CVE-2025-1937: Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8

Published Mar 4, 2025
·
Updated

Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7. 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 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

Other sources

Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7. 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 affects Firefox < 136, Firefox ESR < 115.21, and Firefox ESR < 128.8.

— Red Hat

Affected Software

27 affected componentsFixes available
Mozilla Firefox<136
Mozilla Firefox ESR<115.21, <128.8
Mozilla Thunderbird<136
Mozilla Firefox ESR<115.21
115.21
Mozilla Thunderbird<136
136
Mozilla Firefox<115.21.0
Mozilla Firefox<128.8.0
Mozilla Firefox<135.0
Mozilla Thunderbird<128.8.0
Mozilla Thunderbird>=129.0<136.0
Mozilla Thunderbird<128.8
128.8
ubuntu/mozjs52*
ubuntu/mozjs38*
ubuntu/firefox<136.0+build3-0ubuntu0.20.04.1
136.0+build3-0ubuntu0.20.04.1
ubuntu/mozjs68*
ubuntu/mozjs52*
ubuntu/mozjs102*
ubuntu/mozjs78*
ubuntu/mozjs91*
ubuntu/thunderbird<1:128.12.0+build1-0ubuntu0.22.04.1
1:128.12.0+build1-0ubuntu0.22.04.1
ubuntu/mozjs102*
ubuntu/mozjs115*
Mozilla Firefox ESR<128.8
128.8
Mozilla Firefox<136
136
debian/firefox
159.0.1-1
debian/firefox-esr
140.12.0esr-1~deb12u1153.6.0esr-1~deb12u2140.15.0esr-1~deb13u1153.6.0esr-1~deb13u1153.5.1esr-1153.6.0esr-1
debian/thunderbird
1:140.12.0esr-1~deb12u11:153.6.0esr-1~deb12u21:140.12.0esr-1~deb13u11:153.6.0esr-1~deb13u11:153.5.0esr-11:153.6.0esr-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 115.21
  2. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 136
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 128.8
  4. Upgrade

    Upgrade ubuntu/firefox to a version that resolves this vulnerability.

    Fixed in 136.0+build3-0ubuntu0.20.04.1
  5. Upgrade

    Upgrade ubuntu/thunderbird to a version that resolves this vulnerability.

    Fixed in 1:128.12.0+build1-0ubuntu0.22.04.1
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 136
  7. Upgrade

    Upgrade debian/firefox to a version that resolves this vulnerability.

    Fixed in 159.0.1-1
  8. Upgrade

    Upgrade debian/firefox-esr to a version that resolves this vulnerability.

    Fixed in 140.12.0esr-1~deb12u1Fixed in 153.6.0esr-1~deb12u2Fixed in 140.15.0esr-1~deb13u1Fixed in 153.6.0esr-1~deb13u1Fixed in 153.5.1esr-1Fixed in 153.6.0esr-1
  9. Upgrade

    Upgrade debian/thunderbird to a version that resolves this vulnerability.

    Fixed in 1:140.12.0esr-1~deb12u1Fixed in 1:153.6.0esr-1~deb12u2Fixed in 1:140.12.0esr-1~deb13u1Fixed in 1:153.6.0esr-1~deb13u1Fixed in 1:153.5.0esr-1Fixed in 1:153.6.0esr-1
  10. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 136
  11. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 128.8
  12. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 128.8

Event History

Mar 4, 2025
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
CVE Published
via MITRE·01:31 PM
Data Sourced
via MITRE·01:31 PM
Description
Data Sourced
via Red Hat·02:01 PM
DescriptionSeverityAffected Software
Data Sourced
via OSV·02:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·02:15 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2025-1937?

CVE-2025-1937 is considered a high severity vulnerability due to potential memory corruption that could allow arbitrary code execution.

2

How do I fix CVE-2025-1937?

To fix CVE-2025-1937, update Mozilla Firefox to version 136, Mozilla Firefox ESR to version 115.21 or 128.8, or update Mozilla Thunderbird to version 136.

3

What are the affected products for CVE-2025-1937?

The affected products for CVE-2025-1937 include Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7.

4

Is CVE-2025-1937 easy to exploit?

While CVE-2025-1937 shows evidence of memory corruption, exploiting it to run arbitrary code would require significant effort.

5

What types of vulnerabilities does CVE-2025-1937 involve?

CVE-2025-1937 involves memory safety bugs that can lead to memory corruption in the software.

Company

Resources

Contact

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