{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2020-36776", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-26T17:07:27.434Z", "datePublished": "2024-02-27T18:40:25.615Z", "dateUpdated": "2026-05-11T13:42:40.648Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:42:40.648Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthermal/drivers/cpufreq_cooling: Fix slab OOB issue\n\nSlab OOB issue is scanned by KASAN in cpu_power_to_freq().\nIf power is limited below the power of OPP0 in EM table,\nit will cause slab out-of-bound issue with negative array\nindex.\n\nReturn the lowest frequency if limited power cannot found\na suitable OPP in EM table to fix this issue.\n\nBacktrace:\n[<ffffffd02d2a37f0>] die+0x104/0x5ac\n[<ffffffd02d2a5630>] bug_handler+0x64/0xd0\n[<ffffffd02d288ce4>] brk_handler+0x160/0x258\n[<ffffffd02d281e5c>] do_debug_exception+0x248/0x3f0\n[<ffffffd02d284488>] el1_dbg+0x14/0xbc\n[<ffffffd02d75d1d4>] __kasan_report+0x1dc/0x1e0\n[<ffffffd02d75c2e0>] kasan_report+0x10/0x20\n[<ffffffd02d75def8>] __asan_report_load8_noabort+0x18/0x28\n[<ffffffd02e6fce5c>] cpufreq_power2state+0x180/0x43c\n[<ffffffd02e6ead80>] power_actor_set_power+0x114/0x1d4\n[<ffffffd02e6fac24>] allocate_power+0xaec/0xde0\n[<ffffffd02e6f9f80>] power_allocator_throttle+0x3ec/0x5a4\n[<ffffffd02e6ea888>] handle_thermal_trip+0x160/0x294\n[<ffffffd02e6edd08>] thermal_zone_device_check+0xe4/0x154\n[<ffffffd02d351cb4>] process_one_work+0x5e4/0xe28\n[<ffffffd02d352f44>] worker_thread+0xa4c/0xfac\n[<ffffffd02d360124>] kthread+0x33c/0x358\n[<ffffffd02d289940>] ret_from_fork+0xc/0x18"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": 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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7.8"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c24a20912eef00587416628149c438e885eb1304"}, {"url": "https://git.kernel.org/stable/c/876a5f33e5d961d879c5436987c09b3d9ef70379"}, {"url": "https://git.kernel.org/stable/c/6bf443acf6ca4f666d0e4225614ba9993a3aa1a9"}, {"url": "https://git.kernel.org/stable/c/34ab17cc6c2c1ac93d7e5d53bb972df9a968f085"}], "title": "thermal/drivers/cpufreq_cooling: Fix slab OOB issue", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T17:37:07.187Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/c24a20912eef00587416628149c438e885eb1304", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/876a5f33e5d961d879c5436987c09b3d9ef70379", "tags": ["x_transferred"]}, {"url": 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"providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:19.691Z"}}], "cna": {"title": "thermal/drivers/cpufreq_cooling: Fix slab OOB issue", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "371a3bc79c11b707d7a1b7a2c938dc3cc042fffb", "lessThan": "c24a20912eef00587416628149c438e885eb1304", "versionType": "git"}, {"status": "affected", "version": "371a3bc79c11b707d7a1b7a2c938dc3cc042fffb", "lessThan": "876a5f33e5d961d879c5436987c09b3d9ef70379", "versionType": "git"}, {"status": "affected", "version": "371a3bc79c11b707d7a1b7a2c938dc3cc042fffb", "lessThan": "6bf443acf6ca4f666d0e4225614ba9993a3aa1a9", "versionType": "git"}, {"status": "affected", "version": "371a3bc79c11b707d7a1b7a2c938dc3cc042fffb", "lessThan": "34ab17cc6c2c1ac93d7e5d53bb972df9a968f085", "versionType": "git"}, {"status": "affected", "version": "39e0651cac9c80865b2838f297f95ffc0f34a1d8", "versionType": "git"}, {"status": "affected", "version": "febe56f21371ba1e51e8586c3ddf8f54fc62fe61", "versionType": "git"}, {"status": "affected", "version": "d3b7bacd1115400b94482dfc7efffc175c29b831", "versionType": "git"}, {"status": "affected", "version": "9006b543384ab10902819364c1205f11a1458571", "versionType": "git"}], "programFiles": ["drivers/thermal/cpufreq_cooling.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.8"}, {"status": "unaffected", "version": "0", "lessThan": "5.8", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.36", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.11.20", "versionType": "semver", "lessThanOrEqual": "5.11.*"}, {"status": "unaffected", "version": "5.12.3", "versionType": "semver", "lessThanOrEqual": "5.12.*"}, {"status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/thermal/cpufreq_cooling.