{"id":"UBUNTU-CVE-2026-122330","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":"2026-11-07T01:46:28.962479801Z","published":"2026-11-06T00:00:00Z","upstream":["CVE-2026-122330"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-122330"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-122330"},{"type":"REPORT","url":"https://github.com/Blosc/c-blosc2"},{"type":"REPORT","url":"https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/frame.c#L1214-L1227"},{"type":"REPORT","url":"https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/schunk.c#L1662-L1700"},{"type":"REPORT","url":"https://github.com/Blosc/c-blosc2/commit/4fff1787408d94b895c6f9cb50f7925ad5919052"},{"type":"REPORT","url":"https://github.com/Blosc/c-blosc2/issues/834"},{"type":"REPORT","url":"https://hackmd.io/@haindpwn/c-blosc2-schunk-slice-divide-by-zero"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/blosc-c-blosc2-before-3.5.0-divide-by-zero-via-blosc2-schunk-get-slice-buffer"},{"type":"REPORT","url":"https://hackmd.io/@haindpwn/cve-2026-122330-c-blosc2-schunk-slice-divide-by-zero"}],"affected":[{"package":{"name":"c-blosc2","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/c-blosc2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.0+ds-1","2.12.0+ds-2","2.13.1+ds-1","2.13.1+ds-1ubuntu1","2.13.1+ds-1.1ubuntu1","2.13.1+ds-1.1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libblosc2-2t64","binary_version":"2.13.1+ds-1.1ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-122330.json"}},{"package":{"name":"c-blosc2","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/c-blosc2?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.23.0+ds-1","2.23.1+ds-1","2.23.1+ds-2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.23.1+ds-2","binary_name":"libblosc2-7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-122330.json"}},{"package":{"name":"c-blosc2","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/c-blosc2?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.17.1+ds-2","2.22.0+ds-1","2.23.0+ds-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.23.0+ds-1","binary_name":"libblosc2-7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-122330.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"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"},{"type":"Ubuntu","score":"medium"}]}