cbcvebase.
CVE-2024-42105
published 2024-07-30

CVE-2024-42105: In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix inode number range checks Patch series "nilfs2: fix potential issues related to…

PriorityP339high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.26%
17.7th percentile
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix inode number range checks Patch series "nilfs2: fix potential issues related to reserved inodes". This series fixes one use-after-free issue reported by syzbot, caused by nilfs2's internal inode being exposed in the namespace on a corrupted filesystem, and a couple of flaws that cause problems if the starting number of non-reserved inodes written in the on-disk super block is intentionally (or corruptly) changed from its default value. This patch (of 3): In the current implementation of nilfs2, "nilfs->ns_first_ino", which gives the first non-reserved inode number, is read from the superblock, but its lower limit is not checked. As a result, if a number that overlaps with the inode number range of reserved inodes such as the root directory or metadata files is set in the super block parameter, the inode number test macros (NILFS_MDT_INODE and NILFS_VALID_INODE) will not function properly. In addition, these test macros use left bit-shift calculations using with the inode number as the shift count via the BIT macro, but the result of a shift calculation that exceeds the bit width of an integer is undefined in the C specification, so if "ns_first_ino" is set to a large value other than the default value NILFS_USER_INO (=11), the macros may potentially malfunction depending on the environment. Fix these issues by checking the lower bound of "nilfs->ns_first_ino" and by preventing bit shifts equal to or greater than the NILFS_USER_INO constant in the inode number test macros. Also, change the type of "ns_first_ino" from signed integer to unsigned integer to avoid the need for type casting in comparisons such as the lower bound check introduced this time.

Affected

26 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.98-1 (bookworm)linux 6.1.98-1 (bookworm)
debianlinux-6.1< linux 6.1.98-1 (bookworm)linux 6.1.98-1 (bookworm)
linuxlinux
linuxlinux>= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f < 57235c3c88bb430043728d0d02f44a4efe38647657235c3c88bb430043728d0d02f44a4efe386476
linuxlinux>= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f < 08cab183a624ba71603f3754643ae11cab34dbc408cab183a624ba71603f3754643ae11cab34dbc4
linuxlinux>= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f < 731011ac6c37cbe97ece229fc6daa486276052c5731011ac6c37cbe97ece229fc6daa486276052c5
linuxlinux>= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f < 3be4dcc8d7bea52ea41f87aa4bbf959efe7a59873be4dcc8d7bea52ea41f87aa4bbf959efe7a5987
linuxlinux>= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f < fae1959d6ab2c52677b113935e36ab4e25df37eafae1959d6ab2c52677b113935e36ab4e25df37ea
linuxlinux>= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f < 9194f8ca57527958bee207919458e372d638d7839194f8ca57527958bee207919458e372d638d783
linuxlinux>= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f < 1c91058425a01131ea30dda6cf43c67b17884d6a1c91058425a01131ea30dda6cf43c67b17884d6a
linuxlinux>= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f < e2fec219a36e0993642844be0f345513507031f4e2fec219a36e0993642844be0f345513507031f4
linuxlinux_kernel< 4.19.3184.19.318
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.223-15.10.223-1
linuxlinux_kernel>= 0 < 6.1.98-16.1.98-1
linuxlinux_kernel>= 0 < 6.9.9-16.9.9-1
linuxlinux_kernel>= 0 < 6.9.9-16.9.9-1
linuxlinux_kernel>= 0 < 5.4.0-195.2155.4.0-195.215
linuxlinux_kernel>= 0 < 5.15.0-121.1315.15.0-121.131
linuxlinux_kernel>= 0 < 6.8.0-48.486.8.0-48.48
linuxlinux_kernel>= 4.20 < 5.4.2805.4.280
linuxlinux_kernel>= 5.11 < 5.15.1635.15.163
linuxlinux_kernel>= 5.16 < 6.1.986.1.98
linuxlinux_kernel>= 5.5 < 5.10.2225.10.222
linuxlinux_kernel>= 6.2 < 6.6.396.6.39

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu7.8HIGH
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