8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.003 Low
EPSS
Percentile
69.9%
During browser shutdown, reference decrementing could have occured on a
previously freed object, resulting in a use-after-free, memory corruption,
and a potentially exploitable crash. This vulnerability affects Firefox <
83, Firefox ESR < 78.5, and Thunderbird < 78.5.
Author | Note |
---|---|
tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | firefox | < 83.0+build2-0ubuntu0.18.04.2 | UNKNOWN |
ubuntu | 20.04 | noarch | firefox | < 83.0+build2-0ubuntu0.20.04.1 | UNKNOWN |
ubuntu | 20.10 | noarch | firefox | < 83.0+build2-0ubuntu0.20.10.1 | UNKNOWN |
ubuntu | 21.04 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
ubuntu | 21.10 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
ubuntu | 22.04 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
ubuntu | 22.10 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
ubuntu | 23.04 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
ubuntu | 23.10 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
ubuntu | 24.04 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
launchpad.net/bugs/cve/CVE-2020-26959
nvd.nist.gov/vuln/detail/CVE-2020-26959
security-tracker.debian.org/tracker/CVE-2020-26959
ubuntu.com/security/notices/USN-4637-1
ubuntu.com/security/notices/USN-4637-2
ubuntu.com/security/notices/USN-4647-1
www.cve.org/CVERecord?id=CVE-2020-26959
www.mozilla.org/en-US/security/advisories/mfsa2020-50/#CVE-2020-26959
www.mozilla.org/en-US/security/advisories/mfsa2020-52/#CVE-2020-26959
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.003 Low
EPSS
Percentile
69.9%