UBUNTU-CVE-2021-33624
In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
4 explicit affected versions
6 explicit affected versions
5 explicit affected versions
31 explicit affected versions
85 explicit affected versions
118 explicit affected versions
4 explicit affected versions
121 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
21 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
111 explicit affected versions
4 explicit affected versions
1 explicit affected versions
33 explicit affected versions
42 explicit affected versions
4 explicit affected versions
33 explicit affected versions
120 explicit affected versions
10 explicit affected versions
18 explicit affected versions
1 explicit affected versions
20 explicit affected versions
144 explicit affected versions
1 explicit affected versions
29 explicit affected versions
13 explicit affected versions
1 explicit affected versions
36 explicit affected versions
33 explicit affected versions
10 explicit affected versions
188 explicit affected versions
11 explicit affected versions
5 explicit affected versions
7 explicit affected versions
34 explicit affected versions
138 explicit affected versions
2 explicit affected versions
132 explicit affected versions
165 explicit affected versions
154 explicit affected versions
30 explicit affected versions
139 explicit affected versions
116 explicit affected versions
93 explicit affected versions
1 explicit affected versions
2 explicit affected versions
13 explicit affected versions
92 explicit affected versions
1 explicit affected versions
1 explicit affected versions
98 explicit affected versions
5 explicit affected versions
23 explicit affected versions
1 explicit affected versions
24 explicit affected versions
4 explicit affected versions
1 explicit affected versions
140 explicit affected versions
94 explicit affected versions
10 explicit affected versions
22 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
18 explicit affected versions
38 explicit affected versions
167 explicit affected versions
9 explicit affected versions
24 explicit affected versions
97 explicit affected versions
5 explicit affected versions
121 explicit affected versions
4 explicit affected versions
23 explicit affected versions
43 explicit affected versions
1 explicit affected versions
12 explicit affected versions
26 explicit affected versions
4 explicit affected versions
13 explicit affected versions
1 explicit affected versions
69 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=9183671af6dbf60a1219371d4ed73e23f43b49db
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=973377ffe8148180b2651825b92ae91988141b05
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=d203b0fd863a2261e5d00b97f3d060c4c2a6db71
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=fe9a5ca7e370e613a9a75a13008a3845ea759d6e
- https://ubuntu.com/security/CVE-2021-33624
- https://ubuntu.com/security/notices/USN-5091-1
- https://ubuntu.com/security/notices/USN-5091-2
- https://ubuntu.com/security/notices/USN-5092-1
- https://ubuntu.com/security/notices/USN-5092-2
- https://ubuntu.com/security/notices/USN-5115-1
- https://www.cve.org/CVERecord?id=CVE-2021-33624
- https://www.openwall.com/lists/oss-security/2021/06/21/1