An issue was discovered in the Linux kernel through 4.17.10. There is an invalid pointer dereference in btrfs_root_node() when mounting a crafted btrfs image, because of a lack of chunk block group mapping validation in btrfs_read_block_groups in fs/btrfs/extent-tree.c, and a lack of empty-tree checks in check_leaf in fs/btrfs/tree-checker.c.
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
|Base Score:||5.5||Base Metrics:||AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H|
|Access Vector:||Local network||Attack Complexity:||Low|
|Privileges Required:||None||User Interaction:||Required|
|Integrity Impact:||None||Availability Impact:||High|
|Oracle Linux version 7 (kernel-uek)||ELSA-2019-4570||2019-03-12|
This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team