CVE-2020-28941
- State
- Published
- Severity
- 5.5 Medium
- Published
- Nov 19, 2020
- Updated
- May 29, 2026
- Reserved
- Nov 19, 2020
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
Weaknesses
- CWE-763 Release of Invalid Pointer or Reference
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
- https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?h=tty-linus&id=d4122754442799187d5d537a9c039a49a67e57f1
- https://www.openwall.com/lists/oss-security/2020/11/19/3
- https://github.com/torvalds/linux/commit/d4122754442799187d5d537a9c039a49a67e57f1
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4122754442799187d5d537a9c039a49a67e57f1
- [oss-security] 20201119 Re: Linux kernel NULL-ptr deref bug in spk_ttyio_ldisc_closemailing-list
- FEDORA-2020-4700a73bd5vendor-advisory
- FEDORA-2020-8c15928d23vendor-advisory
- [debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security updatemailing-list
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