UBUNTU-CVE-2021-38166
In kernel/bpf/hashtab.c in the Linux kernel through 5.13.8, there is an integer overflow and out-of-bounds write when many elements are placed in a single bucket. NOTE: exploitation might be impractical without the CAP_SYS_ADMIN capability.
02 / AFFECTED SOFTWARE
Affected packages
23 explicit affected versions
6 explicit affected versions
10 explicit affected versions
44 explicit affected versions
16 explicit affected versions
4 explicit affected versions
38 explicit affected versions
13 explicit affected versions
12 explicit affected versions
33 explicit affected versions
43 explicit affected versions
10 explicit affected versions
50 explicit affected versions
7 explicit affected versions
9 explicit affected versions
5 explicit affected versions
4 explicit affected versions
6 explicit affected versions
7 explicit affected versions
5 explicit affected versions
4 explicit affected versions
6 explicit affected versions
21 explicit affected versions
20 explicit affected versions
3 explicit affected versions
29 explicit affected versions
5 explicit affected versions
5 explicit affected versions
6 explicit affected versions
12 explicit affected versions
4 explicit affected versions
10 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In kernel/bpf/hashtab.c in the Linux kernel through 5.13.8, there is an integer overflow and out-of-bounds write when many elements are placed in a single bucket. NOTE: exploitation might be impractical without the CAP_SYS_ADMIN capability.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=c4eb1f403243fc7bbb7de644db8587c03de36da6
- https://lore.kernel.org/bpf/[email protected]/
- https://ubuntu.com/security/CVE-2021-38166
- https://ubuntu.com/security/notices/USN-5096-1
- https://ubuntu.com/security/notices/USN-5113-1
- https://ubuntu.com/security/notices/USN-5115-1
- https://www.cve.org/CVERecord?id=CVE-2021-38166