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. CREATE(Triage):(User=admin) CVE-2020-28941 (https://nvd.nist.gov/vuln/detail/CVE-2020-28941)
