UBUNTU-CVE-2021-45402
The check_alu_op() function in kernel/bpf/verifier.c in the Linux kernel through v5.16-rc5 did not properly update bounds while handling the mov32 instruction, which allows local users to obtain potentially sensitive address information, aka a "pointer leak."
02 / AFFECTED SOFTWARE
Affected packages
29 explicit affected versions
8 explicit affected versions
7 explicit affected versions
4 explicit affected versions
26 explicit affected versions
5 explicit affected versions
5 explicit affected versions
4 explicit affected versions
7 explicit affected versions
33 explicit affected versions
5 explicit affected versions
38 explicit affected versions
13 explicit affected versions
6 explicit affected versions
10 explicit affected versions
10 explicit affected versions
10 explicit affected versions
21 explicit affected versions
6 explicit affected versions
13 explicit affected versions
12 explicit affected versions
23 explicit affected versions
5 explicit affected versions
12 explicit affected versions
44 explicit affected versions
4 explicit affected versions
9 explicit affected versions
12 explicit affected versions
13 explicit affected versions
7 explicit affected versions
16 explicit affected versions
43 explicit affected versions
9 explicit affected versions
5 explicit affected versions
12 explicit affected versions
12 explicit affected versions
50 explicit affected versions
12 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
The check_alu_op() function in kernel/bpf/verifier.c in the Linux kernel through v5.16-rc5 did not properly update bounds while handling the mov32 instruction, which allows local users to obtain potentially sensitive address information, aka a "pointer leak."
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/3cf2b61eb06765e27fec6799292d9fb46d0b7e60
- https://git.kernel.org/linus/b1a7288dedc6caf9023f2676b4f5ed34cf0d4029
- https://git.kernel.org/linus/e572ff80f05c33cd0cb4860f864f5c9c044280b6
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=3cf2b61eb06765e27fec6799292d9fb46d0b7e60
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b1a7288dedc6caf9023f2676b4f5ed34cf0d4029
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=e572ff80f05c33cd0cb4860f864f5c9c044280b6
- https://ubuntu.com/security/CVE-2021-45402
- https://ubuntu.com/security/notices/USN-5337-1
- https://ubuntu.com/security/notices/USN-5368-1
- https://www.cve.org/CVERecord?id=CVE-2021-45402