Use-after-free in Linux kernel - CVE-2018-10879
Published: July 26, 2018 / Updated: June 1, 2020
Vulnerability identifier: #VU28378
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-10879
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local authenticated user to execute arbitrary code.
A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause a use-after-free in ext4_xattr_set_entry function and a denial of service or unspecified other impact may occur by renaming a file in a crafted ext4 filesystem image.
Affected software
Linux kernel
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
Opensuse
kernel-alt (Red Hat package)
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
Opensuse
kernel-alt (Red Hat package)
How to mitigate CVE-2018-10879
Install update from vendor's website.
Linux kernel - addressed in versions 4.4.162, 4.9.133, 4.14.55, 4.17.6
kernel-alt (Red Hat package) - update to 4.14.0-115.el7a
kernel-alt (Red Hat package) - update to 4.14.0-115.el7a
External References
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.55
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.17.6
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.161
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.133
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.162