Riskcovery

CVE-2026-6748

Uninitialized memory in the Audio/Video: Web Codecs component

State
Published
Severity
9.8 Critical
Published
Apr 21, 2026
Updated
Jul 15, 2026
Reserved
Apr 21, 2026

Read the record on cve.org

Description

Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCISA-ADP
3.17.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hredhat-SADP

Weaknesses

  • CWE-457 Use of Uninitialized Variable
  • CWE-824 Access of Uninitialized Pointer

Affected Products

ProductVersions
FirefoxMozilla
  • 140.10 through 140.*Not affected
  • 150 and laterNot affected
ThunderbirdMozilla
  • 140.10 through 140.*Not affected
  • 150 and laterNot affected

References

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