Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 5.9.9 |
| Fedoraproject | Fedora | 32 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2020/11/19/5Mailing ListPatchThird Party Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4122PatchVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?h=tty-linPatchVendor Advisory
- https://github.com/torvalds/linux/commit/d4122754442799187d5d537a9c039a49a67e57fPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.openwall.com/lists/oss-security/2020/11/19/3Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/11/19/5Mailing ListPatchThird Party Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4122PatchVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?h=tty-linPatchVendor Advisory
- https://github.com/torvalds/linux/commit/d4122754442799187d5d537a9c039a49a67e57fPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2020-28941?
CVE-2020-28941 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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,...
How severe is CVE-2020-28941?
CVE-2020-28941 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-28941?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Fedoraproject Fedora, Debian Debian Linux.