CVE-2025-8027

MEDIUM

6.5

CVSS v3

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.

CWE-457

How to fix

Remediation Available

firefoxDebian

Fixed in:141.0-1CVE-2025-8027

firefoxRocky

Fixed in:0:128.13.0-1.el10_0RHSA-2025:11797

Fixed in:0:128.13.0-1.el7_9RHSA-2025:12278

Fixed in:0:128.13.0-1.el8_4RHSA-2025:12302

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el8_4RHSA-2025:12302

Fixed in:0:128.13.0-1.el8_10RHSA-2025:11747

Fixed in:0:128.13.0-1.el8_2RHSA-2025:12353

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el8_8RHSA-2025:12360

Fixed in:0:128.13.0-1.el8_2RHSA-2025:12353

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el8_8RHSA-2025:12360

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

firefoxRed Hat / RHEL

Fixed in:0:128.13.0-1.el10_0RHSA-2025:11797

Fixed in:0:128.13.0-1.el7_9RHSA-2025:12278

Fixed in:0:128.13.0-1.el8_10RHSA-2025:11747

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el8_4RHSA-2025:12302

Fixed in:0:128.13.0-1.el8_10RHSA-2025:11747

Fixed in:0:128.13.0-1.el8_8RHSA-2025:12360

Fixed in:0:128.13.0-1.el8_2RHSA-2025:12353

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

firefox-debuginfoRed Hat / RHEL

Fixed in:0:128.13.0-1.el10_0RHSA-2025:11797

Fixed in:0:128.13.0-1.el7_9RHSA-2025:12278

Fixed in:0:128.13.0-1.el8_8RHSA-2025:12360

Fixed in:0:128.13.0-1.el8_2RHSA-2025:12353

Fixed in:0:128.13.0-1.el8_10RHSA-2025:11747

Fixed in:0:128.13.0-1.el8_4RHSA-2025:12302

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

firefox-debuginfoRocky

Fixed in:0:128.13.0-1.el10_0RHSA-2025:11797

Fixed in:0:128.13.0-1.el7_9RHSA-2025:12278

Fixed in:0:128.13.0-1.el8_10RHSA-2025:11747

Fixed in:0:128.13.0-1.el8_8RHSA-2025:12360

Fixed in:0:128.13.0-1.el8_2RHSA-2025:12353

Fixed in:0:128.13.0-1.el8_10RHSA-2025:11747

Fixed in:0:128.13.0-1.el8_4RHSA-2025:12302

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

firefox-debugsourceRed Hat / RHEL

Fixed in:0:128.13.0-1.el10_0RHSA-2025:11797

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el8_10RHSA-2025:11747

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el8_4RHSA-2025:12302

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el8_10RHSA-2025:11747

Fixed in:0:128.13.0-1.el8_8RHSA-2025:12360

Fixed in:0:128.13.0-1.el8_2RHSA-2025:12353

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

firefox-debugsourceRocky

Fixed in:0:128.13.0-1.el10_0RHSA-2025:11797

Fixed in:0:128.13.0-1.el8_4RHSA-2025:12302

Fixed in:0:128.13.0-1.el8_10RHSA-2025:11747

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el8_10RHSA-2025:11747

Fixed in:0:128.13.0-1.el8_6RHSA-2025:12361

Fixed in:0:128.13.0-1.el8_10RHSA-2025:11747

Fixed in:0:128.13.0-1.el8_2RHSA-2025:12353

Fixed in:0:128.13.0-1.el8_8RHSA-2025:12360

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_0RHSA-2025:12046

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

firefox-x11Red Hat / RHEL

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

firefox-x11Rocky

Fixed in:0:128.13.0-1.el9_4RHSA-2025:12044

Fixed in:0:128.13.0-1.el9_6RHSA-2025:11748

Fixed in:0:128.13.0-1.el9_2RHSA-2025:12045

thunderbirdRocky

Fixed in:0:128.13.0-3.el10_0RHSA-2025:12188

Fixed in:0:128.13.0-3.el8_6RHSA-2025:13651

Fixed in:0:128.13.0-3.el8_8RHSA-2025:13650

Fixed in:0:128.13.0-3.el8_10RHSA-2025:13676

Fixed in:0:128.13.0-3.el8_8RHSA-2025:13650

Fixed in:0:128.13.0-3.el8_2RHSA-2025:13645

Fixed in:0:128.13.0-3.el8_4RHSA-2025:13646

Fixed in:0:128.13.0-3.el8_8RHSA-2025:13650

Fixed in:0:128.13.0-3.el8_6RHSA-2025:13651

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

thunderbirdRed Hat / RHEL

Fixed in:0:128.13.0-3.el10_0RHSA-2025:12188

Fixed in:0:128.13.0-3.el8_8RHSA-2025:13650

Fixed in:0:128.13.0-3.el8_10RHSA-2025:13676

Fixed in:0:128.13.0-3.el8_2RHSA-2025:13645

Fixed in:0:128.13.0-3.el8_4RHSA-2025:13646

Fixed in:0:128.13.0-3.el8_6RHSA-2025:13651

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

thunderbird-debuginfoRed Hat / RHEL

