CVE-2021-47202

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Fix it.\n\n console:/sys/class/thermal/thermal_zone87 # echo 120000 > 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()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thermal/thermal_of.c"], "versions": [{"version": 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However, if a thermal zone is\nconsuming a thermal sensor and that thermal sensor device hasn't 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 > 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()."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.210", "versionStartIncluding": "3.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.81", "versionStartIncluding": "3.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.14.21", "versionStartIncluding": "3.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.4", "versionStartIncluding": "3.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.16", "versionStartIncluding": "3.19"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:49:57.314Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47202", "state": "PUBLISHED", "dateUpdated": "2026-05-11T13:49:57.314Z", "dateReserved": "2024-03-25T09:12:14.117Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-04-10T18:56:36.408Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/thermal/thermal_of.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "828f4c31684da94ecf0b44a2cbd35bbede04f0bd", "status": "affected", "version": "2251aef64a38db60f4ae7a4a83f9203c6791f196", "versionType": "git"}, {"lessThan": "6a315471cb6a07f651e1d3adc8962730f4fcccac", "status": "affected", "version": "2251aef64a38db60f4ae7a4a83f9203c6791f196", "versionType": "git"}, {"lessThan": "0750f769b95841b34a9fe8c418dd792ff526bf86", "status": "affected", "version": "2251aef64a38db60f4ae7a4a83f9203c6791f196", "versionType": "git"}, {"lessThan": "ef2590a5305e0b8e9342f84c2214aa478ee7f28e", "status": "affected", "version": "2251aef64a38db60f4ae7a4a83f9203c6791f196", "versionType": "git"}, {"lessThan": "96cfe05051fd8543cdedd6807ec59a0e6c409195", "status": "affected", "version": "2251aef64a38db60f4ae7a4a83f9203c6791f196", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/thermal/thermal_of.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.19"}, {"lessThan": "3.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.210", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.81", "versionType": "semver"}, {"lessThanOrEqual": "5.14.*", "status": "unaffected", "version": "5.14.21", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.16", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "769A1563-4E73-4FA2-BDEB-9DBD40989582", "versionEndExcluding": "5.4.210", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "36581F45-F01C-4014-84F2-F7F59F4F5D10", "versionEndExcluding": "5.10.81", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "542D1BE5-8431-4A4D-8523-C35DF9570429", "versionEndExcluding": "5.14.21", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "562752F1-191C-49DC-921A-2032FAC48FD4", "versionEndExcluding": "5.15.4", "versionStartIncluding": "5.15", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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't 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 > 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 > 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()."}], "id": "CVE-2021-47202", "lastModified": "2026-06-17T04:16:53.997", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-47202", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:49:58.504831Z", "version": "2.0.3"}}]}, "published": "2024-04-10T19:15:48.167", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "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": "af854a3a-2127-422b-91ae-364da2661108", "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: thermal: Fix NULL pointer dereferences in of_thermal_ functions", "id": "2274607", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2274607"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nthermal: Fix NULL pointer dereferences in of_thermal_ functions\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't probed\nyet, an attempt to set trip_point_*_temp for that thermal zone device\ncan cause a NULL pointer dereference. Fix it.\nconsole:/sys/class/thermal/thermal_zone87 # echo 120000 > trip_point_0_temp\n...\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000020\n...\nCall trace:\nof_thermal_set_trip_temp+0x40/0xc4\ntrip_point_temp_store+0xc0/0x1dc\ndev_attr_store+0x38/0x88\nsysfs_kf_write+0x64/0xc0\nkernfs_fop_write_iter+0x108/0x1d0\nvfs_write+0x2f4/0x368\nksys_write+0x7c/0xec\n__arm64_sys_write+0x20/0x30\nel0_svc_common.llvm.7279915941325364641+0xbc/0x1bc\ndo_el0_svc+0x28/0xa0\nel0_svc+0x14/0x24\nel0_sync_handler+0x88/0xec\nel0_sync+0x1c0/0x200\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()."], "name": "CVE-2021-47202", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-04-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47202\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47202\nhttps://lore.kernel.org/linux-cve-announce/2024041037-CVE-2021-47202-58b2@gregkh/T"], "threat_severity": "Low"}

{}