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CVE details

CVE-2026-119141

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows malicious Wasm modules to panic the host because the may_leave flag is not cleared during realloc. Attackers can call into the host from realloc while lowering stream or future results, such as cancelling the active read or re-waiting a waitable-set, crashing the host.

Score
6.9 medium
Published
2026-10-29
Links
NVD · cve.org · Report wrong data

Matched ports (1)

PortPackageVersionStatusMaintainer
devel/libwasmtimelibwasmtime49.0.2_1unaddressedlongros@FreeBSD.org

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Check the version numbers before you commit this entry. Some ports share an entry in the CVE database with another port, such as sqlite2 and sqlite3. The version shown here may then be one that never existed for this port.

Ranges per package from the CVE rows that match this port, in pkg notation with the port's epoch and revision, every bound checked with pkg; one range per epoch the port actually had. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>libwasmtime -- FIXME</topic>
    <affects>
      <package>
	<name>libwasmtime</name>
	<!-- 49.0.3 is not released yet, newest upstream is 49.0.2 -->
	<range><ge>49.0.0</ge><lt>49.0.3</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>CVE-2026-119141: Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before
	  49.0.3 contains a denial of service vulnerability that allows
	  malicious Wasm modules to panic the host because the may_leave flag
	  is not cleared during realloc. Attackers can call into the host
	  from realloc while lowering stream or future results, such as
	  cancelling the active read or re-waiting a waitable-set, crashing
	  the host.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-119141</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-119141</url>
    </references>
    <dates>
      <discovery>2026-10-29</discovery>
      <entry>2026-10-29</entry>
    </dates>
  </vuln>