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CVE-2026-24116

Wasmtime is a runtime for WebAssembly. Starting in version 29.0.0 and prior to version 36.0.5, 40.0.3, and 41.0.1, on x86-64 platforms with AVX, Wasmtime's compilation of the `f64.copysign` 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 unless there is another bug i
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:07cdcfad0b1042795135906e9925b354000a945a56eac0a1a79a4678b79ebf6e
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":">= 29.0.0, < 36.0.5"},{"status":"affected","version":">= 37.0.0, < 40.0.3"},{"status":"affected","version":"= 41.0.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8fd8003753703407e39f468a730d19f0a755d4174a72d52a6f0091bedb1719e7 · sha256:9c451ae38c8493fb… · /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_v5cvss
    urn:baitaphish:normalized-source-record:v2:8fd8003753703407e39f468a730d19f0a755d4174a72d52a6f0091bedb1719e7 · sha256:9c451ae38c8493fb… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8fd8003753703407e39f468a730d19f0a755d4174a72d52a6f0091bedb1719e7 · sha256:9c451ae38c8493fb… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"name":"https://docs.rs/wasmtime/latest/wasmtime/struct.Config.html#method.memory_guard_size","tags":["x_refsource_MISC"],"url":"https://docs.rs/wasmtime/latest/wasmtime/struct.Config.html#method.memory_guard_size"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8fd8003753703407e39f468a730d19f0a755d4174a72d52a6f0091bedb1719e7 · sha256:9c451ae38c8493fb… · /containers/cna/references/4
{"name":"https://docs.rs/wasmtime/latest/wasmtime/struct.Config.html#method.signals_based_traps","tags":["x_refsource_MISC"],"url":"https://docs.rs/wasmtime/latest/wasmtime/struct.Config.html#method.signals_based_traps"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8fd8003753703407e39f468a730d19f0a755d4174a72d52a6f0091bedb1719e7 · sha256:9c451ae38c8493fb… · /containers/cna/references/5
{"name":"https://docs.wasmtime.dev/stability-release.html","tags":["x_refsource_MISC"],"url":"https://docs.wasmtime.dev/stability-release.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8fd8003753703407e39f468a730d19f0a755d4174a72d52a6f0091bedb1719e7 · sha256:9c451ae38c8493fb… · /containers/cna/references/6
{"name":"https://github.com/bytecodealliance/wasmtime/commit/728fa07184f8da2a046f48ef9b61f869dce133a6","tags":["x_refsource_MISC"],"url":"https://github.com/bytecodealliance/wasmtime/commit/728fa07184f8da2a046f48ef9b61f869dce133a6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8fd8003753703407e39f468a730d19f0a755d4174a72d52a6f0091bedb1719e7 · sha256:9c451ae38c8493fb… · /containers/cna/references/1
{"name":"https://github.com/bytecodealliance/wasmtime/commit/799585fc362fcb991de147dd1a9f2ba0861ed440","tags":["x_refsource_MISC"],"url":"https://github.com/bytecodealliance/wasmtime/commit/799585fc362fcb991de147dd1a9f2ba0861ed440"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8fd8003753703407e39f468a730d19f0a755d4174a72d52a6f0091bedb1719e7 · sha256:9c451ae38c8493fb… · /containers/cna/references/2
{"name":"https://github.com/bytecodealliance/wasmtime/commit/ac92d9bb729ad3a6d93f0724c4c33a0c4a9c0227","tags":["x_refsource_MISC"],"url":"https://github.com/bytecodealliance/wasmtime/commit/ac92d9bb729ad3a6d93f0724c4c33a0c4a9c0227"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8fd8003753703407e39f468a730d19f0a755d4174a72d52a6f0091bedb1719e7 · sha256:9c451ae38c8493fb… · /containers/cna/references/3
{"name":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-vc8c-j3xm-xj73","tags":["x_refsource_CONFIRM"],"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-vc8c-j3xm-xj73"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8fd8003753703407e39f468a730d19f0a755d4174a72d52a6f0091bedb1719e7 · sha256:9c451ae38c8493fb… · /containers/cna/references/0
{"name":"https://rustsec.org/advisories/RUSTSEC-2026-0006.html","tags":["x_refsource_MISC"],"url":"https://rustsec.org/advisories/RUSTSEC-2026-0006.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8fd8003753703407e39f468a730d19f0a755d4174a72d52a6f0091bedb1719e7 · sha256:9c451ae38c8493fb… · /containers/cna/references/7

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.

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