CVE-2024-47757

high

Description

In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential oob read in nilfs_btree_check_delete() The function nilfs_btree_check_delete(), which checks whether degeneration to direct mapping occurs before deleting a b-tree entry, causes memory access outside the block buffer when retrieving the maximum key if the root node has no entries. This does not usually happen because b-tree mappings with 0 child nodes are never created by mkfs.nilfs2 or nilfs2 itself. However, it can happen if the b-tree root node read from a device is configured that way, so fix this potential issue by adding a check for that case.

References

https://git.kernel.org/stable/c/f9c96351aa6718b42a9f42eaf7adce0356bdb5e8

https://git.kernel.org/stable/c/f3a9859767c7aea758976f5523903d247e585129

https://git.kernel.org/stable/c/ed76d381dae125b81d09934e365391a656249da8

https://git.kernel.org/stable/c/d20674f31626e0596ae4c1d9401dfb6739b81b58

https://git.kernel.org/stable/c/c4f8554996e8ada3be872dfb8f60e93bcf15fb27

https://git.kernel.org/stable/c/c4cbcc64bb31e67e02940ce060cc77f7180564cf

https://git.kernel.org/stable/c/a8abfda768b9f33630cfbc4af6c4214f1e5681b0

https://git.kernel.org/stable/c/a33e967b681e088a125b979975c93e3453e686cd

https://git.kernel.org/stable/c/257f9e5185eb6de83377caea686c306e22e871f2

Details

Source: Mitre, NVD

Published: 2024-10-21

Updated: 2024-11-08

Risk Information

CVSS v2

Base Score: 6.2

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 7.1

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Severity: High