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/c24a20912eef00587416628149c438e885eb1304"}, {"url": "https://git.kernel.org/stable/c/876a5f33e5d961d879c5436987c09b3d9ef70379"}, {"url": "https://git.kernel.org/stable/c/6bf443acf6ca4f666d0e4225614ba9993a3aa1a9"}, {"url": "https://git.kernel.org/stable/c/34ab17cc6c2c1ac93d7e5d53bb972df9a968f085"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthermal/drivers/cpufreq_cooling: Fix slab OOB issue\n\nSlab OOB issue is scanned by KASAN in cpu_power_to_freq().\nIf power is limited below the power of OPP0 in EM table,\nit will cause slab out-of-bound issue with negative array\nindex.\n\nReturn the lowest frequency if limited power cannot found\na suitable OPP in EM table to fix this issue.\n\nBacktrace:\n[<ffffffd02d2a37f0>] die+0x104/0x5ac\n[<ffffffd02d2a5630>] bug_handler+0x64/0xd0\n[<ffffffd02d288ce4>] brk_handler+0x160/0x258\n[<ffffffd02d281e5c>] do_debug_exception+0x248/0x3f0\n[<ffffffd02d284488>] el1_dbg+0x14/0xbc\n[<ffffffd02d75d1d4>] __kasan_report+0x1dc/0x1e0\n[<ffffffd02d75c2e0>] kasan_report+0x10/0x20\n[<ffffffd02d75def8>] __asan_report_load8_noabort+0x18/0x28\n[<ffffffd02e6fce5c>] cpufreq_power2state+0x180/0x43c\n[<ffffffd02e6ead80>] power_actor_set_power+0x114/0x1d4\n[<ffffffd02e6fac24>] allocate_power+0xaec/0xde0\n[<ffffffd02e6f9f80>] power_allocator_throttle+0x3ec/0x5a4\n[<ffffffd02e6ea888>] handle_thermal_trip+0x160/0x294\n[<ffffffd02e6edd08>] thermal_zone_device_check+0xe4/0x154\n[<ffffffd02d351cb4>] process_one_work+0x5e4/0xe28\n[<ffffffd02d352f44>] worker_thread+0xa4c/0xfac\n[<ffffffd02d360124>] kthread+0x33c/0x358\n[<ffffffd02d289940>] ret_from_fork+0xc/0x18"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.36", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.11.20", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.12.3", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.13", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.14.189"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.19.134"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.4.53"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.7.8"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:42:40.648Z"}}}, "cveMetadata": {"cveId": "CVE-2020-36776", "state": "PUBLISHED", "dateUpdated": "2026-05-11T13:42:40.648Z", "dateReserved": "2024-02-26T17:07:27.434Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-02-27T18:40:25.615Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3B760ADC-7139-4E69-BD9F-4944140A9E34", "versionEndExcluding": "5.10.36", "versionStartIncluding": "5.8.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "EFB425F0-C28C-4B44-8B4C-AD512AA832DE", "versionEndExcluding": "5.11.20", "versionStartIncluding": "5.11.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C3814FA3-8141-4313-A852-8C4212BE12AD", "versionEndExcluding": "5.12.3", "versionStartIncluding": "5.12.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthermal/drivers/cpufreq_cooling: Fix slab OOB issue\n\nSlab OOB issue is scanned by KASAN in cpu_power_to_freq().\nIf power is limited below the power of OPP0 in EM table,\nit will cause slab out-of-bound issue with negative array\nindex.\n\nReturn the lowest frequency if limited power cannot found\na suitable OPP in EM table to fix this issue.\n\nBacktrace:\n[<ffffffd02d2a37f0>] die+0x104/0x5ac\n[<ffffffd02d2a5630>] bug_handler+0x64/0xd0\n[<ffffffd02d288ce4>] brk_handler+0x160/0x258\n[<ffffffd02d281e5c>] do_debug_exception+0x248/0x3f0\n[<ffffffd02d284488>] el1_dbg+0x14/0xbc\n[<ffffffd02d75d1d4>] __kasan_report+0x1dc/0x1e0\n[<ffffffd02d75c2e0>] kasan_report+0x10/0x20\n[<ffffffd02d75def8>] __asan_report_load8_noabort+0x18/0x28\n[<ffffffd02e6fce5c>] cpufreq_power2state+0x180/0x43c\n[<ffffffd02e6ead80>] power_actor_set_power+0x114/0x1d4\n[<ffffffd02e6fac24>] allocate_power+0xaec/0xde0\n[<ffffffd02e6f9f80>] power_allocator_throttle+0x3ec/0x5a4\n[<ffffffd02e6ea888>] handle_thermal_trip+0x160/0x294\n[<ffffffd02e6edd08>] thermal_zone_device_check+0xe4/0x154\n[<ffffffd02d351cb4>] process_one_work+0x5e4/0xe28\n[<ffffffd02d352f44>] worker_thread+0xa4c/0xfac\n[<ffffffd02d360124>] kthread+0x33c/0x358\n[<ffffffd02d289940>] ret_from_fork+0xc/0x18"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: Thermal/drivers/cpufreq_cooling: solucionar