE-2024-26940","nvd":{"published":"2024-05-01T06:15:09.343","modified":"2026-06-17T07:18:44.697","status":"Analyzed","description":"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","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/016119154981d81c9e8f2ea3f56b9e2b4ea14500","https://git.kernel.org/stable/c/042ef0afc40fa1a22b3608f22915b91ce39d128f","https://git.kernel.org/stable/c/25e3ce59c1200f1f0563e39de151f34962ab0fe1","https://git.kernel.org/stable/c/4be9075fec0a639384ed19975634b662bfab938f","https://git.kernel.org/stable/c/eb08db0fc5354fa17b7ed66dab3c503332423451"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:49:08.435428910+00:00"},"epss":{"cve":"CVE-2024-26940","score":0.00227,"percentile":0.13477,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}