Linux · Security advisory · September 19, 2025
DLA-4305-1: firefox-esr security update
DLA-4305-1, released September 19, 2025, fixes 1 CVE in firefox-esr (version 140.3.0esr-1~deb11u2). None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.
HighUnsupported product
CVEs closed
1
None rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0029
21st percentile
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| firefox-esr | Debian 11.6 (bullseye) | 140.3.0esr-1~deb11u2 |
CVEs this fix closes
| Priority | CVE | Title | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| High | CVE-2025-10527 | Sandbox escape due to use-after-free in the Graphics: Canvas2D component | 7.5 | 0.0029 | None reported |
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