CVE-2023-52439High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: uio: Fix use-after-free in uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() devi…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
In the Linux kernel, the following vulnerability has been resolved:
uio: Fix use-after-free in uio_open
In the core-1 uio_unregister_device(), the device_unregister will kfree idev when the idev->dev kobject ref is 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then:
To address this issue, we can get idev atomic & inc idev reference with minor_lock.
linux_kernel > 4.18.0, < 4.19.306linux_kernel >= 4.20.0, < 5.4.268linux_kernel >= 5.5.0, < 5.10.209linux_kernel >= 5.11.0, < 5.15.148linux_kernel >= 5.16.0, < 6.1.74linux_kernel >= 6.2.0, < 6.6.13linux_kernel >= 6.7.0, < 6.7.1linux_kernel = 4.18Upgrade past the affected range:
linux_kernel 6.7.1Connected by shared product, vendor, weakness, or advisory.
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