by Kastro CVE-2026-2767
Mozilla Firefox — Use-after-free in the JavaScript: WebAssembly component
Description · from the CVE record
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Affected
ProductAffectedFixed inSource
Firefoxsee advisory140.8CNA
Thunderbirdsee advisory140.8CNA
Red Hat Enterprise Linux 10see advisory0:140.8.0-2.el10_1redhat-SADP
Red Hat Enterprise Linux 10see advisory0:140.8.0-2.el10_1redhat-SADP
Red Hat Enterprise Linux 10.0 Extended Update Supportsee advisory0:140.8.0-2.el10_0redhat-SADP
Red Hat Enterprise Linux 10.0 Extended Update Supportsee advisory0:140.8.0-2.el10_0redhat-SADP
Red Hat Enterprise Linux 7 Extended Lifecycle Supportsee advisory0:140.8.0-2.el7_9redhat-SADP
Red Hat Enterprise Linux 8see advisory0:140.8.0-2.el8_10redhat-SADP
Red Hat Enterprise Linux 8see advisory0:140.8.0-1.el8_10redhat-SADP
Red Hat Enterprise Linux 8.2 Advanced Update Supportsee advisory0:140.8.0-2.el8_2redhat-SADP
Red Hat Enterprise Linux 8.2 Advanced Update Supportsee advisory0:140.8.0-1.el8_2redhat-SADP
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportsee advisory0:140.8.0-2.el8_4redhat-SADP
Scores by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
redhat-SADP (CNA)7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total