CVE-2022-48801

{"id": "CVE-2022-48801", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2024-07-16T12:15:04.630", "references": [{"url": "https://git.kernel.org/stable/c/202071d2518537866d291aa7cf26af54e674f4d4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b7f54894aa7517d2b6c797a499b9f491e9db9083", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c72ea20503610a4a7ba26c769357d31602769c01", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/202071d2518537866d291aa7cf26af54e674f4d4", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/b7f54894aa7517d2b6c797a499b9f491e9db9083", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/c72ea20503610a4a7ba26c769357d31602769c01", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "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."}], "lastModified": "2025-09-24T16:54:07.010", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "61670291-2496-4A61-A6FB-88E2748A3D89", "versionEndExcluding": "5.15.24", "versionStartIncluding": "5.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "679523BA-1392-404B-AB85-F5A5408B1ECC", "versionEndExcluding": "5.16.10", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7BD5F8D9-54FA-4CB0-B4F0-CB0471FDDB2D"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E6E34B23-78B4-4516-9BD8-61B33F4AC49A"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.17:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C030FA3D-03F4-4FB9-9DBF-D08E5CAC51AA"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}