CVE-2022-48975

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpio/gpiolib.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6daaa84b621485fe28c401be18debf92ae8ef04a", "status": "affected", "version": "159f3cd92f17c61a4e2a47456de5865b114ef88e", "versionType": "git"}, {"lessThan": "371363716398ed718e389bea8c5e9843a79dde4e", "status": "affected", "version": "159f3cd92f17c61a4e2a47456de5865b114ef88e", "versionType": "git"}, {"lessThan": "ec851b23084b3a0af8bf0f5e51d33a8d678bdc49", "status": "affected", "version": "159f3cd92f17c61a4e2a47456de5865b114ef88e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpio/gpiolib.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.6"}, {"lessThan": "4.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.83", "versionType": "semver"}, {"lessThanOrEqual": "6.0.*", "status": "unaffected", "version": "6.0.13", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "DF176C32-811C-421C-964D-E3513DD1789F", "versionEndExcluding": "5.15.83", "versionStartIncluding": "4.6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "389392A7-81C4-4C26-884B-8C7CF0F53DA4", "versionEndExcluding": "6.0.13", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*", "matchCriteriaId": "1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*", "matchCriteriaId": "35B26BE4-43A6-4A36-A7F6-5B3F572D9186", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:*", "matchCriteriaId": "3FFFB0B3-930D-408A-91E2-BAE0C2715D80", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:*", "matchCriteriaId": "8535320E-A0DB-4277-800E-D0CE5BBA59E8", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc8:*:*:*:*:*:*", "matchCriteriaId": "21718AA4-4056-40F2-968E-BDAA465A7872", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpiolib: fix memory leak in gpiochip_setup_dev()\n\nHere is a backtrace report about memory leak detected in\ngpiochip_setup_dev():\n\nunreferenced object 0xffff88810b406400 (size 512):\n comm \"python3\", pid 1682, jiffies 4295346908 (age 24.090s)\n backtrace:\n kmalloc_trace\n device_add\t\tdevice_private_init at drivers/base/core.c:3361\n\t\t\t(inlined by) device_add at drivers/base/core.c:3411\n cdev_device_add\n gpiolib_cdev_register\n gpiochip_setup_dev\n gpiochip_add_data_with_key\n\ngcdev_register() & gcdev_unregister() would call device_add() &\ndevice_del() (no matter CONFIG_GPIO_CDEV is enabled or not) to\nregister/unregister device.\n\nHowever, if device_add() succeeds, some resource (like\nstruct device_private allocated by device_private_init())\nis not released by device_del().\n\nTherefore, after device_add() succeeds by gcdev_register(), it\nneeds to call put_device() to release resource in the error handle\npath.\n\nHere we move forward the register of release function, and let it\nrelease every piece of resource by put_device() instead of kfree().\n\nWhile at it, fix another subtle issue, i.e. when gc->ngpio is equal\nto 0, we still call kcalloc() and, in case of further error, kfree()\non the ZERO_PTR pointer, which is not NULL. It's not a bug per se,\nbut rather waste of the resources and potentially wrong expectation\nabout contents of the gdev->descs variable."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: gpiolib: reparar p\u00e9rdida de memoria en gpiochip_setup_dev() Aqu\u00ed hay un informe de seguimiento sobre la p\u00e9rdida de memoria detectada en gpiochip_setup_dev(): objeto sin referencia 0xffff88810b406400 (tama\u00f1o 512): comm \"python3\", pid 1682, jiffies 4295346908 (edad 24.090s) seguimiento: kmalloc_trace device_add device_private_init en drivers/base/core.c:3361 (en l\u00ednea por) device_add en drivers/base/core.c:3411 cdev_device_add gpiolib_cdev_register gpiochip_setup_dev gpiochip_add_data_with_key gcdev_register() y gcdev_unregister() llamar\u00edan device_add() y device_del() (sin importar si CONFIG_GPIO_CDEV est\u00e1 habilitado o no) para registrar/anular el registro del dispositivo. Sin embargo, si device_add() tiene \u00e9xito, alg\u00fan recurso (como la estructura device_private asignada por device_private_init()) no es liberado por device_del(). Por lo tanto, despu\u00e9s de que device_add() tenga \u00e9xito por gcdev_register(), necesita llamar a put_device() para liberar el recurso en la ruta del controlador de error. Aqu\u00ed avanzamos el registro de la funci\u00f3n de liberaci\u00f3n y dejamos que libere cada pieza de recurso por put_device() en lugar de kfree(). Mientras lo hacemos, solucionamos otro problema sutil, es decir, cuando gc->ngpio es igual a 0, todav\u00eda llamamos a kcalloc() y, en caso de un error adicional, a kfree() en el puntero ZERO_PTR, que no es NULL. No es un error en s\u00ed, sino m\u00e1s bien un desperdicio de recursos y una expectativa potencialmente err\u00f3nea sobre el contenido de la variable gdev->descs."}], "id": "CVE-2022-48975", "lastModified": "2026-06-17T05:16:45.373", "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-2022-48975", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-22T13:18:35.922105Z", "version": "2.0.3"}}]}, "published": "2024-10-21T20:15:09.597", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/371363716398ed718e389bea8c5e9843a79dde4e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6daaa84b621485fe28c401be18debf92ae8ef04a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ec851b23084b3a0af8bf0f5e51d33a8d678bdc49"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2023:6583", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-362.8.1.el9_3", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}, {"advisory": "RHSA-2023:6583", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-362.8.1.el9_3", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}], "bugzilla": {"description": "kernel: gpiolib: fix memory leak in gpiochip_setup_dev()", "id": "2320704", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320704"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "status": "verified"}, "cwe": "CWE-401", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ngpiolib: fix memory leak in gpiochip_setup_dev()\nHere is a backtrace report about memory leak detected in\ngpiochip_setup_dev():\nunreferenced object 0xffff88810b406400 (size 512):\ncomm \"python3\", pid 1682, jiffies 4295346908 (age 24.090s)\nbacktrace:\nkmalloc_trace\ndevice_adddevice_private_init at drivers/base/core.c:3361\n(inlined by) device_add at drivers/base/core.c:3411\ncdev_device_add\ngpiolib_cdev_register\ngpiochip_setup_dev\ngpiochip_add_data_with_key\ngcdev_register() & gcdev_unregister() would call device_add() &\ndevice_del() (no matter CONFIG_GPIO_CDEV is enabled or not) to\nregister/unregister device.\nHowever, if device_add() succeeds, some resource (like\nstruct device_private allocated by device_private_init())\nis not released by device_del().\nTherefore, after device_add() succeeds by gcdev_register(), it\nneeds to call put_device() to release resource in the error handle\npath.\nHere we move forward the register of release function, and let it\nrelease every piece of resource by put_device() instead of kfree().\nWhile at it, fix another subtle issue, i.e. when gc->ngpio is equal\nto 0, we still call kcalloc() and, in case of further error, kfree()\non the ZERO_PTR pointer, which is not NULL. It's not a bug per se,\nbut rather waste of the resources and potentially wrong expectation\nabout contents of the gdev->descs variable."], "name": "CVE-2022-48975", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-48975\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-48975\nhttps://lore.kernel.org/linux-cve-announce/2024102145-CVE-2022-48975-d7f9@gregkh/T"], "threat_severity": "Moderate"}

{}