Description
A flaw was found in the crypto subsystem of the Linux kernel before version kernel-4.15-rc4. The "null skcipher" was being dropped when each af_alg_ctx was freed instead of when the aead_tfm was freed. This can cause the null skcipher to be freed while it is still in use leading to a local user being able to crash the system or possibly escalate privileges.
References (5)
Core 5
Core References
Patch, Vendor Advisory x_refsource_confirm
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b32a7dc8aef1882fbf983eb354837488cc9d54dc
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:2948
Third Party Advisory x_refsource_confirm
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0013
Issue Tracking, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14619
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/105200
Scores
CVSS v3
7.8
EPSS
0.0043
EPSS Percentile
34.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-20
CWE-416
Status
published
Products (2)
linux/linux_kernel
4.15 rc1 (3 CPE variants)
linux/linux_kernel
4.14 - 4.14.8
Published
Aug 30, 2018
Tracked Since
Feb 18, 2026