{"id":"CVE-2026-122330","aliases":[],"cve":{"records":[{"id":"CVE-2026-122330","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-04T23:26:08.935Z","published":"2026-11-05T15:11:48.557Z","modified":"2026-11-05T20:42:34.933Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-05T15:11:48.557Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-05T20:42:34.933Z"}],"references":[{"url":"https://github.com/Blosc/c-blosc2/issues/834","tags":["issue-tracking"],"source":"VulnCheck"},{"url":"https://github.com/Blosc/c-blosc2/commit/4fff1787408d94b895c6f9cb50f7925ad5919052","tags":["patch"],"source":"VulnCheck"},{"url":"https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/schunk.c#L1662-L1700","tags":["technical-description"],"source":"VulnCheck"},{"url":"https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/frame.c#L1214-L1227","tags":["technical-description"],"source":"VulnCheck"},{"url":"https://hackmd.io/@haindpwn/c-blosc2-schunk-slice-divide-by-zero","tags":["third-party-advisory"],"source":"VulnCheck"},{"url":"https://github.com/Blosc/c-blosc2","tags":["product"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/blosc-c-blosc2-before-3.5.0-divide-by-zero-via-blosc2-schunk-get-slice-buffer","tags":["third-party-advisory"],"source":"VulnCheck"},{"url":"https://hackmd.io/@haindpwn/cve-2026-122330-c-blosc2-schunk-slice-divide-by-zero","tags":["exploit"],"source":"CISA-ADP"}],"weaknesses":[{"id":"CWE-369","description":"Divide By Zero","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:blosc:c-blosc2:*:*:*:*:*:*:*:*","versionEndExcluding":"3.5.0"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-05T20:42:11.695290Z","decisions":[{"name":"Exploitation","value":"poc"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Blosc c-blosc2 before 3.5.0 Divide-by-Zero via blosc2_schunk_get_slice_buffer()","titleSource":"VulnCheck","descriptionSource":"VulnCheck","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.","score":6.8,"severity":"medium","published":"2026-11-05T15:11:48.557Z","modified":"2026-11-05T20:42:34.933Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Blosc","name":"c-blosc2","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"3.5.0","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:github/Blosc/c-blosc2","cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-122330"}],"remediation":[],"references":["https://github.com/Blosc/c-blosc2/issues/834","https://github.com/Blosc/c-blosc2/commit/4fff1787408d94b895c6f9cb50f7925ad5919052","https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/schunk.c#L1662-L1700","https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/frame.c#L1214-L1227","https://hackmd.io/@haindpwn/c-blosc2-schunk-slice-divide-by-zero","https://github.com/Blosc/c-blosc2","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"],"sources":[{"name":"CVE","id":"CVE-2026-122330","modified":"2026-11-05T20:42:34.933Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-122330"}],"assessments":[{"source":"VulnCheck","vector":"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","score":6.8},{"source":"VulnCheck","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":5.5}],"sourceAffected":[],"observedAt":"2026-11-05T20:59:40.625Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T02:25:31.038Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-05T21:05:37.543Z","attemptedAt":"2026-11-05T21:05:37.543Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-05T21:05:37.816Z","attemptedAt":"2026-11-05T21:05:37.816Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-05T21:05:38.541Z","attemptedAt":"2026-11-05T21:05:38.541Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-05T21:05:37.748Z","attemptedAt":"2026-11-05T21:05:37.748Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-122330","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-122330","modified":"2026-11-05T16:17:46.197","score":6.8,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-11-05T21:05:37.543Z"},{"source":"NVD","id":"CVE-2026-122330","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-122330","modified":"2026-11-05T16:17:46.197","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","checkedAt":"2026-11-05T21:05:37.543Z"},{"source":"GitHub Advisory Database","id":"GHSA-99fx-294r-j6xw","url":"https://github.com/advisories/GHSA-99fx-294r-j6xw","modified":"2026-11-05T18:33:24Z","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","checkedAt":"2026-11-05T21:05:37.816Z"},{"source":"ENISA EUVD","id":"EUVD-2026-117538","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-117538","modified":"Nov 5, 2026, 3:11:48 PM","score":6.8,"vector":"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","checkedAt":"2026-11-05T21:05:38.541Z"}],"aiSummary":{"text":"Blosc c-blosc2 before 3.5.0 has a divide-by-zero vulnerability in blosc2_schunk_get_slice_buffer() that allows attackers to crash applications with crafted frames. Attackers need to provide a malicious Blosc2 frame. The impact is a process termination via SIGFPE.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-05T16:16:07.751Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-122330"}]}}