cve-2021-47202
Vulnerability from cvelistv5
Published
2024-04-10 18:56
Modified
2024-12-19 07:37
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: thermal: Fix NULL pointer dereferences in of_thermal_ functions of_parse_thermal_zones() parses the thermal-zones node and registers a thermal_zone device for each subnode. However, if a thermal zone is consuming a thermal sensor and that thermal sensor device hasn't probed yet, an attempt to set trip_point_*_temp for that thermal zone device can cause a NULL pointer dereference. Fix it. console:/sys/class/thermal/thermal_zone87 # echo 120000 > trip_point_0_temp ... Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 ... Call trace: of_thermal_set_trip_temp+0x40/0xc4 trip_point_temp_store+0xc0/0x1dc dev_attr_store+0x38/0x88 sysfs_kf_write+0x64/0xc0 kernfs_fop_write_iter+0x108/0x1d0 vfs_write+0x2f4/0x368 ksys_write+0x7c/0xec __arm64_sys_write+0x20/0x30 el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc do_el0_svc+0x28/0xa0 el0_svc+0x14/0x24 el0_sync_handler+0x88/0xec el0_sync+0x1c0/0x200 While at it, fix the possible NULL pointer dereference in other functions as well: of_thermal_get_temp(), of_thermal_set_emul_temp(), of_thermal_get_trend().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccacPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/828f4c31684da94ecf0b44a2cbd35bbede04f0bdPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccacPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/828f4c31684da94ecf0b44a2cbd35bbede04f0bdPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28ePatch
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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Fix it.\\n\\n console:/sys/class/thermal/thermal_zone87 # echo 120000 \u003e trip_point_0_temp\\n ...\\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020\\n ...\\n Call trace:\\n  of_thermal_set_trip_temp+0x40/0xc4\\n  trip_point_temp_store+0xc0/0x1dc\\n  dev_attr_store+0x38/0x88\\n  sysfs_kf_write+0x64/0xc0\\n  kernfs_fop_write_iter+0x108/0x1d0\\n  vfs_write+0x2f4/0x368\\n  ksys_write+0x7c/0xec\\n  __arm64_sys_write+0x20/0x30\\n  el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc\\n  do_el0_svc+0x28/0xa0\\n  el0_svc+0x14/0x24\\n  el0_sync_handler+0x88/0xec\\n  el0_sync+0x1c0/0x200\\n\\nWhile at it, fix the possible NULL pointer dereference in other\\nfunctions as well: of_thermal_get_temp(), of_thermal_set_emul_temp(),\\nof_thermal_get_trend().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: thermal: Fix NULL pointer dereferences in of_thermal_ functions of_parse_thermal_zones() analiza el nodo thermal-zones y registra un dispositivo thermal_zone para cada subnodo. Sin embargo, si una zona t\u00e9rmica est\u00e1 consumiendo un sensor t\u00e9rmico y ese dispositivo de sensor t\u00e9rmico a\u00fan no ha realizado la prueba, un intento de establecer trip_point_*_temp para ese dispositivo de zona t\u00e9rmica puede provocar una desreferencia de puntero NULL. Arr\u00e9glelo. console:/sys/class/thermal/thermal_zone87 # echo 120000 \u0026gt; trip_point_0_temp ... No se puede manejar la desreferencia del puntero NULL del n\u00facleo en la direcci\u00f3n virtual 0000000000000020 ... Seguimiento de llamadas: of_thermal_set_trip_temp+0x40/0xc4 trip_point_temp_store+0xc0/0x1dc dev_attr_store+0x38/0x88 sysfs_kf_write+0x64/0xc0 kernfs_fop_write_iter+0x108/0x1d0 vfs_write+0x2f4/0x368 ksys_write+0x7c/0xec __arm64_sys_write+0x20/0x30 el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc do_el0_svc+0x28/0xa0 el0_svc+0x14/0x24 el0_sync_handler+0x88/0xec el0_sync+0x1c0/0x200 Mientras tanto, corrija tambi\u00e9n la posible desreferencia del puntero NULL en otras funciones: of_thermal_get_temp(), of_thermal_set_emul_temp(), of_thermal_get_trend().\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.4.210\",\"matchCriteriaId\":\"769A1563-4E73-4FA2-BDEB-9DBD40989582\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.81\",\"matchCriteriaId\":\"36581F45-F01C-4014-84F2-F7F59F4F5D10\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.14.21\",\"matchCriteriaId\":\"542D1BE5-8431-4A4D-8523-C35DF9570429\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15\",\"versionEndExcluding\":\"5.15.4\",\"matchCriteriaId\":\"562752F1-191C-49DC-921A-2032FAC48FD4\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/828f4c31684da94ecf0b44a2cbd35bbede04f0bd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccac\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/828f4c31684da94ecf0b44a2cbd35bbede04f0bd\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/828f4c31684da94ecf0b44a2cbd35bbede04f0bd\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccac\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:07.362Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47202\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:49:58.504831Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:17.645Z\"}}], \"cna\": {\"title\": \"thermal: Fix NULL pointer dereferences in of_thermal_ functions\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"828f4c31684da94ecf0b44a2cbd35bbede04f0bd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"6a315471cb6a07f651e1d3adc8962730f4fcccac\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"0750f769b95841b34a9fe8c418dd792ff526bf86\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"ef2590a5305e0b8e9342f84c2214aa478ee7f28e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"96cfe05051fd8543cdedd6807ec59a0e6c409195\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/thermal/thermal_of.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.4.210\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.81\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14.21\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/thermal/thermal_of.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/828f4c31684da94ecf0b44a2cbd35bbede04f0bd\"}, {\"url\": \"https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccac\"}, {\"url\": \"https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86\"}, {\"url\": \"https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28e\"}, {\"url\": \"https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nthermal: Fix NULL pointer dereferences in of_thermal_ functions\\n\\nof_parse_thermal_zones() parses the thermal-zones node and registers a\\nthermal_zone device for each subnode. However, if a thermal zone is\\nconsuming a thermal sensor and that thermal sensor device hasn\u0027t probed\\nyet, an attempt to set trip_point_*_temp for that thermal zone device\\ncan cause a NULL pointer dereference. Fix it.\\n\\n console:/sys/class/thermal/thermal_zone87 # echo 120000 \u003e trip_point_0_temp\\n ...\\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020\\n ...\\n Call trace:\\n  of_thermal_set_trip_temp+0x40/0xc4\\n  trip_point_temp_store+0xc0/0x1dc\\n  dev_attr_store+0x38/0x88\\n  sysfs_kf_write+0x64/0xc0\\n  kernfs_fop_write_iter+0x108/0x1d0\\n  vfs_write+0x2f4/0x368\\n  ksys_write+0x7c/0xec\\n  __arm64_sys_write+0x20/0x30\\n  el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc\\n  do_el0_svc+0x28/0xa0\\n  el0_svc+0x14/0x24\\n  el0_sync_handler+0x88/0xec\\n  el0_sync+0x1c0/0x200\\n\\nWhile at it, fix the possible NULL pointer dereference in other\\nfunctions as well: of_thermal_get_temp(), of_thermal_set_emul_temp(),\\nof_thermal_get_trend().\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T07:37:20.138Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47202\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T07:37:20.138Z\", \"dateReserved\": \"2024-03-25T09:12:14.117Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-10T18:56:36.408Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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