CVE-2015-3246libuser 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 (incon…
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It affects redhat enterprise_linux and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Aug 26, 2026; federal agencies had to remediate by Sep 9, 2026. Treat that date as your deadline.
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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.
- CVSS
- 7.4 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-367
- Known exploited
- Added to CISA KEV Aug 26, 2026; federal remediation due Sep 9, 2026Apply 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.
- EPSS (exploitation in the next 30 days)
- 8.50% (percentile 95)
- Assigned by
- redhat
- NVD analysis
- Analyzed
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
redhat enterprise_linux redhat:enterprise_linux | 5.0; 6.0; 7.0 | NVD |
opensuse opensuse opensuse:opensuse | 13.2 | NVD |
libuser_project libuser libuser_project:libuser | before 0.56.13-8; from 0.60 before 0.60-7 | NVD |
References
- http://www.securityfocus.com/bid/76022vdb-entry, x-refsource-bid, third-party-advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162947.htmlvendor-advisory, x-refsource-fedora, broken-link
- https://www.exploit-db.com/exploits/44633/exploit, x-refsource-exploit-db, third-party-advisory, vdb-entry
- https://access.redhat.com/articles/1537873x-refsource-confirm, mitigation, vendor-advisory
- http://rhn.redhat.com/errata/RHSA-2015-1482.htmlvendor-advisory, x-refsource-redhat
- http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163044.htmlvendor-advisory, x-refsource-fedora, broken-link
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00000.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- https://www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txtx-refsource-misc, exploit
- http://www.securitytracker.com/id/1033040vdb-entry, x-refsource-sectrack, third-party-advisory
- http://rhn.redhat.com/errata/RHSA-2015-1483.htmlvendor-advisory, x-refsource-redhat
- https://blog.talosintelligence.com/uat-10147-chinese-speaking-adversary-integrates-agentic-ai-into-post-compromise-operations/third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-3246us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.