CVE-2018-12233 — Improper Restriction of Operations within the Bounds of a Memory Buffer in Kernel
CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer19 documents7 sources
Severity
7.8HIGHNVD
OSV5.5OSV4.3
EPSS
0.1%
top 75.64%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJun 12
Latest updateMay 14
Description
In the ea_get function in fs/jfs/xattr.c in the Linux kernel through 4.17.1, a memory corruption bug in JFS can be triggered by calling setxattr twice with two different extended attribute names on the same file. This vulnerability can be triggered by an unprivileged user with the ability to create files and execute programs. A kmalloc call is incorrect, leading to slab-out-of-bounds in jfs_xattr.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9
Affected Packages4 packages
Also affects: Ubuntu Linux 14.04, 16.04, 18.04