UBUNTU-CVE-2021-3739
A NULL pointer dereference flaw was found in the btrfs_rm_device function in fs/btrfs/volumes.c in the Linux Kernel, where triggering the bug requires ‘CAP_SYS_ADMIN’. This flaw allows a local attacker to crash the system or leak kernel internal information. The highest threat from this vulnerability is to system availability.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
5 explicit affected versions
6 explicit affected versions
7 explicit affected versions
33 explicit affected versions
4 explicit affected versions
23 explicit affected versions
1 explicit affected versions
21 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
5 explicit affected versions
1 explicit affected versions
7 explicit affected versions
4 explicit affected versions
36 explicit affected versions
44 explicit affected versions
5 explicit affected versions
36 explicit affected versions
10 explicit affected versions
20 explicit affected versions
1 explicit affected versions
20 explicit affected versions
29 explicit affected versions
13 explicit affected versions
38 explicit affected versions
33 explicit affected versions
10 explicit affected versions
11 explicit affected versions
6 explicit affected versions
7 explicit affected versions
36 explicit affected versions
32 explicit affected versions
1 explicit affected versions
4 explicit affected versions
15 explicit affected versions
1 explicit affected versions
5 explicit affected versions
26 explicit affected versions
1 explicit affected versions
26 explicit affected versions
6 explicit affected versions
1 explicit affected versions
10 explicit affected versions
24 explicit affected versions
44 explicit affected versions
16 explicit affected versions
4 explicit affected versions
20 explicit affected versions
38 explicit affected versions
9 explicit affected versions
26 explicit affected versions
7 explicit affected versions
4 explicit affected versions
26 explicit affected versions
43 explicit affected versions
1 explicit affected versions
12 explicit affected versions
28 explicit affected versions
4 explicit affected versions
15 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A NULL pointer dereference flaw was found in the btrfs_rm_device function in fs/btrfs/volumes.c in the Linux Kernel, where triggering the bug requires ‘CAP_SYS_ADMIN’. This flaw allows a local attacker to crash the system or leak kernel internal information. The highest threat from this vulnerability is to system availability.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091
- https://lore.kernel.org/linux-btrfs/[email protected]/T/#u
- https://ubuntu.com/security/CVE-2021-3739
- https://ubuntu.com/security/notices/USN-5113-1
- https://ubuntu.com/security/notices/USN-5115-1
- https://ubuntu.com/security/notices/USN-5117-1
- https://ubuntu.com/security/notices/USN-5137-1
- https://ubuntu.com/security/notices/USN-5137-2
- https://www.cve.org/CVERecord?id=CVE-2021-3739
- https://www.openwall.com/lists/oss-security/2021/08/25/3