high
8.8
CWE
416
EPSS
0.106%
Advisory Published
CVE Published
Updated

CVE-2023-6862: Use After Free

First published: Tue Dec 19 2023(Updated: )

A use-after-free was identified in the `nsDNSService::Init`. This issue appears to manifest rarely during start-up. External Reference: <a href="https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/#CVE-2023-6862">https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/#CVE-2023-6862</a>

Credit: security@mozilla.org

Affected SoftwareAffected VersionHow to fix
redhat/firefox<115.6
115.6
redhat/thunderbird<115.6
115.6
Thunderbird<115.6
115.6
Firefox ESR<115.6
Thunderbird<115.6
Debian=10.0
Debian=11.0
Debian=12.0
Firefox ESR<115.6
115.6
debian/firefox-esr
115.14.0esr-1~deb11u1
128.7.0esr-1~deb11u1
128.5.0esr-1~deb12u1
128.7.0esr-1~deb12u1
128.7.0esr-1
debian/thunderbird
1:115.12.0-1~deb11u1
1:128.7.0esr-1~deb11u1
1:128.5.0esr-1~deb12u1
1:128.7.0esr-1~deb12u1
1:128.7.0esr-1

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

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

    CVE-2023-6862 is a use-after-free vulnerability that impacts Mozilla Firefox ESR and Thunderbird versions prior to 115.6.

  • How do I fix CVE-2023-6862?

    To mitigate CVE-2023-6862, update Mozilla Firefox ESR and Thunderbird to version 115.6 or later.

  • What products are affected by CVE-2023-6862?

    CVE-2023-6862 affects Mozilla Firefox ESR and Thunderbird prior to version 115.6.

  • Where can CVE-2023-6862 be exploited?

    CVE-2023-6862 can potentially be exploited during the startup phase of the affected applications.

  • Is CVE-2023-6862 a critical vulnerability?

    While CVE-2023-6862 has potential implications for security, it is classified as a less frequently exploited use-after-free vulnerability.

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