CVE-2026-122330
Blosc c-blosc2 before 3.5.0 contains a divide-by-zero vulnerability in blosc2_schunk_get_slice_buffer() in blosc/schunk.c that allows attackers to crash applications by supplying crafted frames with unchecked zero chunksize or blocksize values. Attackers can provide a malicious Blosc2 frame opened via blosc2_schunk_open() or blosc2_schunk_from_buffer() and read as a slice, raising SIGFPE and terminating the process.
- Score
- 6.8 medium
- Published
- 2026-11-05
- Links
- NVD · cve.org · Report wrong data
Matched ports (1)
| Port | Package | Version | Status | Maintainer |
|---|---|---|---|---|
| archivers/c-blosc2 | c-blosc2 | 2.23.1 | unaddressed | sunpoet@FreeBSD.org |
Template for a VuXML entry
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.
Not finished: this entry still needs a checked upper bound for every package. Do not commit it as it is.
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>c-blosc2 -- FIXME</topic>
<affects>
<package>
<name>c-blosc2</name>
<!-- no fixed release for the 2 line in the CVE record (fixed in 3.5.0) -->
<range><lt>FIXME</lt></range>
</package>
</affects>
<description>
<body xmlns="http://www.w3.org/1999/xhtml">
<p>CVE-2026-122330: Blosc c-blosc2 before 3.5.0 contains a divide-by-zero
vulnerability in blosc2_schunk_get_slice_buffer() in blosc/schunk.c
that allows attackers to crash applications by supplying crafted
frames with unchecked zero chunksize or blocksize values. Attackers
can provide a malicious Blosc2 frame opened via
blosc2_schunk_open() or blosc2_schunk_from_buffer() and read as a
slice, raising SIGFPE and terminating the process.</p>
</body>
</description>
<references>
<cvename>CVE-2026-122330</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2026-122330</url>
</references>
<dates>
<discovery>2026-11-05</discovery>
<entry>2026-11-05</entry>
</dates>
</vuln>