cbcvebase.
CVE-2021-47549
published 2024-05-24

CVE-2021-47549: In the Linux kernel, the following vulnerability has been resolved: sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl When the `rmmod sata_fsl.ko`…

PriorityP339high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.24%
14.6th percentile
In the Linux kernel, the following vulnerability has been resolved: sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl When the `rmmod sata_fsl.ko` command is executed in the PPC64 GNU/Linux, a bug is reported: BUG: Unable to handle kernel data access on read at 0x80000800805b502c Oops: Kernel access of bad area, sig: 11 [#1] NIP [c0000000000388a4] .ioread32+0x4/0x20 LR [80000000000c6034] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl] Call Trace: .free_irq+0x1c/0x4e0 (unreliable) .ata_host_stop+0x74/0xd0 [libata] .release_nodes+0x330/0x3f0 .device_release_driver_internal+0x178/0x2c0 .driver_detach+0x64/0xd0 .bus_remove_driver+0x70/0xf0 .driver_unregister+0x38/0x80 .platform_driver_unregister+0x14/0x30 .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl] .__se_sys_delete_module+0x1ec/0x2d0 .system_call_exception+0xfc/0x1f0 system_call_common+0xf8/0x200 The triggering of the BUG is shown in the following stack: driver_detach device_release_driver_internal __device_release_driver drv->remove(dev) --> platform_drv_remove/platform_remove drv->remove(dev) --> sata_fsl_remove iounmap(host_priv->hcr_base); node.release(dev, dr->data) --> ata_host_stop ap->ops->port_stop(ap) --> sata_fsl_port_stop ioread32(hcr_base + HCONTROL) ops->host_stop(host) The iounmap(host_priv->hcr_base) and kfree(host_priv) functions should not be executed in drv->remove. These functions should be executed in host_stop after port_stop. Therefore, we move these functions to the new function sata_fsl_host_stop and bind the new function to host_stop.

Affected

22 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.15.15-1 (bookworm)linux 5.15.15-1 (bookworm)
linuxlinux——
linuxlinux>= faf0b2e5afe7dae072d2715763c7f992b612b628 < cdcd80292106df5cda325426e96495503e41f947cdcd80292106df5cda325426e96495503e41f947
linuxlinux>= faf0b2e5afe7dae072d2715763c7f992b612b628 < 91ba94d3f7afca195b224f77a72044fbde1389ce91ba94d3f7afca195b224f77a72044fbde1389ce
linuxlinux>= faf0b2e5afe7dae072d2715763c7f992b612b628 < 325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1
linuxlinux>= faf0b2e5afe7dae072d2715763c7f992b612b628 < 0769449b0a5eabc3545337217ae690e46673e73a0769449b0a5eabc3545337217ae690e46673e73a
linuxlinux>= faf0b2e5afe7dae072d2715763c7f992b612b628 < 77393806c76b6b44f1c44bd957788c8bd9152c4577393806c76b6b44f1c44bd957788c8bd9152c45
linuxlinux>= faf0b2e5afe7dae072d2715763c7f992b612b628 < 4a46b2f5dce02539e88a300800812bd24a45e0974a46b2f5dce02539e88a300800812bd24a45e097
linuxlinux>= faf0b2e5afe7dae072d2715763c7f992b612b628 < adf098e2a8a1e1fc075d6a5ba2edd13cf7189082adf098e2a8a1e1fc075d6a5ba2edd13cf7189082
linuxlinux>= faf0b2e5afe7dae072d2715763c7f992b612b628 < 6c8ad7e8cf29eb55836e7a0215f967746ab2b5046c8ad7e8cf29eb55836e7a0215f967746ab2b504
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.84-15.10.84-1
linuxlinux_kernel>= 0 < 5.15.15-15.15.15-1
linuxlinux_kernel>= 0 < 5.15.15-15.15.15-1
linuxlinux_kernel>= 0 < 5.15.15-15.15.15-1
linuxlinux_kernel>= 2.6.24 < 4.4.2944.4.294
linuxlinux_kernel>= 4.10 < 4.14.2574.14.257
linuxlinux_kernel>= 4.15 < 4.19.2204.19.220
linuxlinux_kernel>= 4.20 < 5.4.1645.4.164
linuxlinux_kernel>= 4.5 < 4.9.2924.9.292
linuxlinux_kernel>= 5.11 < 5.15.75.15.7
linuxlinux_kernel>= 5.5 < 5.10.845.10.84

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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