CVE-2020-6840

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

In mruby 2.1.0, there is a use-after-free in hash_slice in mrbgems/mruby-hash-ext/src/hash-ext.c.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

No affected versions have been published.

Timeline

Published
Jan 11, 2020
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2020

CVE-2020-68419.8D-Link DCH-M225 1.05b01 and earlier devices allow remote attackers to execute arbitrary OS commands via shell metacharacters in the spotifyCCVE-2020-68427.2D-Link DCH-M225 1.05b01 and earlier devices allow remote authenticated admins to execute arbitrary OS commands via shell metacharacters in tCVE-2020-68434.8Zoho ManageEngine ServiceDesk Plus 11.0 Build 11007 allows XSS. This issue was fixed in version 11.0 Build 11010, SD-83959.CVE-2020-68448.8In TopManage OLK 2020, login CSRF can be chained with another vulnerability in order to takeover admin and user accounts.CVE-2020-68456.1An issue was discovered in TopManage OLK 2020. As there is no ReadOnly on the Session cookie, the user and admin accounts can be taken over CVE-2020-68475.4OpenTrade through 0.2.0 has a DOM-based XSS vulnerability that is executed when an administrator attempts to delete a message that contains CVE-2020-68486.1Axper Vision II 4 devices allow XSS via the DEVICE_NAME (aka Device Name) parameter to the configWebParams.cgi URI.CVE-2020-68498.8The marketo-forms-and-tracking plugin through 1.0.2 for WordPress allows wp-admin/admin.php?page=marketo_fat CSRF with resultant XSS.CVE-2020-68506.1Utilities.php in the miniorange-saml-20-single-sign-on plugin before 4.8.84 for WordPress allows XSS via a crafted SAML XML Response to wp-lCVE-2020-68517.5OpenJPEG through 2.3.1 has a heap-based buffer overflow in opj_t1_clbl_decode_processor in openjp2/t1.c because of lack of opj_j2k_update_imCVE-2020-68529.8CACAGOO Cloud Storage Intelligent Camera TV-288ZD-2MP with firmware 3.4.2.0919 has weak authentication of TELNET access, leading to root priCVE-2020-68545.4A cross-site scripting (XSS) vulnerability in the JOC Cockpit component of SOS JobScheduler 1.11 and 1.13.2 allows attackers to inject arbit
CVE-2020-6840: Critical severity, CVSS 9.8 | Vulnix