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Vulnerability · Published Nov 21, 2023 · Assigned by mozilla

CVE-2023-6207

High 8.8

In plain English

A high-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)8.8High
Exploit odds (30 days)0.9%top 40.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

Ownership mismanagement led to a use-after-free in ReadableByteStreams This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8firefox115.5.0-1.el8_9.alma.1ALSA-2023:7508
AlmaLinux:9firefox115.5.0-1.el9_3.alma.1ALSA-2023:7507
AlmaLinux:9firefox-x11115.5.0-1.el9_3.alma.1ALSA-2023:7507
AlmaLinux:8thunderbird115.5.0-1.el8_9.alma.1ALSA-2023:7500
AlmaLinux:9thunderbird115.5.0-1.el9_3.almaALSA-2023:7501
Alpine:v3.20firefox-esr115.5.0-r0ALPINE-CVE-2023-6207
Alpine:v3.21firefox-esr115.5.0-r0ALPINE-CVE-2023-6207
Alpine:v3.22firefox-esr115.5.0-r0ALPINE-CVE-2023-6207
Alpine:v3.23firefox-esr115.5.0-r0ALPINE-CVE-2023-6207
Alpine:v3.20thunderbird115.5.0-r0ALPINE-CVE-2023-6207
Alpine:v3.21thunderbird115.5.0-r0ALPINE-CVE-2023-6207
Alpine:v3.22thunderbird115.5.0-r0ALPINE-CVE-2023-6207
Alpine:v3.23thunderbird115.5.0-r0ALPINE-CVE-2023-6207
Debian:12firefox-esr115.5.0esr-1~deb12u1DSA-5561-1
Debian:12firefox-esr115.5.0esr-1~deb12u1DEBIAN-CVE-2023-6207
Debian:13firefox-esr115.5.0esr-1DEBIAN-CVE-2023-6207
Debian:14firefox-esr115.5.0esr-1DEBIAN-CVE-2023-6207
Debian:12thunderbird1:115.5.0-1~deb12u1DSA-5566-1
Debian:12thunderbird1:115.5.0-1~deb12u1DEBIAN-CVE-2023-6207
Debian:13thunderbird1:115.5.0-1DEBIAN-CVE-2023-6207
Debian:14thunderbird1:115.5.0-1DEBIAN-CVE-2023-6207
Rocky Linux:8thunderbird0:115.5.0-1.el8_9RLSA-2023:7500
Ubuntu:22.04:LTSmozjs102no fix listedUBUNTU-CVE-2023-6207
Ubuntu:24.04:LTSmozjs102no fix listedUBUNTU-CVE-2023-6207
Ubuntu:22.04:LTSmozjs78no fix listedUBUNTU-CVE-2023-6207
Ubuntu:22.04:LTSmozjs91no fix listedUBUNTU-CVE-2023-6207
Ubuntu:22.04:LTSthunderbird1:115.5.0+build1-0ubuntu0.22.04.1USN-6515-1
Ubuntu:22.04:LTSthunderbird1:115.5.0+build1-0ubuntu0.22.04.1UBUNTU-CVE-2023-6207
Ubuntu:24.04:LTSthunderbird1:115.5.0+build1-0ubuntu1UBUNTU-CVE-2023-6207

Affected products (as reported)

VendorProductVersions
Mozilla Firefox unspecified – before 120
Mozilla Firefox ESR unspecified – before 115.5.0
Mozilla Thunderbird unspecified – before 115.5

References