UBUNTU-CVE-2021-20317
A flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running OSP.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
6 explicit affected versions
57 explicit affected versions
191 explicit affected versions
74 explicit affected versions
54 explicit affected versions
27 explicit affected versions
86 explicit affected versions
4 explicit affected versions
23 explicit affected versions
71 explicit affected versions
1 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
1 explicit affected versions
29 explicit affected versions
10 explicit affected versions
137 explicit affected versions
70 explicit affected versions
52 explicit affected versions
1 explicit affected versions
29 explicit affected versions
13 explicit affected versions
68 explicit affected versions
1 explicit affected versions
33 explicit affected versions
10 explicit affected versions
53 explicit affected versions
11 explicit affected versions
76 explicit affected versions
2 explicit affected versions
72 explicit affected versions
30 explicit affected versions
1 explicit affected versions
34 explicit affected versions
5 explicit affected versions
30 explicit affected versions
10 explicit affected versions
44 explicit affected versions
16 explicit affected versions
38 explicit affected versions
9 explicit affected versions
114 explicit affected versions
49 explicit affected versions
84 explicit affected versions
61 explicit affected versions
4 explicit affected versions
18 explicit affected versions
52 explicit affected versions
43 explicit affected versions
92 explicit affected versions
101 explicit affected versions
12 explicit affected versions
4 explicit affected versions
1 explicit affected versions
8 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running OSP.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/511885d7061eda3eb1faf3f57dcc936ff75863f1
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d7061eda3eb1faf3f57dcc936ff75863f1
- https://ubuntu.com/security/CVE-2021-20317
- https://ubuntu.com/security/notices/USN-5209-1
- https://ubuntu.com/security/notices/USN-5343-1
- https://www.cve.org/CVERecord?id=CVE-2021-20317