UBUNTU-CVE-2020-25212
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.
02 / AFFECTED SOFTWARE
Affected packages
84 explicit affected versions
45 explicit affected versions
6 explicit affected versions
6 explicit affected versions
191 explicit affected versions
50 explicit affected versions
14 explicit affected versions
31 explicit affected versions
5 explicit affected versions
57 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
1 explicit affected versions
7 explicit affected versions
7 explicit affected versions
1 explicit affected versions
14 explicit affected versions
18 explicit affected versions
52 explicit affected versions
14 explicit affected versions
7 explicit affected versions
10 explicit affected versions
30 explicit affected versions
51 explicit affected versions
29 explicit affected versions
1 explicit affected versions
1 explicit affected versions
22 explicit affected versions
13 explicit affected versions
47 explicit affected versions
1 explicit affected versions
16 explicit affected versions
26 explicit affected versions
10 explicit affected versions
11 explicit affected versions
86 explicit affected versions
14 explicit affected versions
2 explicit affected versions
50 explicit affected versions
6 explicit affected versions
54 explicit affected versions
1 explicit affected versions
115 explicit affected versions
8 explicit affected versions
63 explicit affected versions
1 explicit affected versions
9 explicit affected versions
4 explicit affected versions
1 explicit affected versions
4 explicit affected versions
1 explicit affected versions
8 explicit affected versions
73 explicit affected versions
4 explicit affected versions
32 explicit affected versions
44 explicit affected versions
16 explicit affected versions
38 explicit affected versions
9 explicit affected versions
93 explicit affected versions
4 explicit affected versions
76 explicit affected versions
28 explicit affected versions
40 explicit affected versions
4 explicit affected versions
43 explicit affected versions
1 explicit affected versions
12 explicit affected versions
8 explicit affected versions
4 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.
05 / REFERENCES
Further evidence
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.3
- https://git.kernel.org/linus/b4487b93545214a9db8cbf32e86411677b0cca21
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21
- https://twitter.com/grsecurity/status/1303370421958578179
- https://ubuntu.com/security/CVE-2020-25212
- https://ubuntu.com/security/notices/USN-4525-1
- https://ubuntu.com/security/notices/USN-4527-1
- https://ubuntu.com/security/notices/USN-4578-1
- https://ubuntu.com/security/notices/USN-4752-1
- https://www.cve.org/CVERecord?id=CVE-2020-25212