The polkit_backend_action_pool_init function in polkitbackend/polkitbackendactionpool.c in PolicyKit (aka polkit) before 0.113 might allow local users to gain privileges via duplicate action IDs in action descriptions.
Conclusion & alert: CVE-2015-3255 is rated Low Risk (28.5/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.36%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.10% | 0.36% | +0.26% |
| 2 | 2025-07-12 | 0.04% | 0.10% | +0.06% |
| 3 | 2025-06-26 | — | 0.04% | — |
Full EPSS history (6 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.6 | 2.0 | MEDIUM |
|
3.9 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2015-3255 not yet assigned priority: Debian including 1 source packages (policykit-1), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2015-3255 |
gentoo
|
normal | CVE-2015-3255: 1 GLSA(s) (201611-07), 1 atom(s) (sys-auth/polkit); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-3255 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2015-3255 |
suse
|
medium | CVE-2015-3255 severity moderate: SUSE including 308 source package names (PolicyKit, PolicyKit-32bit, …), 429 product×package rows across 77 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-Basic-On-Demand, … (77 product lines)): Known Affected 231, Fixed 184, Known Not Affected 14. | https://www.suse.com/security/cve/CVE-2015-3255/ |
ubuntu
|
low | CVE-2015-3255 low priority: Ubuntu including 1 source packages (policykit-1), 10 status rows across 10 suites (artful, bionic, precise, trusty, upstream, vivid, wily, xenial, yakkety, zesty): released 7, ignored 2, needs-triage 1. | https://ubuntu.com/security/CVE-2015-3255 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| polkit_project | polkit | <= 0.112 | cpe:2.3:a:polkit_project:polkit:*:*:*:*:*:*:*:* |