Is CVE-2023-6862 in the CISA KEV catalog?

No. CVE-2023-6862 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-6862?

CVE-2023-6862 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2023-6862?

CVE-2023-6862 has an EPSS score of 0.95% (57th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-6862?

Upgrade firefox-esr on debian 11 to 115.6.0esr-1~deb11u1 or later. Fixes are available for 18 affected products.

CVE & CISA-KEV Catalog

CVE-2023-6862

HIGH

8.8

CVSS v3

NVD

Description

A use-after-free was identified in the `nsDNSService::Init`. This issue appears to manifest rarely during start-up. This vulnerability affects Firefox ESR < 115.6 and Thunderbird < 115.6.

CWE-416Use After Free

How to fix

Remediation Available

firefox-esrDebian

Fixed in:115.6.0esr-1~deb11u1CVE-2023-6862

Fixed in:115.6.0esr-1~deb12u1CVE-2023-6862

Fixed in:115.6.0esr-1CVE-2023-6862

firefoxRocky

Fixed in:0:115.6.0-1.el7_9RHSA-2024:0026

Fixed in:0:115.6.0-1.el7_9.ppc64RHSA-2024:0026

Fixed in:0:115.6.0-1.el7_9RHSA-2024:0026

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0011

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0011

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0011

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0011

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0023

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0022

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

firefoxRed Hat / RHEL

Fixed in:0:115.6.0-1.el7_9.ppc64RHSA-2024:0026

Fixed in:0:115.6.0-1.el7_9RHSA-2024:0026

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0023

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0011

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0023

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0023

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0022

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0022

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

firefox-debuginfoRed Hat / RHEL

Fixed in:0:115.6.0-1.el7_9RHSA-2024:0026

Fixed in:0:115.6.0-1.el7_9.ppc64RHSA-2024:0026

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0011

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0023

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0022

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0022

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

firefox-debuginfoRocky

Fixed in:0:115.6.0-1.el7_9RHSA-2024:0026

Fixed in:0:115.6.0-1.el7_9.ppc64RHSA-2024:0026

Fixed in:0:115.6.0-1.el7_9RHSA-2024:0026

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0011

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0023

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0022

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0022

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0022

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

firefox-debugsourceRed Hat / RHEL

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0011

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0011

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0011

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0023

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0023

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0022

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

firefox-debugsourceRocky

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0011

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0023

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0023

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0012

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0024

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0021

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0022

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

firefox-x11Red Hat / RHEL

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

firefox-x11Rocky

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0019

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0025

thunderbirdRocky

Fixed in:0:115.6.0-1.el7_9RHSA-2024:0027

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0030

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0030

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

thunderbirdRed Hat / RHEL

Fixed in:0:115.6.0-1.el7_9RHSA-2024:0027

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0030

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0030

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

thunderbird-debuginfoRed Hat / RHEL

Fixed in:0:115.6.0-1.el7_9RHSA-2024:0027

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0030

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

thunderbird-debuginfoRocky

Fixed in:0:115.6.0-1.el7_9RHSA-2024:0027

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0030

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

thunderbird-debugsourceRed Hat / RHEL

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0030

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

thunderbird-debugsourceRocky

Fixed in:0:115.6.0-1.el8_9RHSA-2024:0003

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_4RHSA-2024:0028

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el8_6RHSA-2024:0005

Fixed in:0:115.6.0-1.el8_2RHSA-2024:0030

Fixed in:0:115.6.0-1.el8_8RHSA-2024:0004

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

Fixed in:0:115.6.0-1.el9_3RHSA-2024:0001

Fixed in:0:115.6.0-1.el9_2RHSA-2024:0029

Fixed in:0:115.6.0-1.el9_0RHSA-2024:0002

thunderbirdUbuntu

Fixed in:1:115.6.0+build2-0ubuntu0.20.04.1USN-6563-1

Fixed in:1:115.6.0+build2-0ubuntu0.22.04.1USN-6563-1

Fixed in:1:115.6.0+build2-0ubuntu0.23.04.1USN-6563-1

Fixed in:1:115.6.0+build2-0ubuntu0.23.10.1USN-6563-1

Mozilla Firefox ESR (en-US)Windows application

Affected:115.6Fixed in:115.6Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:115.6Fixed in:115.6Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.95%probability of exploitation in 30 days

57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory5

Issue Tracking1

bugzilla.mozilla.org

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.