libstagefright in Android before 5.1.1 LMY48Z and 6.0 before 2015-12-01 allows remote attackers to obtain sensitive information, and consequently bypass an unspecified protection mechanism, via unknown vectors, as demonstrated by obtaining Signature or SignatureOrSystem access, aka internal bug 24623447.
Conclusion & alert: CVE-2015-6631 is rated Low Risk (38.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.75%). 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 | 0.14% | 0.75% | +0.61% |
| 2 | 2025-03-30 | 0.28% | 0.14% | -0.14% |
| 3 | 2025-03-29 | — | 0.28% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
ubuntu
|
negligible | CVE-2015-6631 negligible priority: Ubuntu including 1 source packages (android), 5 status rows across 5 suites (precise, trusty, upstream, vivid, wily): DNE 2, ignored 2, released 1. | https://ubuntu.com/security/CVE-2015-6631 |
| URL | Tags |
|---|---|
| http://source.android.com/security/bulletin/2015-12-01.html | Vendor Advisory |