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.
02 Description
slock allows attackers to bypass the screen lock via vectors involving an invalid password hash, which triggers a NULL pointer dereference and crash.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.89% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 86.8% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2017-02-15 19:00Z9 YR AGO
- Last updated
- 2024-08-06 01:43Z2 YR AGO
- Reserved
- 2016-08-18
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-476NULL Pointer DereferenceBase
- Data version
- 5.1
- Document digest
- 39e16f929de86396fa79bab9ec55e13bf20c22f392dd19c2dcc6d857eaa316f2
05 Affected products
06 References
- www.openwall.com[oss-security] 20160818 Re: CVE request - slock, all versions NULL pointer dereferencehttp://www.openwall.com/lists/oss-security/2016/08/18/24
- s1m0n.dft-labs.euhttp://s1m0n.dft-labs.eu/files/slock/slock.txt
- lists.fedoraproject.orgFEDORA-2016-985b68721bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RZPEJQNVODYSI4WQXM5GQKXRO7TPK2VG/
- www.openwall.com[oss-security] 20160818 CVE request - slock, all versions NULL pointer dereferencehttp://www.openwall.com/lists/oss-security/2016/08/18/22
- git.suckless.orghttp://git.suckless.org/slock/commit/?id=d8bec0f6fdc8a246d78cb488a0068954b46fcb29
- lists.fedoraproject.orgFEDORA-2016-1b7e66c08bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2FYPV6QQPPYBL3Z2BYNYEJB67FSC55OR/
- www.securityfocus.com92546http://www.securityfocus.com/bid/92546
07 Fixed in
Arch Linux
- slock Fixed in 1.4-2
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- suckless-tools Fixed in 41-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- suckless-tools Fixed in 41-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- suckless-tools Fixed in 41-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- suckless-tools Fixed in 40-1+deb8u2build0.14.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.