{"id":"CVE-2026-122330","published":"2026-11-05T16:17:46.197","lastModified":"2026-11-05T21:18:44.943","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.","cvssScore":5.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwes":["CWE-369"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Blosc/c-blosc2","tags":[]},{"url":"https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/frame.c#L1214-L1227","tags":[]},{"url":"https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/schunk.c#L1662-L1700","tags":[]},{"url":"https://github.com/Blosc/c-blosc2/commit/4fff1787408d94b895c6f9cb50f7925ad5919052","tags":[]},{"url":"https://github.com/Blosc/c-blosc2/issues/834","tags":[]},{"url":"https://hackmd.io/@haindpwn/c-blosc2-schunk-slice-divide-by-zero","tags":[]},{"url":"https://www.vulncheck.com/advisories/blosc-c-blosc2-before-3.5.0-divide-by-zero-via-blosc2-schunk-get-slice-buffer","tags":[]},{"url":"https://hackmd.io/@haindpwn/cve-2026-122330-c-blosc2-schunk-slice-divide-by-zero","tags":[]}],"exploitRefs":[{"url":"https://github.com/Blosc/c-blosc2","tags":[]},{"url":"https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/frame.c#L1214-L1227","tags":[]},{"url":"https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/schunk.c#L1662-L1700","tags":[]},{"url":"https://github.com/Blosc/c-blosc2/commit/4fff1787408d94b895c6f9cb50f7925ad5919052","tags":[]},{"url":"https://github.com/Blosc/c-blosc2/issues/834","tags":[]}],"hasPoc":true,"ai":null}