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SUSE MozillaFirefox Important Fix Denial-of-Service Issue 2026-2582-1

suse
Calendar Grey June 23, 2026
Dist Suse Esm H88
Solve 29 important issues in Mozilla Firefox with the latest security fix from SUSE's advisory. Install to protect your system.
An update that solves 29 vulnerabilities can now be installed.

Summary

## This update for MozillaFirefox fixes the following issues: Update to Firefox 140.12.0 ESR (MFSA 2026-58, bsc#1268071): * CVE-2026-12289: Privilege escalation in the Graphics: WebRender component. * CVE-2026-12290: Memory safety bug fixed in Firefox ESR 140.12. * CVE-2026-12291: Use-after-free in the Networking: HTTP component. * CVE-2026-12292: Incorrect boundary conditions in the Web Audio component. * CVE-2026-12294: Sandbox escape in the DOM: Workers component. * CVE-2026-12295: Sandbox escape in the DOM: Navigation component. * CVE-2026-12296: Sandbox escape in the Security: Process Sandboxing component. * CVE-2026-12297: Sandbox escape due to incorrect boundary conditions in the Networking component. * CVE-2026-12298: Memory safety bug fixed in Firefox ESR 140.12.

Topics%20covered

Topics Covered

security advisory denial of service SuSE vulnerability important mozilla firefox

References

* bsc#1268071

Cross-

* CVE-2026-12289

* CVE-2026-12290

* CVE-2026-12291

* CVE-2026-12292

* CVE-2026-12294

* CVE-2026-12295

* CVE-2026-12296

* CVE-2026-12297

* CVE-2026-12298

* CVE-2026-12299

* CVE-2026-12302

* CVE-2026-12304

* CVE-2026-12305

* CVE-2026-12306

* CVE-2026-12307

* CVE-2026-12308

* CVE-2026-12309

* CVE-2026-12310

* CVE-2026-12311

* CVE-2026-12312

* CVE-2026-12313

* CVE-2026-12314

* CVE-2026-12315

* CVE-2026-12324

* CVE-2026-12325

* CVE-2026-12327

* CVE-2026-12328

* CVE-2026-12329

* CVE-2026-12330

CVSS scores:

* CVE-2026-12289 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

* CVE-2026-12290 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

* CVE-2026-12290 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2582-1
Release Date: 2026-06-23T13:27:08Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service SuSE vulnerability important mozilla firefox

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