CVE-2023-52617

2024-03-1800:00:00

ubuntu.com

linux kernel

vulnerability

cve-2023-52617

pci

hot removal

fix

stdev_release

switchtec

dma mode

AI Score

7.6

Confidence

High

EPSS

Percentile

10.3%

JSON

In the Linux kernel, the following vulnerability has been resolved: PCI:
switchtec: Fix stdev_release() crash after surprise hot remove A PCI device
hot removal may occur while stdev->cdev is held open. The call to
stdev_release() then happens during close or exit, at a point way past
switchtec_pci_remove(). Otherwise the last ref would vanish with the
trailing put_device(), just before return. At that later point in time, the
devm cleanup has already removed the stdev->mmio_mrpc mapping. Also, the
stdev->pdev reference was not a counted one. Therefore, in DMA mode, the
iowrite32() in stdev_release() will cause a fatal page fault, and the
subsequent dma_free_coherent(), if reached, would pass a stale
&stdev->pdev->dev pointer. Fix by moving MRPC DMA shutdown into
switchtec_pci_remove(), after stdev_kill(). Counting the stdev->pdev ref is
now optional, but may prevent future accidents. Reproducible via the script
at https://lore.kernel.org/r/[email protected]

Notes

Author	Note
rodrigo-zaiden	USN-6765-1 for linux-oem-6.5 wrongly stated that this CVE was fixed in version 6.5.0-1022.23. The mentioned notice was revoked and the state of the fix for linux-oem-6.5 was recovered to the previous state.

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< 5.4.0-181.201UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-106.116UNKNOWN
ubuntu23.10noarchlinux< 6.5.0-41.41UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1124.134UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1061.67UNKNOWN
ubuntu23.10noarchlinux-aws< 6.5.0-1021.21UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1061.67~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1124.134~18.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.5< anyUNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1129.136UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux	< 5.4.0-181.201	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-106.116	UNKNOWN
ubuntu	23.10	noarch	linux	< 6.5.0-41.41	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1124.134	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1061.67	UNKNOWN
ubuntu	23.10	noarch	linux-aws	< 6.5.0-1021.21	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1061.67~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1124.134~18.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.5	< any	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1129.136	UNKNOWN