CVE-2018-12233
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedJun 12, 2018
First seenJun 12, 2018
How to fix
Update
- linux linux_kernel3.16.58, 3.18.118, 4.4.147, 4.9.119, 4.14.62, 4.17.14 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 2.6.12 ≤ v < 3.16.58, 3.17 ≤ v < 3.18.118, 3.19 ≤ v < 4.4.147, 4.5 ≤ v < 4.9.119, 4.10 ≤ v < 4.14.62, 4.15 ≤ v < 4.17.14 | 3.16.58, 3.18.118, 4.4.147, 4.9.119, 4.14.62, 4.17.14 |
| canonical ubuntu_linux | 14.04, 16.04, 18.04 | — |
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