CVE - CVE-2022-49826

CVE-ID
CVE-2022-49826	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: ata: libata-transport: fix double ata_host_put() in ata_tport_add() In the error path in ata_tport_add(), when calling put_device(), ata_tport_release() is called, it will put the refcount of 'ap->host'. And then ata_host_put() is called again, the refcount is decreased to 0, ata_host_release() is called, all ports are freed and set to null. When unbinding the device after failure, ata_host_stop() is called to release the resources, it leads a null-ptr-deref(), because all the ports all freed and null. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 CPU: 7 PID: 18671 Comm: modprobe Kdump: loaded Tainted: G E 6.1.0-rc3+ #8 pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ata_host_stop+0x3c/0x84 [libata] lr : release_nodes+0x64/0xd0 Call trace: ata_host_stop+0x3c/0x84 [libata] release_nodes+0x64/0xd0 devres_release_all+0xbc/0x1b0 device_unbind_cleanup+0x20/0x70 really_probe+0x158/0x320 __driver_probe_device+0x84/0x120 driver_probe_device+0x44/0x120 __driver_attach+0xb4/0x220 bus_for_each_dev+0x78/0xdc driver_attach+0x2c/0x40 bus_add_driver+0x184/0x240 driver_register+0x80/0x13c __pci_register_driver+0x4c/0x60 ahci_pci_driver_init+0x30/0x1000 [ahci] Fix this by removing redundant ata_host_put() in the error path.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/30e12e2be27ac6c4be2af4163c70db381364706f URL:https://git.kernel.org/stable/c/30e12e2be27ac6c4be2af4163c70db381364706f MISC:https://git.kernel.org/stable/c/377ff82c33c0cb74562a353361b64b33c09562cf URL:https://git.kernel.org/stable/c/377ff82c33c0cb74562a353361b64b33c09562cf MISC:https://git.kernel.org/stable/c/865a6da40ba092c18292ae5f6194756131293745 URL:https://git.kernel.org/stable/c/865a6da40ba092c18292ae5f6194756131293745 MISC:https://git.kernel.org/stable/c/8c76310740807ade5ecdab5888f70ecb6d35732e URL:https://git.kernel.org/stable/c/8c76310740807ade5ecdab5888f70ecb6d35732e MISC:https://git.kernel.org/stable/c/ac471468f7c16cda2525909946ca13ddbcd14000 URL:https://git.kernel.org/stable/c/ac471468f7c16cda2525909946ca13ddbcd14000 MISC:https://git.kernel.org/stable/c/bec9ded5404cb14e5f5470103d0973a2ff83d6a5 URL:https://git.kernel.org/stable/c/bec9ded5404cb14e5f5470103d0973a2ff83d6a5
Assigning CNA
kernel.org
Date Record Created
20250501	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250501)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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