CVE-2020-28941

 

Published at: - 19-11-2020 08:15

Last modified: - 26-10-2022 01:44

Total changes: - 4

Description

An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the Linux kernel through 5.9.9. Local attackers on systems with the speakup driver could cause a local denial of service attack, aka CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• [oss-security] 20201119 Re: Linux kernel NULL-ptr deref bug in spk_ttyio_ldisc_close-Mailing List, Patch, Third Party Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?h=tty-linus&id=d4122754442799187d5d537a9c039a49a67e57f1
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4122754442799187d5d537a9c039a49a67e57f1
• https://www.openwall.com/lists/oss-security/2020/11/19/3
• https://github.com/torvalds/linux/commit/d4122754442799187d5d537a9c039a49a67e57f1
• FEDORA-2020-4700a73bd5-Third Party Advisory
• FEDORA-2020-8c15928d23-Third Party Advisory
• [debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2020-28941

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures