Vulnerability 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().
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 4.19.189 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0c71d4c89559f72cec2592d078681a843bce570ePatch
- https://git.kernel.org/stable/c/0f000005da31f6947f843ce6b3e3a960540c6e00Patch
- https://git.kernel.org/stable/c/24b699bea7553fc0b98dad9d864befb6005ac7f1Patch
- https://git.kernel.org/stable/c/2ad5692db72874f02b9ad551d26345437ea4f7f3Patch
- https://git.kernel.org/stable/c/41c44e1f3112d7265dae522c026399b2a42d19efPatch
- https://git.kernel.org/stable/c/5871761c5f0f20d6e98bf3b6bd7486d857589554Patch
- https://git.kernel.org/stable/c/5c17cfe155d21954b4c7e2a78fa771cebcd86725Patch
- https://git.kernel.org/stable/c/90642ee9eb581a13569b1c0bd57e85d962215273Patch
- https://git.kernel.org/stable/c/d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53ePatch
- https://git.kernel.org/stable/c/0c71d4c89559f72cec2592d078681a843bce570ePatch
- https://git.kernel.org/stable/c/0f000005da31f6947f843ce6b3e3a960540c6e00Patch
- https://git.kernel.org/stable/c/24b699bea7553fc0b98dad9d864befb6005ac7f1Patch
- https://git.kernel.org/stable/c/2ad5692db72874f02b9ad551d26345437ea4f7f3Patch
- https://git.kernel.org/stable/c/41c44e1f3112d7265dae522c026399b2a42d19efPatch
- https://git.kernel.org/stable/c/5871761c5f0f20d6e98bf3b6bd7486d857589554Patch
FAQ
What is CVE-2021-46905?
CVE-2021-46905 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 unregistrat...
How severe is CVE-2021-46905?
CVE-2021-46905 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-46905?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.