CVE-2021-46905
Medium
Description
In the Linux kernel, the following vulnerability has been resolved: net: hso: fix NULL-deref on disconnect regression Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device unregistration") fixed the racy minor allocation reported by syzbot, but introduced an unconditional NULL-pointer dereference on every disconnect instead. Specifically, the serial device table must no longer be accessed after the minor has been released by hso_serial_tty_unregister().
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedFeb 26, 2024
First seenFeb 26, 2024
How to fix
Update
- linux linux_kernel4.19.189, 5.4.115, 5.10.33, 5.11.17 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 4.19.189, 4.20.0 ≤ v < 5.4.115, 5.5.0 ≤ v < 5.10.33, 5.11.0 ≤ v < 5.11.17, 5.12 | 4.19.189, 5.4.115, 5.10.33, 5.11.17 |
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