CVE-2022-50412: In the Linux kernel, the following vulnerability has been resolved: drm: bridge: adv7511: unregister cec i2c device after cec adapter cec_unregister_adapter()…

PriorityP339high7.8CVSS 3.1

AVLACLPRLUINSUCHIHAH

EPSS

0.16%

5.8th percentile

In the Linux kernel, the following vulnerability has been resolved: drm: bridge: adv7511: unregister cec i2c device after cec adapter cec_unregister_adapter() assumes that the underlying adapter ops are callable. For example, if the CEC adapter currently has a valid physical address, then the unregistration procedure will invalidate the physical address by setting it to f.f.f.f. Whence the following kernel oops observed after removing the adv7511 module: Unable to handle kernel execution of user memory at virtual address 0000000000000000 Internal error: Oops: 86000004 [#1] PREEMPT_RT SMP Call trace: 0x0 adv7511_cec_adap_log_addr+0x1ac/0x1c8 [adv7511] cec_adap_unconfigure+0x44/0x90 [cec] __cec_s_phys_addr.part.0+0x68/0x230 [cec] __cec_s_phys_addr+0x40/0x50 [cec] cec_unregister_adapter+0xb4/0x118 [cec] adv7511_remove+0x60/0x90 [adv7511] i2c_device_remove+0x34/0xe0 device_release_driver_internal+0x114/0x1f0 driver_detach+0x54/0xe0 bus_remove_driver+0x60/0xd8 driver_unregister+0x34/0x60 i2c_del_driver+0x2c/0x68 adv7511_exit+0x1c/0x67c [adv7511] __arm64_sys_delete_module+0x154/0x288 invoke_syscall+0x48/0x100 el0_svc_common.constprop.0+0x48/0xe8 do_el0_svc+0x28/0x88 el0_svc+0x1c/0x50 el0t_64_sync_handler+0xa8/0xb0 el0t_64_sync+0x15c/0x160 Code: bad PC value ---[ end trace 0000000000000000 ]--- Protect against this scenario by unregistering i2c_cec after unregistering the CEC adapter. Duly disable the CEC clock afterwards too.

Affected

15 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 6.0.3-1 (bookworm)	linux 6.0.3-1 (bookworm)
linux	linux	—	—
linux	linux	>= 3b1b975003e4a3da4b93ab032487a3ae4afca7b5 < 3747465c5da7a11957a34bbb9485d9fc253b91cc	3747465c5da7a11957a34bbb9485d9fc253b91cc
linux	linux	>= 3b1b975003e4a3da4b93ab032487a3ae4afca7b5 < f369fb4deed7ab997cfa703dc85ec08b3adc1af8	f369fb4deed7ab997cfa703dc85ec08b3adc1af8
linux	linux	>= 3b1b975003e4a3da4b93ab032487a3ae4afca7b5 < 4d4d5bc659206b187263190ad9a03513f625659d	4d4d5bc659206b187263190ad9a03513f625659d
linux	linux	>= 3b1b975003e4a3da4b93ab032487a3ae4afca7b5 < 86ae5170786aea3e1751123ca55700fb9b37b623	86ae5170786aea3e1751123ca55700fb9b37b623
linux	linux	>= 3b1b975003e4a3da4b93ab032487a3ae4afca7b5 < 40cdb02cb9f965732eb543d47f15bef8d10f0f5f	40cdb02cb9f965732eb543d47f15bef8d10f0f5f
linux	linux_kernel	>= 0 < 5.10.234-1	5.10.234-1
linux	linux_kernel	>= 0 < 6.0.3-1	6.0.3-1
linux	linux_kernel	>= 0 < 6.0.3-1	6.0.3-1
linux	linux_kernel	>= 0 < 6.0.3-1	6.0.3-1
linux	linux_kernel	>= 4.15 < 5.10.234	5.10.234
linux	linux_kernel	>= 5.11 < 5.15.75	5.15.75
linux	linux_kernel	>= 5.16 < 5.19.17	5.19.17
linux	linux_kernel	>= 6.0 < 6.0.3	6.0.3

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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