GHSA-99fx-294r-j6xwMediumCVSS 5.5
Blosc c-blosc2 before 3.5.0 contains a divide-by-zero vulnerability in...
🔗 CVE IDs covered (1)
📋 Description
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.
🔗 References (10)
- https://nvd.nist.gov/vuln/detail/CVE-2026-122330
- https://github.com/Blosc/c-blosc2/issues/834
- https://github.com/Blosc/c-blosc2/commit/4fff1787408d94b895c6f9cb50f7925ad5919052
- https://github.com/Blosc/c-blosc2
- https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/frame.c#L1214-L1227
- https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/schunk.c#L1662-L1700
- https://hackmd.io/@haindpwn/c-blosc2-schunk-slice-divide-by-zero
- https://www.vulncheck.com/advisories/blosc-c-blosc2-before-3.5.0-divide-by-zero-via-blosc2-schunk-get-slice-buffer
- https://hackmd.io/@haindpwn/cve-2026-122330-c-blosc2-schunk-slice-divide-by-zero
- https://github.com/advisories/GHSA-99fx-294r-j6xw