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ALSA-2025:2452 — Important: firefox security update

2026-10-06T16:56:57.948800+00:00

Affected: AlmaLinux:8: firefox

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

* firefox: Use-after-free in WebTransportChild (CVE-2025-1931) * firefox: AudioIPC StreamData could trigger a use-after-free in the Browser process (CVE-2025-1930) * firefox: Unexpected GC during RegExp bailout processing (CVE-2025-1934) * firefox: Clickjacking the registerProtocolHandler info-bar Reporter (CVE-2025-1935) * firefox: thunderbird: Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8 (CVE-2025-1938) * firefox: JIT corruption of WASM i32 return values on 64-bit CPUs (CVE-2025-1933) * firefox: thunderbird: Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8 (CVE-2025-1937) * firefox: Inconsistent comparator in XSLT sorting led to out-of-bounds access (CVE-2025-1932) * firefox: Adding %00 and a fake extension to a jar: URL changed the interpretation of the contents (CVE-2025-1936)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

CVE-2025-1933 — JIT corruption of WASM i32 return values on 64-bit CPUs

2026-10-06T16:56:57.948864+00:00

Affected: Mozilla Firefox, Mozilla Thunderbird

On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

RHSA-2025:2452 — Red Hat Security Advisory: firefox security update

2026-10-06T16:56:57.948896+00:00

firefox: AudioIPC StreamData could trigger a use-after-free in the Browser process firefox: Use-after-free in WebTransportChild firefox: Inconsistent comparator in XSLT sorting led to out-of-bounds access firefox: JIT corruption of WASM i32 return values on 64-bit CPUs firefox: Unexpected GC during RegExp bailout processing firefox: Clickjacking the registerProtocolHandler info-bar Reporter firefox: Adding %00 and a fake extension to a jar: URL changed the interpretation of the contents firefox: thunderbird: Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8 firefox: thunderbird: Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8

USN-7334-1 — firefox vulnerabilities

2026-10-06T16:56:57.948928+00:00

Affected: Ubuntu:20.04:LTS: firefox

Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across domains, or execute arbitrary code. (CVE-2025-1933, CVE-2025-1934, CVE-2025-1935, CVE-2025-1936, CVE-2025-1937, CVE-2025-1942)

It was discovered that Firefox did not properly handle WebTransport connection, leading to a use-after-free vulnerability. An attacker could potentially exploit this issue to cause a denial of service. (CVE-2025-1931)

Ivan Fratric discovered that Firefox did not properly handle XSLT sorting, leading to a out-of-bounds access vulnerability. An attacker could potentially exploit this issue to cause a denial of service, or execute arbitrary code. (CVE-2025-1932)