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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities
NOTICE UPDATED - April, 25th 2024

NIST has updated the NVD program announcement page with additional information regarding recent concerns and the temporary delays in enrichment efforts.

CVE-2021-46905 Detail

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().


Severity

 


CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  5.5 MEDIUM
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/stable/c/0c71d4c89559f72cec2592d078681a843bce570e Patch 
https://git.kernel.org/stable/c/0f000005da31f6947f843ce6b3e3a960540c6e00 Patch 
https://git.kernel.org/stable/c/24b699bea7553fc0b98dad9d864befb6005ac7f1 Patch 
https://git.kernel.org/stable/c/2ad5692db72874f02b9ad551d26345437ea4f7f3 Patch 
https://git.kernel.org/stable/c/41c44e1f3112d7265dae522c026399b2a42d19ef Patch 
https://git.kernel.org/stable/c/5871761c5f0f20d6e98bf3b6bd7486d857589554 Patch 
https://git.kernel.org/stable/c/5c17cfe155d21954b4c7e2a78fa771cebcd86725 Patch 
https://git.kernel.org/stable/c/90642ee9eb581a13569b1c0bd57e85d962215273 Patch 
https://git.kernel.org/stable/c/d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53e Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference cwe source acceptance level NIST  

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-46905
NVD Published Date:
02/26/2024
NVD Last Modified:
04/17/2024
Source:
kernel.org