Use-After-Free Vulnerability in Linux Kernel's TTY Subsystem Affecting Multiple Versions
CVE-2020-29661

7.8HIGH

Key Information:

Vendor

Linux
Status
Linux Kernel
Vendor
CVE Published:
9 December 2020

Badges

👾 Exploit Exists

What is CVE-2020-29661?

A locking issue was identified in the tty subsystem of the Linux kernel which could be exploited through a use-after-free attack related to the TIOCSPGRP function. This vulnerability may allow an attacker to escalate privileges or execute arbitrary code in the kernel space, potentially compromising system security. Users are advised to update their systems to the latest kernel versions to mitigate this security risk.

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/...
x_refsource_MISC
http://www.openwall.com/lists/oss-security/2020/12/10/1
mailing-listx_refsource_MLIST
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisoryx_refsource_FEDORA

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.