UBUNTU-CVE-2020-28941
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.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
6 explicit affected versions
57 explicit affected versions
20 explicit affected versions
38 explicit affected versions
11 explicit affected versions
68 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
12 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
1 explicit affected versions
22 explicit affected versions
30 explicit affected versions
21 explicit affected versions
13 explicit affected versions
10 explicit affected versions
36 explicit affected versions
7 explicit affected versions
35 explicit affected versions
1 explicit affected versions
1 explicit affected versions
29 explicit affected versions
13 explicit affected versions
52 explicit affected versions
1 explicit affected versions
24 explicit affected versions
32 explicit affected versions
10 explicit affected versions
11 explicit affected versions
22 explicit affected versions
55 explicit affected versions
18 explicit affected versions
60 explicit affected versions
1 explicit affected versions
2 explicit affected versions
14 explicit affected versions
68 explicit affected versions
1 explicit affected versions
17 explicit affected versions
12 explicit affected versions
1 explicit affected versions
12 explicit affected versions
1 explicit affected versions
14 explicit affected versions
3 explicit affected versions
11 explicit affected versions
37 explicit affected versions
44 explicit affected versions
16 explicit affected versions
7 explicit affected versions
38 explicit affected versions
9 explicit affected versions
12 explicit affected versions
84 explicit affected versions
45 explicit affected versions
6 explicit affected versions
11 explicit affected versions
43 explicit affected versions
1 explicit affected versions
12 explicit affected versions
15 explicit affected versions
4 explicit affected versions
2 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- http://www.openwall.com/lists/oss-security/2020/11/19/5
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4122754442799187d5d537a9c039a49a67e57f1
- https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?h=tty-linus&id=d4122754442799187d5d537a9c039a49a67e57f1
- https://github.com/torvalds/linux/commit/d4122754442799187d5d537a9c039a49a67e57f1
- https://ubuntu.com/security/CVE-2020-28941
- https://ubuntu.com/security/notices/USN-4749-1
- https://ubuntu.com/security/notices/USN-4750-1
- https://ubuntu.com/security/notices/USN-4751-1
- https://www.cve.org/CVERecord?id=CVE-2020-28941
- https://www.openwall.com/lists/oss-security/2020/11/19/3