CVE-2016-6866

Name: CVE-2016-6866
Creator: NVD / NIST
Published: 2017-02-15T19:59:00.407+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.89%

Last modified Jun 17, 2026

CVE-2016-6866 is a vulnerability of currently unknown severity. slock allows attackers to bypass the screen lock via vectors involving an invalid password hash, which triggers a NULL pointer dereference and crash.. EPSS estimates a 2.89% chance of exploitation in the next 30 days.

Description

slock allows attackers to bypass the screen lock via vectors involving an invalid password hash, which triggers a NULL pointer dereference and crash.

Metrics

EPSS Probability

2.89%

85.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Suckless	Slock	<= 1.3
Fedoraproject	Fedora	24
Fedoraproject	Fedora	25

References

http://git.suckless.org/slock/commit/?id=d8bec0f6fdc8a246d78cb488a0068954b46fcb29Patch, Vendor Advisory
http://s1m0n.dft-labs.eu/files/slock/slock.txtThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/08/18/22Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/08/18/24Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/92546Third Party Advisory, VDB Entry
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2FYPV6QQPPYBL3Z2BYNYEJB67FSC55OR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RZPEJQNVODYSI4WQXM5GQKXRO7TPK2VG/
http://git.suckless.org/slock/commit/?id=d8bec0f6fdc8a246d78cb488a0068954b46fcb29Patch, Vendor Advisory
http://s1m0n.dft-labs.eu/files/slock/slock.txtThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/08/18/22Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/08/18/24Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/92546Third Party Advisory, VDB Entry
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2FYPV6QQPPYBL3Z2BYNYEJB67FSC55OR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RZPEJQNVODYSI4WQXM5GQKXRO7TPK2VG/

Timeline

Published: Feb 15, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-6866?

slock allows attackers to bypass the screen lock via vectors involving an invalid password hash, which triggers a NULL pointer dereference and crash.

How severe is CVE-2016-6866?

Severity scoring for CVE-2016-6866 is pending analysis. The EPSS model estimates a 2.89% probability of exploitation in the next 30 days.

How do I fix CVE-2016-6866?

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-2016-6866?

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

Scan your code now

Source: NVD / NIST