Description
During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable crash. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.
References (9)
Core 9
Core References
Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1851599
Mailing List, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00034.html
Mailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00015.html
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/AY642Z6JZODQJE7Z62CFREVUHEGCXGPD/
Patch, Third Party Advisory
https://www.debian.org/security/2023/dsa-5506
Third Party Advisory
https://www.debian.org/security/2023/dsa-5513
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-41/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-42/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-43/
Scores
CVSS v3
6.5
EPSS
0.0026
EPSS Percentile
49.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-416
Status
published
Products (7)
debian/debian_linux
10.0
debian/debian_linux
11.0
debian/debian_linux
12.0
fedoraproject/fedora
39
mozilla/firefox
< 118
mozilla/firefox_esr
< 115.3
mozilla/thunderbird
< 115.3
Published
Sep 27, 2023
Tracked Since
Feb 18, 2026