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.

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Source ID Title
Debian DLA Debian DLA DLA-2483-1 linux-4.19 security update
EUVD EUVD EUVD-2020-21329 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.
Ubuntu USN Ubuntu USN USN-4749-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-4750-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-4751-1 Linux kernel vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 29 May 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-29T16:06:53.239Z

Reserved: 2020-11-19T00:00:00.000Z

Link: CVE-2020-28941

cve-icon Vulnrichment

Updated: 2024-08-04T16:48:00.475Z

cve-icon NVD

Status : Modified

Published: 2020-11-19T19:15:11.797

Modified: 2026-05-29T18:16:27.177

Link: CVE-2020-28941

cve-icon Redhat

Severity :

Publid Date: 2020-11-19T00:00:00Z

Links: CVE-2020-28941 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses