CVE-2015-3246
Exploitation confirmed. First attested on 2026-08-26 by CISA-ADP, CISA KEV, GCVE · previdian.
- Published2015-08-11
- WeaknessCWE-264 · CWE-367
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd, which allows local users to cause a denial of service (inconsistent file state) by causing an error during the modification. NOTE: this issue can be combined with CVE-2015-3245 to gain privileges.
Timeline
dates in UTCObserved activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2015-3246?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2015-3246?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.0 | = 5.0 | no fix published | NVD |
| 6.0 | = 6.0 | no fix published | NVD |
| 7.0 | = 7.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 0.60 | ≥ 0.60, < 0.60-7 | 0.60-7 | NVD |
| 0.56 | < 0.56.13-8 | 0.56.13-8 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 13.2 | = 13.2 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- CISA’s required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.due 2026-09-09
Advisories and patches
- rhn.redhat.comVendor Advisory
- rhn.redhat.comVendor Advisory
- access.redhat.comMitigation · Vendor Advisory
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
CISA Known Exploited Vulnerability
- Date Added
- 2026-08-26
- Patch Due Date
- 2026-09-09
- Ransomware Use
- Unknown
- Required Action
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Sources
- CISA KEVKEV entry2026-08-26
- GCVEexploitation2026-08-26
- CISA-ADPSSVC decisionactive2026-08-27
- OpenCVESSVC decisionactive—
- CISA-ADPCVSS 3.17.42026-08-25
- NVDCVSS 2.07.2read 2026-10-23
- CISA-ADPweakness (CWE)CWE-3672026-08-25
- NVDweakness (CWE)CWE-264read 2026-10-23
- FIRST EPSSEPSS score8.5 %2026-10-23
- PoC-in-GitHubproof of concept1read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2015-08-11
- Last Modified
- 2026-10-02
- NVD status
- Analyzed
Frequently asked questions
What is CVE-2015-3246?
Is CVE-2015-3246 actively exploited?
What is the CVSS score for CVE-2015-3246?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.