{"id":"CVE-2024-26940","state":"PUBLISHED","title":"drm/vmwgfx: Create debugfs ttm_resource_manager entry only if needed","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","publishedAt":"2024-05-01T05:17:48.607Z","updatedAt":"2026-05-11T20:07:19.266Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6","status":"affected","lessThan":"016119154981d81c9e8f2ea3f56b9e2b4ea14500","versionType":"git"},{"version":"af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6","status":"affected","lessThan":"042ef0afc40fa1a22b3608f22915b91ce39d128f","versionType":"git"},{"version":"af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6","status":"affected","lessThan":"25e3ce59c1200f1f0563e39de151f34962ab0fe1","versionType":"git"},{"version":"af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6","status":"affected","lessThan":"eb08db0fc5354fa17b7ed66dab3c503332423451","versionType":"git"},{"version":"af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6","status":"affected","lessThan":"4be9075fec0a639384ed19975634b662bfab938f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vmwgfx/vmwgfx_drv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.19","versionType":"semver"},{"version":"6.1.84","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.24","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.12","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8.3","status":"unaffected","lessThanOrEqual":"6.8.*","versionType":"semver"},{"version":"6.9","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vmwgfx/vmwgfx_drv.c"]}],"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/eb08db0fc5354fa17b7ed66dab3c503332423451","https://git.kernel.org/stable/c/4be9075fec0a639384ed19975634b662bfab938f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:10.607Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/26xxx/CVE-2024-26940.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-26940","state":"PUBLISHED","datePublished":"2024-05-01T05:17:48.607Z","dateUpdated":"2026-05-11T20:07:19.266Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-19T14:20:24.197Z"},"containers":{"cna":{"title":"drm/vmwgfx: Create debugfs ttm_resource_manager entry only if needed","descriptions":[{"lang":"en","value":"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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6","status":"affected","lessThan":"016119154981d81c9e8f2ea3f56b9e2b4ea14500","versionType":"git"},{"version":"af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6","status":"affected","lessThan":"042ef0afc40fa1a22b3608f22915b91ce39d128f","versionType":"git"},{"version":"af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6","status":"affected","lessThan":"25e3ce59c1200f1f0563e39de151f34962ab0fe1","versionType":"git"},{"version":"af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6","status":"affected","lessThan":"eb08db0fc5354fa17b7ed66dab3c503332423451","versionType":"git"},{"version":"af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6","status":"affected","lessThan":"4be9075fec0a639384ed19975634b662bfab938f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vmwgfx/vmwgfx_drv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.19","versionType":"semver"},{"version":"6.1.84","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.24","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.12","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8.3","status":"unaffected","lessThanOrEqual":"6.8.*","versionType":"semver"},{"version":"6.9","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vmwgfx/vmwgfx_drv.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/016119154981d81c9e8f2ea3f56b9e2b4ea14500"},{"url":"https://git.kernel.org/stable/c/042ef0afc40fa1a22b3608f22915b91ce39d128f"},{"url":"https://git.kernel.org/stable/c/25e3ce59c1200f1f0563e39de151f34962ab0fe1"},{"url":"https://git.kernel.org/stable/c/eb08db0fc5354fa17b7ed66dab3c503332423451"},{"url":"https://git.kernel.org/stable/c/4be9075fec0a639384ed19975634b662bfab938f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:07:19.266Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.1.84"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.7.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.8.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.9"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2024-06-06T18:58:47.194142Z","id":"CVE-2024-26940","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-noinfo Not enough information"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-11-04T18:50:50.573Z"}},{"title":"CVE Program 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