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

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

Details

Risk Information

CVSS v2

CVSS v3