high Known exploitedREV. 01
CVE-2015-3246Red Hat libuser — Race Condition Corrupting /etc/passwd
The libuser library, used by the userhelper tool, edits /etc/passwd directly. A local user who triggers an error mid-edit leaves the file in a broken state, denying service; chained with CVE-2015-3245 it can be used to gain privileges.
Read the risk
THE VITAL STATS- CVSS score
- 5.1/ 10 CVSS v3.1
- EPSS probability
- 9% Likelihood of exploitation
- Attack complexity
- High Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2015-08-11
- Added to KEV
- 2026-08-26
- Exploit published
- Yes
- Confidence
- medium
- Kill chain
- privilege escalation
- MITRE ATT&CK
- T1068
- Severity
- high
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attacker needsLocal access as an unprivileged user on a host with the vulnerable libuser and userhelper
Fixed inlibuser 0.56.13-8, libuser 0.60-7
Behind the card
5 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02CISACISA Known Exploited Vulnerabilities catalogcisa.gov
- 03Vendor advisoryrhn.redhat.comrhn.redhat.com
- 04Vendor advisoryrhn.redhat.comrhn.redhat.com
- 05Vendor advisoryaccess.redhat.comaccess.redhat.com
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_at | nvd.nist.gov | 2026-09-21 | scrty-crds-pipeline/0.1 | high |
| exploitation.known_exploited, exploitation.kev_added | cisa.gov | 2026-09-21 | scrty-crds-pipeline/0.1 | high |
| epss | api.first.org | 2026-09-21 | scrty-crds-pipeline/0.1 | high |
| title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisites | nvd.nist.gov | 2026-09-21 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.