CVE Explorer
CVE-2026-34944
Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, On x86-64 platforms with SSE3 disabled Wasmtime's compilation of the f64x2.splat WebAssembly instruction with Cranelift may load 8 more bytes than is necessary. When signals-based-traps are disabled this can result in a uncaught segfault due to loading from unmapped guard pages. With guard pages disabled it's possible for out-of-sandbox data to be loaded, but this data is not visible to WebAssembly guests. This v
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"wasmtime","vendor":"bytecodealliance","versions":[{"status":"affected","version":"< 24.0.7"},{"status":"affected","version":">= 25.0.0, < 36.0.7"},{"status":"affected","version":">= 37.0.0, < 42.0.2"},{"status":"affected","version":">= 43.0.0, < 44.0.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:003ad923d181026a0172a1bae428272b5388d3e379f15e77cf0bcd6e9f3aea35 · sha256:bdc578450bfbb836… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":4.1,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:003ad923d181026a0172a1bae428272b5388d3e379f15e77cf0bcd6e9f3aea35 · sha256:bdc578450bfbb836… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-248","description":"CWE-248: Uncaught Exception","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:003ad923d181026a0172a1bae428272b5388d3e379f15e77cf0bcd6e9f3aea35 · sha256:bdc578450bfbb836… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-qqfj-4vcm-26hv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-qqfj-4vcm-26hv"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:003ad923d181026a0172a1bae428272b5388d3e379f15e77cf0bcd6e9f3aea35 · sha256:bdc578450bfbb836… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.