CVE-2025-8027
thunderbird - security update
6.5
MEDIUM
CVSS 3.1
EPSS 0.49%
Description
On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
How to fix CVE-2025-8027
To remediate CVE-2025-8027, upgrade the affected package to a fixed version below.
- —upgrade to 128.13.0esr-1~deb11u1 or later
- —upgrade to 128.13.0esr-1~deb11u1 or later
- —upgrade to 128.13.0esr-1~deb12u1 or later
- —upgrade to 1:128.13.0esr-1~deb11u1 or later
- —upgrade to 1:128.13.0esr-1~deb11u1 or later
- —upgrade to 1:128.13.0esr-1~deb12u1 or later
Is CVE-2025-8027 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 128.13.0esr-1~deb11u1
- from 0, < 128.13.0esr-1~deb11u1
- from 0, < 128.13.0esr-1~deb12u1
- from 0, < 1:128.13.0esr-1~deb11u1
- from 0, < 1:128.13.0esr-1~deb11u1
- from 0, < 1:128.13.0esr-1~deb12u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |