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CVE-2021-29986

Date: August 17, 2021

A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash. *Note: This issue only affected Linux operating systems. Other operating systems are unaffected.* This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.

Severity Score

Related Resources (13)

https://nvd.nist.gov/vuln/detail/CVE-2021-29986
https://security.gentoo.org/glsa/202208-14
https://bugzilla.mozilla.org/show_bug.cgi?id=1696138
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-29986
https://security.alpinelinux.org/vuln/CVE-2021-29986
https://security-tracker.debian.org/tracker/CVE-2021-29986
https://security.gentoo.org/glsa/202202-03
https://www.mozilla.org/security/advisories/mfsa2021-36/
https://www.mozilla.org/security/advisories/mfsa2021-33/
https://access.redhat.com/security/cve/CVE-2021-29986
https://www.mozilla.org/security/advisories/mfsa2021-35/
https://www.mozilla.org/security/advisories/mfsa2021-34/
https://www.mend.io/vulnerability-database/CVE-2021-29986

Severity Score

Weakness Type (CWE)

Race Conditions

CWE-362

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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