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CVE-2025-11715

HIGH8.8

Memory safety bugs fixed in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144 and Thunderbird 144

Published Oct 14, 2025

Modified 2 months ago

Fix available

Details

Memory safety bugs present in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 144, Firefox ESR < 140.4, Thunderbird < 144, and Thunderbird < 140.4.

Affected Packages

Ubuntu:14.04:LTSFirefox

Fixed in:

144

Ubuntu:16.04:LTSFirefox

Fixed in:

144

Ubuntu:18.04:LTSFirefox

Fixed in:

144

Ubuntu:20.04:LTSFirefox

Fixed in:

144

Ubuntu:22.04:LTSFirefox

Fixed in:

144

Ubuntu:24.04:LTSFirefox

Fixed in:

144

Ubuntu:25.04Firefox

Fixed in:

144

Ubuntu:25.10Firefox

Fixed in:

144

Windows:10240Mozilla Firefox

Fixed in:

144

Windows:10240Mozilla Firefox ESR

Fixed in:

140.4

Windows:14393Mozilla Firefox

Fixed in:

144

Windows:14393Mozilla Firefox ESR

Fixed in:

140.4

Windows:17763Mozilla Firefox

Fixed in:

144

Windows:17763Mozilla Firefox ESR

Fixed in:

140.4

Windows:18362Mozilla Firefox

Fixed in:

144

Windows:18362Mozilla Firefox ESR

Fixed in:

140.4

Windows:18363Mozilla Firefox

Fixed in:

144

Windows:18363Mozilla Firefox ESR

Fixed in:

140.4

Windows:19041Mozilla Firefox

Fixed in:

144

Windows:19041Mozilla Firefox ESR

Fixed in:

140.4

Windows:19042Mozilla Firefox

Fixed in:

144

Windows:19042Mozilla Firefox ESR

Fixed in:

140.4

Windows:19043Mozilla Firefox

Fixed in:

144

Windows:19043Mozilla Firefox ESR

Fixed in:

140.4

Windows:19044Mozilla Firefox

Fixed in:

144

Windows:19044Mozilla Firefox ESR

Fixed in:

140.4

Windows:19045Mozilla Firefox

Fixed in:

144

Windows:19045Mozilla Firefox ESR

Fixed in:

140.4

Windows:20348Mozilla Firefox

Fixed in:

144

Windows:20348Mozilla Firefox ESR

Fixed in:

140.4

Windows:22000Mozilla Firefox

Fixed in:

144

Windows:22000Mozilla Firefox ESR

Fixed in:

140.4

Windows:22621Mozilla Firefox

Fixed in:

144

Windows:22621Mozilla Firefox ESR

Fixed in:

140.4

Windows:22631Mozilla Firefox

Fixed in:

144

Windows:22631Mozilla Firefox ESR

Fixed in:

140.4

Windows:25398Mozilla Firefox

Fixed in:

144

Windows:25398Mozilla Firefox ESR

Fixed in:

140.4

Windows:26100Mozilla Firefox

Fixed in:

144

Windows:26100Mozilla Firefox ESR

Fixed in:

140.4

Windows:26200Mozilla Firefox

Fixed in:

144

Windows:26200Mozilla Firefox ESR

Fixed in:

140.4

macOS:14Firefox

Fixed in:

144

macOS:14Firefox ESR

Fixed in:

140.4

macOS:15Firefox

Fixed in:

144

macOS:15Firefox ESR

Fixed in:

140.4

macOS:26Firefox

Fixed in:

144

macOS:26Firefox ESR

Fixed in:

140.4

References

WEBhttps://bugzilla.mozilla.org/buglist.cgi?bug_id=1983838%2C1987624%2C1988244%2C1988912%2C1989734%2C1990085%2C1991899 WEBhttps://lists.debian.org/debian-lts-announce/2025/10/msg00015.html WEBhttps://lists.debian.org/debian-lts-announce/2025/10/msg00031.html ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2025-11715 WEBhttps://www.mozilla.org/security/advisories/mfsa2025-81/WEBhttps://www.mozilla.org/security/advisories/mfsa2025-83/WEBhttps://www.mozilla.org/security/advisories/mfsa2025-84/WEBhttps://www.mozilla.org/security/advisories/mfsa2025-85/

CVSS Analysis

CVSS v3.1

8.8

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

RequiredUI:R

Scope

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

8.8/CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Timeline

PublishedOct 14, 2025

ModifiedNov 3, 2025

CVE-2025-11715 | Mondoo Vulnerability Intelligence