Linux · Security advisory · February 25, 2026
DSA-6148-1: firefox-esr security update
DSA-6148-1, released February 25, 2026, fixes 1 CVE in firefox-esr. None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
1
None rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0059
48th percentile
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| firefox-esr | Debian 12.15 (bookworm) | 140.8.0esr-1~deb12u1 |
| firefox-esr | Debian 13.5 (trixie) | 140.8.0esr-1~deb13u1 |
CVEs this fix closes
| Priority | CVE | Title | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| High | CVE-2026-2757 | Incorrect boundary conditions in the WebRTC: Audio/Video component | 9.8 | 0.0059 | None reported |
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