The Regular Expressions package in International Components for Unicode (ICU) 52 before SVN revision 292944, as used in Google Chrome before 40.0.2214.91, allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via vectors related to a look-behind expression.
Conclusion & alert: CVE-2014-7923 is rated Moderate Risk (60.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.56%). Mandatory action: Review affected assets and schedule remediation.
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 | 2026-04-20 | 2.28% | 2.56% | +0.29% |
| 2 | 2025-11-29 | 2.70% | 2.28% | -0.42% |
| 3 | 2025-11-24 | — | 2.70% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2014-7923 not yet assigned priority: Debian including 1 source packages (icu), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2014-7923 |
gentoo
|
normal | CVE-2014-7923: 2 GLSA(s) (201502-13, 201503-06), 2 atom(s) (dev-libs/icu, www-client/chromium); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2014-7923 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2014-7923 |
ubuntu
|
medium | CVE-2014-7923 medium priority: Ubuntu including 3 source packages (chromium-browser, icu, oxide-qt), 21 status rows across 7 suites (lucid, precise, trusty, upstream, utopic, vivid, wily): released 14, ignored 3, DNE 2, not-affected 2. | https://ubuntu.com/security/CVE-2014-7923 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| redhat | enterprise_linux_desktop_supplementary | 6.0 | cpe:2.3:o:redhat:enterprise_linux_desktop_supplementary:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_supplementary | 6.0 | cpe:2.3:o:redhat:enterprise_linux_server_supplementary:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_supplementary_eus | 6.6.z | cpe:2.3:o:redhat:enterprise_linux_server_supplementary_eus:6.6.z:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation_supplementary | 6.0 | cpe:2.3:o:redhat:enterprise_linux_workstation_supplementary:6.0:*:*:*:*:*:*:* |
| opensuse | opensuse | 13.1 | cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:* |
| opensuse | opensuse | 13.2 | cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* |
| icu-project | international_components_for_unicode | < 55.1 | cpe:2.3:a:icu-project:international_components_for_unicode:*:*:*:*:*:c\/c\+\+:*:* |
| oracle | communications_messaging_server | 7.0.5 | cpe:2.3:a:oracle:communications_messaging_server:7.0.5:*:*:*:*:*:*:* |
| oracle | communications_messaging_server | 8.0 | cpe:2.3:a:oracle:communications_messaging_server:8.0:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 14.10 | cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:* |
| chrome | <= 40.0.2214.85 | cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* |