What’s Vulnerable › Vulnerabilities

CVE-2016-6866

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-02-15 · updated 2026-06-17
• Weakness: CWE-476

Description

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

Affected products

• Fedoraproject Fedora: 24, 25
• Suckless Slock: through 1.3

References

• http://git.suckless.org/slock/commit/?id=d8bec0f6fdc8a246d78cb488a0068954b46fcb29
• http://s1m0n.dft-labs.eu/files/slock/slock.txt
• http://www.openwall.com/lists/oss-security/2016/08/18/22
• http://www.openwall.com/lists/oss-security/2016/08/18/24
• http://www.securityfocus.com/bid/92546
• 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=d8bec0f6fdc8a246d78cb488a0068954b46fcb29
• http://s1m0n.dft-labs.eu/files/slock/slock.txt
• http://www.openwall.com/lists/oss-security/2016/08/18/22
• http://www.openwall.com/lists/oss-security/2016/08/18/24
• http://www.securityfocus.com/bid/92546

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