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CVE-2025-1938— Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8

Quick assessment

Affected
Mozilla Firefox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mozilla Firefox等都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox ESR是Firefox(Web浏览器)的一个延长支持版本。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。 Mozilla多款产品存在缓冲区错误漏洞，该漏洞源于内存损坏，可能导致任意代码执行。以下产品及版本受到影响：Firefox 136之前版本、Firefox ESR 128

AI Predicted 8.1 Difficulty: Hard EPSS 0.33% · P25
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I. Basic Information for CVE-2025-1938

Vulnerability Information
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Vulnerability Title
Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8
Source: CVE Program / CVE List V5
Vulnerability Description
Memory safety bugs present in Firefox 135, Thunderbird 135, 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 128.8, Thunderbird 136, and Thunderbird 128.8.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mozilla多款产品 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox等都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox ESR是Firefox(Web浏览器)的一个延长支持版本。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。 Mozilla多款产品存在缓冲区错误漏洞，该漏洞源于内存损坏，可能导致任意代码执行。以下产品及版本受到影响：Firefox 136之前版本、Firefox ESR 128
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mozilla Firefox 128.8 ~ 128.* -
Mozilla Thunderbird 128.8 ~ 128.* -

II. Public POCs for CVE-2025-1938

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III. Intelligence Information for CVE-2025-1938

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Vendor Advisories for CVE-2025-1938 (5)

Same Patch Batch · Mozilla · 2025-03-04 · 17 CVEs total

CVE-2025-27425 QR code user confirmation bypass with invalid protocol
CVE-2025-27426 Firefox Mobile iOS Full Address Bar Spoof Using Server-Side Redirect to internal error pag
CVE-2025-27424 Firefox Mobile iOS Address Bar Spoof Using Server-Side Redirect to non-http Scheme
CVE-2025-1943 Memory safety bugs fixed in Firefox 136 and Thunderbird 136
CVE-2025-1937 Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR
CVE-2025-1935 Clickjacking the registerProtocolHandler info-bar
CVE-2025-1942 Disclosure of uninitialized memory when .toUpperCase() causes string to get longer
CVE-2025-1936 Adding %00 and a fake extension to a jar: URL changed the interpretation of the contents
CVE-2025-1941 Lock screen setting bypass in Firefox Focus for Android
CVE-2025-1934 Unexpected GC during RegExp bailout processing
CVE-2025-1932 Inconsistent comparator in XSLT sorting led to out-of-bounds access
CVE-2025-1940 Android Intent confirmation prompt tapjacking using Select options
CVE-2025-1933 JIT corruption of WASM i32 return values on 64-bit CPUs
CVE-2025-1931 Use-after-free in WebTransportChild
CVE-2025-1939 Tapjacking in Android Custom Tabs using transition animations
CVE-2025-1930 AudioIPC StreamData could trigger a use-after-free in the Browser process

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2025-1938

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