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 o…
Impact
__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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | through 5.3.12 |
| Debian | Debian Linux | Version 9.0 |
| Canonical | Ubuntu Linux | Versions 14.04, 16.04, 18.04 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19039
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
- https://usn.ubuntu.com/4414-1/
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19039
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
- https://usn.ubuntu.com/4414-1/