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{"descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL\n\nIf we fail to copy the just created file descriptor to userland, we\ntry to clean up by putting back 'fd' and freeing 'ib'. The code uses\nput_unused_fd() for the former which is wrong, as the file descriptor\nwas already published by fd_install() which gets called internally by\nanon_inode_getfd().\n\nThis makes the error handling code leaving a half cleaned up file\ndescriptor table around and a partially destructed 'file' object,\nallowing userland to play use-after-free tricks on us, by abusing\nthe still usable fd and making the code operate on a dangling\n'file->private_data' pointer.\n\nInstead of leaving the kernel in a partially corrupted state, don't\nattempt to explicitly clean up and leave this to the process exit\npath that'll release any still valid fds, including the one created\nby the previous call to anon_inode_getfd(). Simply return -EFAULT to\nindicate the error."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: buffer: corrige el manejo de errores relacionados con archivos en IIO_BUFFER_GET_FD_IOCTL Si no logramos copiar el descriptor de archivo reci\u00e9n creado en la zona de usuario, intentamos limpiar colocando de nuevo 'fd' y liberando ' ib'. El c\u00f3digo usa put_unused_fd() para el primero, lo cual es incorrecto, ya que el descriptor de archivo ya fue publicado por fd_install(), que es llamado internamente por anon_inode_getfd(). Esto hace que el c\u00f3digo de manejo de errores deje una tabla de descriptores de archivos medio limpia y un objeto 'archivo' parcialmente destruido, lo que permite que Userland nos juegue trucos de use-after-free, abusando del fd a\u00fan utilizable y haciendo que el c\u00f3digo funcione en un puntero 'archivo->datos_privados' colgando. En lugar de dejar el kernel en un estado parcialmente da\u00f1ado, no intente limpiar expl\u00edcitamente y dejar esto en la ruta de salida del proceso que liberar\u00e1 cualquier fds a\u00fan v\u00e1lido, incluido el creado por la llamada anterior a anon_inode_getfd(). Simplemente devuelva -EFAULT para indicar el error."}], "id": "CVE-2022-48801", "lastModified": "2024-11-21T07:34:06.907", "metrics": {}, "published": "2024-07-16T12:15:04.630", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/202071d2518537866d291aa7cf26af54e674f4d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b7f54894aa7517d2b6c797a499b9f491e9db9083"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c72ea20503610a4a7ba26c769357d31602769c01"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/202071d2518537866d291aa7cf26af54e674f4d4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/b7f54894aa7517d2b6c797a499b9f491e9db9083"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/c72ea20503610a4a7ba26c769357d31602769c01"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: iio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL", "id": "2298137", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2298137"}, "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-253", "details": ["In the Linux kernel, the following vulnerability has been resolved:\niio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL\nIf we fail to copy the just created file descriptor to userland, we\ntry to clean up by putting back 'fd' and freeing 'ib'. The code uses\nput_unused_fd() for the former which is wrong, as the file descriptor\nwas already published by fd_install() which gets called internally by\nanon_inode_getfd().\nThis makes the error handling code leaving a half cleaned up file\ndescriptor table around and a partially destructed 'file' object,\nallowing userland to play use-after-free tricks on us, by abusing\nthe still usable fd and making the code operate on a dangling\n'file->private_data' pointer.\nInstead of leaving the kernel in a partially corrupted state, don't\nattempt to explicitly clean up and leave this to the process exit\npath that'll release any still valid fds, including the one created\nby the previous call to anon_inode_getfd(). Simply return -EFAULT to\nindicate the error."], "name": "CVE-2022-48801", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-48801\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-48801\nhttps://git.kernel.org/stable/c/202071d2518537866d291aa7cf26af54e674f4d4\nhttps://git.kernel.org/stable/c/b7f54894aa7517d2b6c797a499b9f491e9db9083\nhttps://git.kernel.org/stable/c/c72ea20503610a4a7ba26c769357d31602769c01"], "threat_severity": "Low"}

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