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 affects Firefox < 136, Firefox ESR < 115.21, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
{ "availability": "No subscription required", "binaries": [ { "binary_version": "136.0+build3-0ubuntu0.20.04.1", "binary_name": "firefox" }, { "binary_version": "136.0+build3-0ubuntu0.20.04.1", "binary_name": "firefox-dev" }, { "binary_version": "136.0+build3-0ubuntu0.20.04.1", "binary_name": "firefox-geckodriver" }, { "binary_version": "136.0+build3-0ubuntu0.20.04.1", "binary_name": "firefox-mozsymbols" } ] }
{ "availability": "No subscription required", "binaries": [ { "binary_version": "1:128.12.0+build1-0ubuntu0.22.04.1", "binary_name": "thunderbird" }, { "binary_version": "1:128.12.0+build1-0ubuntu0.22.04.1", "binary_name": "thunderbird-dev" }, { "binary_version": "1:128.12.0+build1-0ubuntu0.22.04.1", "binary_name": "thunderbird-gnome-support" }, { "binary_version": "1:128.12.0+build1-0ubuntu0.22.04.1", "binary_name": "thunderbird-mozsymbols" }, { "binary_version": "1:128.12.0+build1-0ubuntu0.22.04.1", "binary_name": "xul-ext-calendar-timezones" }, { "binary_version": "1:128.12.0+build1-0ubuntu0.22.04.1", "binary_name": "xul-ext-gdata-provider" }, { "binary_version": "1:128.12.0+build1-0ubuntu0.22.04.1", "binary_name": "xul-ext-lightning" } ] }