UBUNTU-CVE-2020-29568
An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable.
02 / AFFECTED SOFTWARE
Affected packages
89 explicit affected versions
50 explicit affected versions
6 explicit affected versions
6 explicit affected versions
57 explicit affected versions
191 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
57 explicit affected versions
21 explicit affected versions
13 explicit affected versions
10 explicit affected versions
36 explicit affected versions
7 explicit affected versions
56 explicit affected versions
35 explicit affected versions
1 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
91 explicit affected versions
22 explicit affected versions
2 explicit affected versions
55 explicit affected versions
18 explicit affected versions
60 explicit affected versions
1 explicit affected versions
122 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
78 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
100 explicit affected versions
12 explicit affected versions
84 explicit affected versions
35 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 Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable.
05 / REFERENCES
Further evidence
- https://ubuntu.com/security/CVE-2020-29568
- https://ubuntu.com/security/notices/USN-4748-1
- 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-2020-29568
- https://xenbits.xen.org/xsa/advisory-349.html