CVE-2017-18075

Name: CVE-2017-18075
Creator: NVD / NIST
Published: 2018-01-24T10:29:00.223+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2017-18075 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.41%

32.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-763

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 4.2, < 4.4.111
Linux	Linux Kernel	>= 4.5, < 4.9.76
Linux	Linux Kernel	>= 4.10, < 4.14.13
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d76c68109f37cb85b243a1cf0f40313afd2bae68Issue Tracking, Patch, Third Party Advisory
http://www.securityfocus.com/bid/102813Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
https://github.com/torvalds/linux/commit/d76c68109f37cb85b243a1cf0f40313afd2bae68Patch
https://usn.ubuntu.com/3619-1/Third Party Advisory
https://usn.ubuntu.com/3619-2/Third Party Advisory
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.13Issue Tracking, Release Notes, Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d76c68109f37cb85b243a1cf0f40313afd2bae68Issue Tracking, Patch, Third Party Advisory
http://www.securityfocus.com/bid/102813Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
https://github.com/torvalds/linux/commit/d76c68109f37cb85b243a1cf0f40313afd2bae68Patch
https://usn.ubuntu.com/3619-1/Third Party Advisory
https://usn.ubuntu.com/3619-2/Third Party Advisory
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.13Issue Tracking, Release Notes, Vendor Advisory

Timeline

Published: Jan 24, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-18075?

How severe is CVE-2017-18075?

CVE-2017-18075 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2017-18075?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-18075?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST