{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47195", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-25T09:12:14.114Z", "datePublished": "2024-04-10T18:56:31.999Z", "dateUpdated": "2024-08-04T05:32:07.110Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:03:42.426Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: fix use-after-free of the add_lock mutex\n\nCommit 6098475d4cb4 (\"spi: Fix deadlock when adding SPI controllers on\nSPI buses\") introduced a per-controller mutex. But mutex_unlock() of\nsaid lock is called after the controller is already freed:\n\n spi_unregister_controller(ctlr)\n -> put_device(&ctlr->dev)\n -> spi_controller_release(dev)\n -> mutex_unlock(&ctrl->add_lock)\n\nMove the put_device() after the mutex_unlock()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/spi/spi.c"], "versions": [{"version": "6098475d4cb4", "lessThan": "37330f37f666", "status": "affected", "versionType": "git"}, {"version": "6098475d4cb4", "lessThan": "6c53b45c71b4", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/spi/spi.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "custom"}, {"version": "5.15.5", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/37330f37f6666c7739a44b2b6b95b047ccdbed2d"}, {"url": "https://git.kernel.org/stable/c/6c53b45c71b4920b5e62f0ea8079a1da382b9434"}], "title": "spi: fix use-after-free of the add_lock mutex", "x_generator": {"engine": "bippy-a5840b7849dd"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47195", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-04-10T19:52:25.727067Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:13:36.222Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:07.110Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/37330f37f6666c7739a44b2b6b95b047ccdbed2d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/6c53b45c71b4920b5e62f0ea8079a1da382b9434", "tags": ["x_transferred"]}]}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9E41D489-7457-4244-B477-AF077373C777", "versionEndExcluding": "5.15.5", "versionStartExcluding": "5.15.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: fix use-after-free of the add_lock mutex\n\nCommit 6098475d4cb4 (\"spi: Fix deadlock when adding SPI controllers on\nSPI buses\") introduced a per-controller mutex. But mutex_unlock() of\nsaid lock is called after the controller is already freed:\n\n spi_unregister_controller(ctlr)\n -> put_device(&ctlr->dev)\n -> spi_controller_release(dev)\n -> mutex_unlock(&ctrl->add_lock)\n\nMove the put_device() after the mutex_unlock()."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: spi: corrige el use-after-free del mutex add_lock. El commit 6098475d4cb4 (\"spi: corrige el punto muerto al agregar controladores SPI en buses SPI\") introdujo un mutex por controlador. Pero mutex_unlock() de dicho bloqueo se llama despu\u00e9s de que el controlador ya est\u00e1 liberado: spi_unregister_controller(ctlr) -> put_device(&ctlr->dev) -> spi_controller_release(dev) -> mutex_unlock(&ctrl->add_lock) Mueva put_device() despu\u00e9s el mutex_unlock()."}], "id": "CVE-2021-47195", "lastModified": "2024-04-19T19:16:08.537", "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": "2024-04-10T19:15:47.853", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/37330f37f6666c7739a44b2b6b95b047ccdbed2d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6c53b45c71b4920b5e62f0ea8079a1da382b9434"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: spi: fix use-after-free of the add_lock mutex", "id": "2274614", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2274614"}, "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-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nspi: fix use-after-free of the add_lock mutex\nCommit 6098475d4cb4 (\"spi: Fix deadlock when adding SPI controllers on\nSPI buses\") introduced a per-controller mutex. But mutex_unlock() of\nsaid lock is called after the controller is already freed:\nspi_unregister_controller(ctlr)\n-> put_device(&ctlr->dev)\n-> spi_controller_release(dev)\n-> mutex_unlock(&ctrl->add_lock)\nMove the put_device() after the mutex_unlock().", "A use-after-free of the add_lock mutex was found in drivers/spi/spi.c.in the Linux kernel."], "name": "CVE-2021-47195", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "2024-04-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47195\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47195\nhttps://lore.kernel.org/linux-cve-announce/2024041035-CVE-2021-47195-38e8@gregkh/T"], "statement": "Red Hat Enterprise Linux 8 and 9 are not affected by this vulnerability.", "threat_severity": "Moderate", "upstream_fix": "kernel 5.15.5, kernel 5.16"}