{"id":"CVE-2022-49823","title":"ata: libata-transport: fix error handling in ata_tdev_add()","summary":"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-p…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= d9027470b88631d0956ac37cdadfdeb9cdcf2c99 < ef2ac07ab83163b9a53f45da20e14302591ad9cc","Linux >= d9027470b88631d0956ac37cdadfdeb9cdcf2c99 < f23058dc2398db1d8faca9a2b1ce30b85cdd8b22","Linux >= d9027470b88631d0956ac37cdadfdeb9cdcf2c99 < f54331962883f4fc4bf5e487e6e7cf07c4567fef","Linux >= d9027470b88631d0956ac37cdadfdeb9cdcf2c99 < 1ff36351309e3eadcff297480baf4785e726de9b","Linux 2.6.37"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:49:43.916848Z"},"published":"2025-05-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:00:07.972Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49823","references":[{"url":"https://git.kernel.org/stable/c/ef2ac07ab83163b9a53f45da20e14302591ad9cc"},{"url":"https://git.kernel.org/stable/c/f23058dc2398db1d8faca9a2b1ce30b85cdd8b22"},{"url":"https://git.kernel.org/stable/c/f54331962883f4fc4bf5e487e6e7cf07c4567fef"},{"url":"https://git.kernel.org/stable/c/1ff36351309e3eadcff297480baf4785e726de9b"}],"tags":["cve.org"],"epss":0.00215,"epssPercentile":0.11978,"ingestedAt":"2026-11-05T22:38:31.612Z","slug":"CVE-2022-49823","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= d9027470b88631d0956ac37cdadfdeb9cdcf2c99 < ef2ac07ab83163b9a53f45da20e14302591ad9cc`\n- `Linux >= d9027470b88631d0956ac37cdadfdeb9cdcf2c99 < f23058dc2398db1d8faca9a2b1ce30b85cdd8b22`\n- `Linux >= d9027470b88631d0956ac37cdadfdeb9cdcf2c99 < f54331962883f4fc4bf5e487e6e7cf07c4567fef`\n- `Linux >= d9027470b88631d0956ac37cdadfdeb9cdcf2c99 < 1ff36351309e3eadcff297480baf4785e726de9b`\n- `Linux 2.6.37`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}