el problema de Slab OOB El problema de Slab OOB es escaneado por KASAN en cpu_power_to_freq(). Si la potencia se limita por debajo de la potencia de OPP0 en la tabla EM, provocar\u00e1 un problema de losa fuera de los l\u00edmites con un \u00edndice de matriz negativo. Devuelve la frecuencia m\u00e1s baja si la potencia limitada no puede encontrar un OPP adecuado en la tabla EM para solucionar este problema. Seguimiento inverso: [] die+0x104/0x5ac [] bug_handler+0x64/0xd0 [] brk_handler+0x160/0x258 [] do_debug_exception+0x 248/0x3f0 [] el1_dbg+0x14 /0xbc [] __kasan_report+0x1dc/0x1e0 [] kasan_report+0x10/0x20 [] __asan_report_load8_noabort+0x18/0x28 [] cpufreq_power2state+0x180/0x43c [] power_actor_set_power+0x114 /0x1d4 [] allocate_power+0xaec/0xde0 [] power_allocator_throttle+0x3ec/0x5a4 [] handle_thermal_trip+0x160/0x294 [] t\u00e9rmico _zone_device_check+0xe4/0x154 [] proceso_one_work+0x5e4 /0xe28 [] work_thread+0xa4c/0xfac [] kthread+0x33c/0x358 [] ret_from_fork+0xc/0x18"}], "id": "CVE-2020-36776", "lastModified": "2024-11-21T05:30:17.090", "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"}]}, "published": "2024-02-27T19:04:05.693", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/34ab17cc6c2c1ac93d7e5d53bb972df9a968f085"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6bf443acf6ca4f666d0e4225614ba9993a3aa1a9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/876a5f33e5d961d879c5436987c09b3d9ef70379"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c24a20912eef00587416628149c438e885eb1304"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/34ab17cc6c2c1ac93d7e5d53bb972df9a968f085"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6bf443acf6ca4f666d0e4225614ba9993a3aa1a9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/876a5f33e5d961d879c5436987c09b3d9ef70379"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c24a20912eef00587416628149c438e885eb1304"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-129"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: thermal/drivers/cpufreq_cooling: Fix slab OOB issue", "id": "2266748", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2266748"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-126", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nthermal/drivers/cpufreq_cooling: Fix slab OOB issue\nSlab OOB issue is scanned by KASAN in cpu_power_to_freq().\nIf power is limited below the power of OPP0 in EM table,\nit will cause slab out-of-bound issue with negative array\nindex.\nReturn the lowest frequency if limited power cannot found\na suitable OPP in EM table to fix this issue.\nBacktrace:\n[<ffffffd02d2a37f0>] die+0x104/0x5ac\n[<ffffffd02d2a5630>] bug_handler+0x64/0xd0\n[<ffffffd02d288ce4>] brk_handler+0x160/0x258\n[<ffffffd02d281e5c>] do_debug_exception+0x248/0x3f0\n[<ffffffd02d284488>] el1_dbg+0x14/0xbc\n[<ffffffd02d75d1d4>] __kasan_report+0x1dc/0x1e0\n[<ffffffd02d75c2e0>] kasan_report+0x10/0x20\n[<ffffffd02d75def8>] __asan_report_load8_noabort+0x18/0x28\n[<ffffffd02e6fce5c>] cpufreq_power2state+0x180/0x43c\n[<ffffffd02e6ead80>] power_actor_set_power+0x114/0x1d4\n[<ffffffd02e6fac24>] allocate_power+0xaec/0xde0\n[<ffffffd02e6f9f80>] power_allocator_throttle+0x3ec/0x5a4\n[<ffffffd02e6ea888>] handle_thermal_trip+0x160/0x294\n[<ffffffd02e6edd08>] thermal_zone_device_check+0xe4/0x154\n[<ffffffd02d351cb4>] process_one_work+0x5e4/0xe28\n[<ffffffd02d352f44>] worker_thread+0xa4c/0xfac\n[<ffffffd02d360124>] kthread+0x33c/0x358\n[<ffffffd02d289940>] ret_from_fork+0xc/0x18", "A flaw was found in the Linux kernel. The cpu_power_to_freq function in the drivers/thermal/cpufreq_cooling.c file can trigger an out-of-bounds read vulnerability when the power value cannot be found in the EM table. This issue can result in a denial of service."], "name": "CVE-2020-36776", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-36776\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-36776\nhttps://lore.kernel.org/linux-cve-announce/20240227184057.2368370-1-gregkh@linuxfoundation.org/T/#u"], "statement": "The kernel as shipped by Red Hat Enterprise Linux 8 and 9 is not affected by this vulnerability. In RHEL8, the vulnerable code is not present, and in RHEL9, this issue was already fixed.", "threat_severity": "Low"}

{}