CVE-2025-8028

critical

Description

On arm64, a WASM `br_table` instruction with a lot of entries could lead to the label being too far from the instruction causing truncation and incorrect computation of the branch address. This vulnerability affects Firefox < 141, Firefox ESR < 115.26, Firefox ESR < 128.13, Firefox ESR < 140.1, Thunderbird < 141, Thunderbird < 128.13, and Thunderbird < 140.1.

References

https://www.securityweek.com/high-severity-flaws-patched-in-chrome-firefox/

https://www.mozilla.org/security/advisories/mfsa2025-63/

https://www.mozilla.org/security/advisories/mfsa2025-62/

https://www.mozilla.org/security/advisories/mfsa2025-61/

https://www.mozilla.org/security/advisories/mfsa2025-59/

https://www.mozilla.org/security/advisories/mfsa2025-58/

https://www.mozilla.org/security/advisories/mfsa2025-57/

https://www.mozilla.org/security/advisories/mfsa2025-56/

https://bugzilla.mozilla.org/show_bug.cgi?id=1971581

Details

Source: Mitre, NVD

Published: 2025-07-22

Updated: 2025-07-23

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

EPSS

EPSS: 0.00024