Fixed in:0:128.13.0-3.el10_0RHSA-2025:12188

Fixed in:0:128.13.0-3.el8_10RHSA-2025:13676

Fixed in:0:128.13.0-3.el8_2RHSA-2025:13645

Fixed in:0:128.13.0-3.el8_10RHSA-2025:13676

Fixed in:0:128.13.0-3.el8_4RHSA-2025:13646

Fixed in:0:128.13.0-3.el8_8RHSA-2025:13650

Fixed in:0:128.13.0-3.el8_6RHSA-2025:13651

Fixed in:0:128.13.0-3.el8_8RHSA-2025:13650

Fixed in:0:128.13.0-3.el8_6RHSA-2025:13651

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

thunderbird-debuginfoRocky

Fixed in:0:128.13.0-3.el10_0RHSA-2025:12188

Fixed in:0:128.13.0-3.el8_6RHSA-2025:13651

Fixed in:0:128.13.0-3.el8_2RHSA-2025:13645

Fixed in:0:128.13.0-3.el8_6RHSA-2025:13651

Fixed in:0:128.13.0-3.el8_10RHSA-2025:13676

Fixed in:0:128.13.0-3.el8_6RHSA-2025:13651

Fixed in:0:128.13.0-3.el8_10RHSA-2025:13676

Fixed in:0:128.13.0-3.el8_8RHSA-2025:13650

Fixed in:0:128.13.0-3.el8_10RHSA-2025:13676

Fixed in:0:128.13.0-3.el8_8RHSA-2025:13650

Fixed in:0:128.13.0-3.el8_4RHSA-2025:13646

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

thunderbird-debugsourceRocky

Fixed in:0:128.13.0-3.el10_0RHSA-2025:12188

Fixed in:0:128.13.0-3.el8_6RHSA-2025:13651

Fixed in:0:128.13.0-3.el8_8RHSA-2025:13650

Fixed in:0:128.13.0-3.el8_6RHSA-2025:13651

Fixed in:0:128.13.0-3.el8_8RHSA-2025:13650

Fixed in:0:128.13.0-3.el8_4RHSA-2025:13646

Fixed in:0:128.13.0-3.el8_2RHSA-2025:13645

Fixed in:0:128.13.0-3.el8_10RHSA-2025:13676

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

thunderbird-debugsourceRed Hat / RHEL

Fixed in:0:128.13.0-3.el10_0RHSA-2025:12188

Fixed in:0:128.13.0-3.el8_10RHSA-2025:13676

Fixed in:0:128.13.0-3.el8_6RHSA-2025:13651

Fixed in:0:128.13.0-3.el8_4RHSA-2025:13646

Fixed in:0:128.13.0-3.el8_2RHSA-2025:13645

Fixed in:0:128.13.0-3.el8_10RHSA-2025:13676

Fixed in:0:128.13.0-3.el8_8RHSA-2025:13650

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_2RHSA-2025:13648

Fixed in:0:128.13.0-3.el9_6RHSA-2025:12187

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

Fixed in:0:128.13.0-3.el9_4RHSA-2025:13649

Fixed in:0:128.13.0-3.el9_0RHSA-2025:13647

thunderbirdUbuntu

Fixed in:1:140.7.1+build1-0ubuntu0.22.04.1USN-7991-1

DeveloperEditionWindows application

Affected:115.26.0Fixed in:115.26.0Mozilla

Affected:140.0 140.1.0Fixed in:140.1.0Mozilla

Affected:128.0 128.13.0Fixed in:128.13.0Mozilla

Affected:141.0Fixed in:141.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:140.0 140.1.0Fixed in:140.1.0Mozilla

Affected:128.0 128.13.0Fixed in:128.13.0Mozilla

Affected:115.26.0Fixed in:115.26.0Mozilla

Affected:141.0Fixed in:141.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:141.0Fixed in:141.0Mozilla

Affected:140.0 140.1.0Fixed in:140.1.0Mozilla

Affected:128.13.0Fixed in:128.13.0Mozilla

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Exploit Intelligence

0.35%probability of exploitation in 30 days

28thpercentile

Low risk: more likely to be exploited than 28% of all known CVEs.

References

Vendor Advisory7

Other references2

Related Vulnerabilities

Other CWE-457 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2009-0901	High	8.8	37%	-	-
CVE-2021-40418	Critical	9.8	18%	-	-
CVE-2019-11038	Medium	5.3	4.3%	-	Fix
CVE-2021-31435	High	7.8	2.8%	-	-
CVE-2021-46570	High	7.8	2.1%	-	Fix

Common questions

How do I fix CVE-2025-8027?

Published advisories record a fix for 19 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2025-8027 being actively exploited?

Not that we know of. CVE-2025-8027 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.35% is the estimated probability that it will be exploited in the next 30 days. That is higher than 28% of all scored CVEs.

How severe is CVE-2025-8027?

CVE-2025-8027 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2025-8027 affect?

Published advisories record a fix for firefox (Debian), firefox (Rocky), firefox (Red Hat / RHEL), firefox-debuginfo (Red Hat / RHEL), and 15 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2025-8027

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-13.