CVE-2025-8033CWE-476

CVE-2025-8033

Medium · published July 23, 2025

CVSS v3.1
6.5
EPSS
0%
Percentile
33.3
In the wild
Unconfirmed
What it is

The JavaScript engine did not handle closed generators correctly and it was possible to resume them leading to a nullptr deref. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00402 · 33.3th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2025-07-23T01:15Z
Affected products (7)
ProductVersionsFixed in
mozilla/firefox< 115.26.0115.26.0
mozilla/firefox< 141.0141.0
mozilla/firefox≥ 128.0, < 128.13.0128.13.0
mozilla/firefox≥ 140.0, < 140.1.0140.1.0
mozilla/thunderbird< 128.13.0128.13.0
mozilla/thunderbird< 141.0141.0
mozilla/thunderbird≥ 140.0, < 140.1.0140.1.0
References (9)
https://bugzilla.mozilla.org/show_bug.cgi?id=1973990 · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-56/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-57/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-58/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-59/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-61/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-62/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-63/ · [email protected]https://lists.debian.org/debian-lts-announce/2025/07/msg00016.html · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 22 JUL 20:49Z
    Incorrect JavaScript state machine for generators
    cvelistv5