UBUNTU-CVE-2019-19039
__btrfs_free_extent in fs/btrfs/extent-tree.c in the Linux kernel through 5.3.12 calls btrfs_print_leaf in a certain ENOENT case, which allows local users to obtain potentially sensitive information about register values via the dmesg program. NOTE: The BTRFS development team disputes this issues as not being a vulnerability because “1) The kernel provide facilities to restrict access to dmesg - dmesg_restrict=1 sysctl option. So it's really up to the system administrator to judge whether dmesg access shall be disallowed or not. 2) WARN/WARN_ON are widely used macros in the linux kernel. If this CVE is considered valid this would mean there are literally thousands CVE lurking in the kernel - something which clearly is not the case.
02 / AFFECTED SOFTWARE
Affected packages
40 explicit affected versions
6 explicit affected versions
6 explicit affected versions
57 explicit affected versions
191 explicit affected versions
45 explicit affected versions
8 explicit affected versions
26 explicit affected versions
1 explicit affected versions
51 explicit affected versions
121 explicit affected versions
23 explicit affected versions
1 explicit affected versions
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7 explicit affected versions
1 explicit affected versions
1 explicit affected versions
7 explicit affected versions
10 explicit affected versions
7 explicit affected versions
120 explicit affected versions
3 explicit affected versions
10 explicit affected versions
26 explicit affected versions
25 explicit affected versions
144 explicit affected versions
2 explicit affected versions
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6 explicit affected versions
42 explicit affected versions
1 explicit affected versions
8 explicit affected versions
22 explicit affected versions
23 explicit affected versions
2 explicit affected versions
188 explicit affected versions
11 explicit affected versions
7 explicit affected versions
2 explicit affected versions
45 explicit affected versions
165 explicit affected versions
50 explicit affected versions
51 explicit affected versions
3 explicit affected versions
58 explicit affected versions
1 explicit affected versions
4 explicit affected versions
3 explicit affected versions
28 explicit affected versions
44 explicit affected versions
10 explicit affected versions
26 explicit affected versions
6 explicit affected versions
38 explicit affected versions
4 explicit affected versions
72 explicit affected versions
97 explicit affected versions
35 explicit affected versions
27 explicit affected versions
12 explicit affected versions
2 explicit affected versions
4 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
__btrfs_free_extent in fs/btrfs/extent-tree.c in the Linux kernel through 5.3.12 calls btrfs_print_leaf in a certain ENOENT case, which allows local users to obtain potentially sensitive information about register values via the dmesg program. NOTE: The BTRFS development team disputes this issues as not being a vulnerability because “1) The kernel provide facilities to restrict access to dmesg - dmesg_restrict=1 sysctl option. So it's really up to the system administrator to judge whether dmesg access shall be disallowed or not. 2) WARN/WARN_ON are widely used macros in the linux kernel. If this CVE is considered valid this would mean there are literally thousands CVE lurking in the kernel - something which clearly is not the case.
05 / REFERENCES