high 7.5

CVE-2024-7652 json

Type Confusion in Async Generators in Javascript Engine

published 2024-09-06 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-48538

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits: 0; none known

An error in the ECMA-262 specification relating to Async Generators could have resulted in a type confusion, potentially leading to memory corruption and an exploitable crash. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.

Patch / fix

fixed in 4 distros 5

Mozilla Firefox 128
Mozilla Firefox ESR 115.13
Mozilla Thunderbird 115.13, 128
mozilla firefox_esr 115.13

debian ubuntu red hat almalinux rocky linux

firefox-esr Debian 12 115.13.0esr-1~deb12u1
firefox-esr Debian 14, Debian 13 115.13.0esr-1
thunderbird Debian 12 1:115.13.0-1~deb12u1
thunderbird Debian 14, Debian 13 1:115.13.0-1

debian advisories DEBIAN-CVE-2024-7652

firefox Ubuntu 20.04 LTS 128.0+build2-0ubuntu0.20.04.1
thunderbird Ubuntu 20.04 LTS 1:115.13.0+build5-0ubuntu0.20.04.1
thunderbird Ubuntu 22.04 LTS 1:115.13.0+build5-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2024-7652

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

thunderbird RHEL 8 128.2.0-1.el8_10
thunderbird RHEL 9 128.2.0-1.el9_4
firefox RHEL 8 128.2.0-1.el8_10
firefox RHEL 9 128.2.0-1.el9_4
firefox-x11 RHEL 9 128.2.0-1.el9_4
thunderbird RHEL 8.2 AUS 128.2.0-1.el8_2
thunderbird RHEL 8.4 TUS, RHEL 8.4 E4S, RHEL 8.4 AUS 128.2.0-1.el8_4
thunderbird RHEL 9.0 E4S 128.2.0-1.el9_0

red hat advisories RHSA-2024:6723 RHSA-2024:6721 RHSA-2024:6722 RHSA-2024:6719 RHSA-2024:6892 RHSA-2024:6720

firefox AlmaLinux 9 128.2.0-1.el9_4.alma.1
firefox-x11 AlmaLinux 9 128.2.0-1.el9_4.alma.1
firefox AlmaLinux 8 128.2.0-1.el8_10.alma.1
thunderbird AlmaLinux 9 128.2.0-1.el9_4.alma.1
thunderbird AlmaLinux 8 128.2.0-1.el8_10.alma.1

almalinux advisories ALSA-2024:6681 ALSA-2024:6682 ALSA-2024:6683 ALSA-2024:6684

firefox Rocky Linux 9 128.2.0-1.el9_4.0.1
thunderbird Rocky Linux 9 128.2.0-1.el9_4.0.1
firefox Rocky Linux 8 128.2.0-1.el8_10
thunderbird Rocky Linux 8 128.2.0-1.el8_10

rocky linux advisories RLSA-2024:6681 RLSA-2024:6683 RLSA-2024:6682 RLSA-2024:6684

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-7652 updated 2026-11-04 cvss 8.6

mozilla: Type Confusion in Async Generators in Javascript Engine

Red Hat Enterprise Linux 6 firefox, thunderbird Red Hat Enterprise Linux 7 thunderbird
affected: workaround, no fix planned “Out of support scope”
Red Hat Enterprise Linux AppStream (v. 8) firefox 128.2.0-1.el8_10, thunderbird 128.2.0-1.el8_10
fixed: vendor fix RHSA-2024:6682
Red Hat Enterprise Linux AppStream (v. 9) firefox 128.2.0-1.el9_4, firefox-x11 128.2.0-1.el9_4, thunderbird 128.2.0-1.el9_4
fixed: vendor fix RHSA-2024:6681
Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 128.2.0-1.el8_2, thunderbird 128.2.0-1.el8_2
fixed: vendor fix RHSA-2024:6839
Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 128.2.0-1.el8_4, thunderbird 128.2.0-1.el8_4
fixed: vendor fix RHSA-2024:6891
Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox 128.2.0-1.el8_6
fixed: vendor fix RHSA-2024:6892
Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox 128.2.0-1.el8_4, thunderbird 128.2.0-1.el8_4
fixed: vendor fix RHSA-2024:6891
Red Hat Enterprise Linux AppStream E4S (v.8.6) firefox 128.2.0-1.el8_6
fixed: vendor fix RHSA-2024:6892

show 6 more

Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox 128.2.0-1.el9_0, thunderbird 128.2.0-1.el9_0
fixed: vendor fix RHSA-2024:6782
Red Hat Enterprise Linux AppStream EUS (v.8.8) firefox 128.2.0-1.el8_8, thunderbird 128.2.0-1.el8_8
fixed: vendor fix RHSA-2024:6850
Red Hat Enterprise Linux AppStream EUS (v.9.2) firefox 128.2.0-1.el9_2, firefox-x11 128.2.0-1.el9_2, thunderbird 128.2.0-1.el9_2
fixed: vendor fix RHSA-2024:6786
Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox 128.2.0-1.el8_4, thunderbird 128.2.0-1.el8_4
fixed: vendor fix RHSA-2024:6891
Red Hat Enterprise Linux AppStream TUS (v.8.6) firefox 128.2.0-1.el8_6, thunderbird 128.2.0-1.el8_6
fixed: vendor fix RHSA-2024:6892
Red Hat Enterprise Linux Server (v. 7 ELS) firefox 128.2.0-1.el7_9
fixed: vendor fix RHSA-2024:6838

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-09-06)

Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Mozilla Firefox
Mozilla Firefox ESR
Mozilla Thunderbird
mozilla firefox_esr

Classification

Weakness

CWE-843 Access of Resource Using Incompatible Type
CWE-476 NULL Pointer Dereference

References

mozilla.org /security/advisories/mfsa2024-29/
vendor-advisory
mozilla.org /security/advisories/mfsa2024-30/
vendor-advisory
mozilla.org /security/advisories/mfsa2024-31/
vendor-advisory
mozilla.org /security/advisories/mfsa2024-32/
vendor-advisory
bugzilla.mozilla.org /show_bug.cgi?id=1901411
issue-tracking
github.com /tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r
third-party-advisory

Sources

CVE List CVE-2024-7652
NVD CVE-2024-7652

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary