CVE-2024-26940 (GCVE-0-2024-26940)

Vulnerability from cvelistv5 – Published: 2024-05-01 05:17 – Updated: 2025-05-04 09:00
VLAI?
Title
drm/vmwgfx: Create debugfs ttm_resource_manager entry only if needed
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Create debugfs ttm_resource_manager entry only if needed The driver creates /sys/kernel/debug/dri/0/mob_ttm even when the corresponding ttm_resource_manager is not allocated. This leads to a crash when trying to read from this file. Add a check to create mob_ttm, system_mob_ttm, and gmr_ttm debug file only when the corresponding ttm_resource_manager is allocated. crash> bt PID: 3133409 TASK: ffff8fe4834a5000 CPU: 3 COMMAND: "grep" #0 [ffffb954506b3b20] machine_kexec at ffffffffb2a6bec3 #1 [ffffb954506b3b78] __crash_kexec at ffffffffb2bb598a #2 [ffffb954506b3c38] crash_kexec at ffffffffb2bb68c1 #3 [ffffb954506b3c50] oops_end at ffffffffb2a2a9b1 #4 [ffffb954506b3c70] no_context at ffffffffb2a7e913 #5 [ffffb954506b3cc8] __bad_area_nosemaphore at ffffffffb2a7ec8c #6 [ffffb954506b3d10] do_page_fault at ffffffffb2a7f887 #7 [ffffb954506b3d40] page_fault at ffffffffb360116e [exception RIP: ttm_resource_manager_debug+0x11] RIP: ffffffffc04afd11 RSP: ffffb954506b3df0 RFLAGS: 00010246 RAX: ffff8fe41a6d1200 RBX: 0000000000000000 RCX: 0000000000000940 RDX: 0000000000000000 RSI: ffffffffc04b4338 RDI: 0000000000000000 RBP: ffffb954506b3e08 R8: ffff8fee3ffad000 R9: 0000000000000000 R10: ffff8fe41a76a000 R11: 0000000000000001 R12: 00000000ffffffff R13: 0000000000000001 R14: ffff8fe5bb6f3900 R15: ffff8fe41a6d1200 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #8 [ffffb954506b3e00] ttm_resource_manager_show at ffffffffc04afde7 [ttm] #9 [ffffb954506b3e30] seq_read at ffffffffb2d8f9f3 RIP: 00007f4c4eda8985 RSP: 00007ffdbba9e9f8 RFLAGS: 00000246 RAX: ffffffffffffffda RBX: 000000000037e000 RCX: 00007f4c4eda8985 RDX: 000000000037e000 RSI: 00007f4c41573000 RDI: 0000000000000003 RBP: 000000000037e000 R8: 0000000000000000 R9: 000000000037fe30 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4c41573000 R13: 0000000000000003 R14: 00007f4c41572010 R15: 0000000000000003 ORIG_RAX: 0000000000000000 CS: 0033 SS: 002b
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6 , < 016119154981d81c9e8f2ea3f56b9e2b4ea14500 (git)
Affected: af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6 , < 042ef0afc40fa1a22b3608f22915b91ce39d128f (git)
Affected: af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6 , < 25e3ce59c1200f1f0563e39de151f34962ab0fe1 (git)
Affected: af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6 , < eb08db0fc5354fa17b7ed66dab3c503332423451 (git)
Affected: af4a25bbe5e7e60ff696ef5c1ec48ab2d51c17c6 , < 4be9075fec0a639384ed19975634b662bfab938f (git)
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    Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.84 , ≤ 6.1.* (semver)
Unaffected: 6.6.24 , ≤ 6.6.* (semver)
Unaffected: 6.7.12 , ≤ 6.7.* (semver)
Unaffected: 6.8.3 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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Show details on NVD website

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\"programFiles\": [\"drivers/gpu/drm/vmwgfx/vmwgfx_drv.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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\u003e 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\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.84\", \"versionStartIncluding\": \"5.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.24\", \"versionStartIncluding\": \"5.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.12\", \"versionStartIncluding\": \"5.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.3\", \"versionStartIncluding\": \"5.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"5.19\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:00:15.819Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26940\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:00:15.819Z\", \"dateReserved\": \"2024-02-19T14:20:24.197Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-01T05:17:48.607Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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Detection rules are retrieved from Rulezet.

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