{"id":"CVE-2022-49823","summary":"ata: libata-transport: fix error handling in ata_tdev_add()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nata: libata-transport: fix error handling in ata_tdev_add()\n\nIn ata_tdev_add(), the return value of transport_add_device() is\nnot checked. As a result, it causes null-ptr-deref while removing\nthe module, because transport_remove_device() is called to remove\nthe device that was not added.\n\nUnable to handle kernel NULL pointer dereference at virtual address 00000000000000d0\nCPU: 13 PID: 13603 Comm: rmmod Kdump: loaded Tainted: G        W          6.1.0-rc3+ #36\npstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : device_del+0x48/0x3a0\nlr : device_del+0x44/0x3a0\nCall trace:\n device_del+0x48/0x3a0\n attribute_container_class_device_del+0x28/0x40\n transport_remove_classdev+0x60/0x7c\n attribute_container_device_trigger+0x118/0x120\n transport_remove_device+0x20/0x30\n ata_tdev_delete+0x24/0x50 [libata]\n ata_tlink_delete+0x40/0xa0 [libata]\n ata_tport_delete+0x2c/0x60 [libata]\n ata_port_detach+0x148/0x1b0 [libata]\n ata_pci_remove_one+0x50/0x80 [libata]\n ahci_remove_one+0x4c/0x8c [ahci]\n\nFix this by checking and handling return value of transport_add_device()\nin ata_tdev_add(). In the error path, device_del() is called to delete\nthe device which was added earlier in this function, and ata_tdev_free()\nis called to free ata_dev.","modified":"2026-04-03T13:14:31.125805743Z","published":"2025-05-01T14:09:44.205Z","related":["SUSE-SU-2025:01918-1","SUSE-SU-2025:01966-1","SUSE-SU-2025:01982-1","SUSE-SU-2025:01995-1","SUSE-SU-2025:02173-1","SUSE-SU-2025:02262-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49823.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1ff36351309e3eadcff297480baf4785e726de9b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ef2ac07ab83163b9a53f45da20e14302591ad9cc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f23058dc2398db1d8faca9a2b1ce30b85cdd8b22"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f54331962883f4fc4bf5e487e6e7cf07c4567fef"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49823.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49823"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d9027470b88631d0956ac37cdadfdeb9cdcf2c99"},{"fixed":"ef2ac07ab83163b9a53f45da20e14302591ad9cc"},{"fixed":"f23058dc2398db1d8faca9a2b1ce30b85cdd8b22"},{"fixed":"f54331962883f4fc4bf5e487e6e7cf07c4567fef"},{"fixed":"1ff36351309e3eadcff297480baf4785e726de9b"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49823.json"}}],"schema_version":"1.7.5"}