CVE-2026-8973
high
CVSS v3
8.8
CVSS v2
—
VIR risk
8.8
Description
Memory safety bugs present in Firefox 150. 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 151 and Thunderbird 151.
Predictions
Exploit likelihood
92%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-8973.html
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-8973
Vendor advisory: security@mozilla.org — https://www.mozilla.org/security/advisories/mfsa2026-50/
Vendor advisory: security@mozilla.org — https://www.mozilla.org/security/advisories/mfsa2026-46/
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | sid | fixed | 151.0-1 |
| sles | affected | |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| mozilla | firefox | {"endExcluding":"151.0.0"} | 151.0.0 |
| mozilla | thunderbird | {"endExcluding":"151.0.0"} | 151.0.0 |
References
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1362365%2C1860538%2C1929005%2C1983353%2C1998526%2C2023271%2C2023943%2C2024244%2C2024260%2C2024443%2C2024665%2C2024774%2C2024916%2C2025346%2C2025357%2C2025406%2C2025434%2C2025488%2C2025496%2C2025942%2C2025947%2C2025968%2C2026279%2C2027159%2C2027239%2C2027276%2C2027308%2C2027310%2C2027324%2C2027329%2C2027363%2C2027381%2C2027382%2C2027383%2C2028274%2C2028884%2C2029060%2C2029065%2C2029068%2C2029281%2C2029293%2C2029297%2C2029303%2C2029439%2C2029448%2C2029703%2C2029720%2C2029721%2C2029723%2C2029770%2C2029771%2C2029782%2C2029818%2C2029885%2C2030100%2C2030379%2C2030385%2C2030979%2C2031119%2C2031122%2C2034119%2C2034791%2C2035209%2C2036666%2C2037986
- https://www.mozilla.org/security/advisories/mfsa2026-46/
- https://www.mozilla.org/security/advisories/mfsa2026-50/
- https://security-tracker.debian.org/tracker/CVE-2026-8973
- https://www.suse.com/security/cve/CVE-2026-8973.html
CWEs
CWE-119
Verify integrity in audit chain (admin only). AS-IS.