Race Condition Affecting thunderbird package, versions <1:115.6.0-1~deb12u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.67% (47th percentile)

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  • Snyk IDSNYK-ECHOLATEST-THUNDERBIRD-18318742
  • published26 Jul 2026
  • disclosed19 Dec 2023

Introduced: 19 Dec 2023

CVE-2023-6857  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Echo:latest thunderbird to version 1:115.6.0-1~deb12u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

When resolving a symlink, a race may occur where the buffer passed to readlink may actually be smaller than necessary. This bug only affects Firefox on Unix-based operating systems (Android, Linux, MacOS). Windows is unaffected. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

CVSS Base Scores

version 3.1