{"id":"CVE-2026-122330","summary":"Blosc c-blosc2 before 3.5.0 Divide-by-Zero via blosc2_schunk_get_slice_buffer()","details":"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.","modified":"2026-11-05T21:32:22.920655146Z","published":"2026-11-05T15:11:48.557Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-369"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122330.json"},"references":[{"type":"PACKAGE","url":"https://github.com/Blosc/c-blosc2"},{"type":"ARTICLE","url":"https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/frame.c#L1214-L1227"},{"type":"ARTICLE","url":"https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/schunk.c#L1662-L1700"},{"type":"FIX","url":"https://github.com/Blosc/c-blosc2/commit/4fff1787408d94b895c6f9cb50f7925ad5919052"},{"type":"REPORT","url":"https://github.com/Blosc/c-blosc2/issues/834"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122330.json"},{"type":"ADVISORY","url":"https://hackmd.io/@haindpwn/c-blosc2-schunk-slice-divide-by-zero"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-122330"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/blosc-c-blosc2-before-3.5.0-divide-by-zero-via-blosc2-schunk-get-slice-buffer"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/blosc/c-blosc2","events":[{"introduced":"0"},{"fixed":"4d35a0dbeee037c0c724a96a8e5ed9b07c31b67f"},{"fixed":"4fff1787408d94b895c6f9cb50f7925ad5919052"}],"database_specific":{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"0"},{"fixed":"3.5.0"}],"source":"AFFECTED_FIELD"},{"range":[{"fixed":"4fff1787408d94b895c6f9cb50f7925ad5919052"}],"source":"REFERENCES_COMMIT"}]}}],"versions":["v3.4.1","v3.4.0","v3.3.5","v3.3.4","v3.3.3","v3.3.2","v3.3.1","v3.3.0","v3.2.3","v3.2.2","v3.2.1","v3.2.0","v3.1.5","v3.1.4","v3.1.3","v3.1.2","v3.1.1","v3.1.0","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v3.0.0.rc2","v3.0.0.rc1","v2.23.1","v2.23.0","v2.22.0","v2.21.3","v2.21.2","v2.21.1","v2.21.0","v2.20.0","v2.19.1","v2.19.0","v2.18.0","v2.17.1","v2.17.0","v2.16.0","v2.15.2","v2.15.1","v2.15.0","v2.14.4","v2.14.3","v2.14.2","v2.14.1","v2.14.0","v2.13.2","v2.13.1","v2.13.0","v2.12.0","v2.11.3","v2.11.2","v2.11.1","v2.11.0","v2.10.4","v2.10.3","v2.10.2","v2.10.1","v2.10.0","v2.9.3","v2.9.2","v2.9.1","v2.9.0","v2.8.0","v2.7.1","v2.7.0","v2.6.1","v2.6.0","v2.5.0","v2.4.3","v2.4.2","v2.4.1","v2.4.0","v2.3.1","v2.3.0","v2.2.0","v2.1.1","v2.1.0","v2.0.4","v2.0.3","v2.0.2","v2.0.1","v2.0.0","v2.0.0-rc2","v2.0.0.rc1","v2.0.0.beta.5","v2.0.0-beta.4","v2.0.0-beta.3","v2.0.0-beta.1","v2.0.0a5","v2.0.0a4","v2.0.0a3","v2.0.0a2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-122330.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}