Vulnerability CVE-2018-14619
Published: 2018-08-30

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.

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:L/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.2/10
10/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Linux -> Linux kernel 

 References:
http://www.securityfocus.com/bid/105200
https://access.redhat.com/errata/RHSA-2018:2948
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14619
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b32a7dc8aef1882fbf983eb354837488cc9d54dc
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0013
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