UBUNTU-CVE-2021-20239
A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
6 explicit affected versions
21 explicit affected versions
23 explicit affected versions
1 explicit affected versions
15 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
1 explicit affected versions
23 explicit affected versions
31 explicit affected versions
22 explicit affected versions
10 explicit affected versions
8 explicit affected versions
1 explicit affected versions
23 explicit affected versions
13 explicit affected versions
25 explicit affected versions
33 explicit affected versions
10 explicit affected versions
11 explicit affected versions
23 explicit affected versions
19 explicit affected versions
1 explicit affected versions
3 explicit affected versions
13 explicit affected versions
1 explicit affected versions
13 explicit affected versions
1 explicit affected versions
6 explicit affected versions
12 explicit affected versions
44 explicit affected versions
16 explicit affected versions
8 explicit affected versions
38 explicit affected versions
9 explicit affected versions
13 explicit affected versions
12 explicit affected versions
43 explicit affected versions
1 explicit affected versions
12 explicit affected versions
16 explicit affected versions
4 explicit affected versions
3 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.
05 / REFERENCES
Further evidence
- https://gist.github.com/Ga-ryo/2ec958e78f55c5d18558960f3fe1c6ec
- https://ubuntu.com/security/CVE-2021-20239
- https://ubuntu.com/security/notices/USN-4878-1
- https://ubuntu.com/security/notices/USN-4910-1
- https://www.cve.org/CVERecord?id=CVE-2021-20239
- https://www.zerodayinitiative.com/advisories/ZDI-21-100/