Memory safety bugs fixed in Firefox 148 and Thunderbird 148
Published Feb 24, 2026
9.8
CRITICALCVSS 3.1
EPSS 0.48%
Description
Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 148 and Thunderbird 148.
Affected products
No data.
- < 148.0
- < 148.0
No data.
Red Hat Enterprise Linux 10
firefox
Not affected
Red Hat Enterprise Linux 10
rhel10/firefox-flatpak
Not affected
Red Hat Enterprise Linux 10
rhel10/thunderbird-flatpak
Not affected
Red Hat Enterprise Linux 10
thunderbird
Not affected
Red Hat Enterprise Linux 6
firefox
Not affected
Red Hat Enterprise Linux 6
thunderbird
Not affected
Red Hat Enterprise Linux 7
firefox
Not affected
Red Hat Enterprise Linux 7
thunderbird
Not affected
Red Hat Enterprise Linux 8
firefox
Not affected
Red Hat Enterprise Linux 8
thunderbird
Not affected
Red Hat Enterprise Linux 9
firefox
Not affected
Red Hat Enterprise Linux 9
thunderbird
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 10 | rhel10/firefox-flatpak | Not affected | n/a |
| Red Hat Enterprise Linux 10 | rhel10/thunderbird-flatpak | Not affected | n/a |
| Red Hat Enterprise Linux 10 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 6 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 6 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 7 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 7 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 8 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 8 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 9 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 9 | thunderbird | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
References (10)
- https://access.redhat.com/security/cve/CVE-2026-2807 Vendor Advisory
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1756056%2C1999402%2C2004872%2C2006037%2C2012855 Broken Link
- https://bugzilla.redhat.com/show_bug.cgi?id=2442296 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2026-2807
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2807.json
- https://www.cve.org/CVERecord?id=CVE-2026-2807
- https://www.mozilla.org/security/advisories/mfsa2026-13/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-13/#CVE-2026-2807
- https://www.mozilla.org/security/advisories/mfsa2026-16/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-16/#CVE-2026-2807
Change history (0)
No recorded changes yet.