What is CVE-2017-18075?

CVE-2017-18075 is a high-severity vulnerability in Linux Kernel, classified under Release of Invalid Pointer or Reference. CVSS score: 7.8/10. Published 2018-01-24.

How severe is CVE-2017-18075?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2017-18075 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux Kernel

CVE-2017-18075

crypto/pcrypt.c in the Linux kernel before 4.14.13 mishandles freeing instances, allowing a local user able to access the AF_ALG-based AEAD interface (CONFIG_CRYPTO_USER_API_AEAD) and pcrypt (CONFIG_CRYPTO_PCRYPT) to cause a denial of service (kfree of an incorrect pointer) or possibly have unspecified other impact by executing a crafted sequence of system calls.

Published 2018-01-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (31.5th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: -0.000

Affected products

Linux Kernel
Canonical Ubuntu Linux — versions 14.04, 16.04

Weakness classification (CWE)

CWE-763 — Release of Invalid Pointer or Reference

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

www.securityfocus.com/bid/102813 (VDB Entry, Third Party Advisory, vdb-entry)
usn.ubuntu.com/3619-2/ (vendor-advisory, Third Party Advisory)
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.13 (Release Notes, Issue Tracking, Vendor Advisory)
access.redhat.com/errata/RHSA-2018:2948 (vendor-advisory, Third Party Advisory)
github.com/torvalds/linux/commit/d76c68109f37cb85b243a1cf0f40313afd2bae68 (Patch)
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Third Party Advisory, Issue Tracking)
usn.ubuntu.com/3619-1/ (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2017-18075?: CVE-2017-18075 is a high-severity vulnerability in Linux Kernel, classified under Release of Invalid Pointer or Reference. CVSS score: 7.8/10. Published 2018-01-24.
How severe is CVE-2017-18075?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2017-18075 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.