{"schemaVersion":3,"id":"CVE-2026-45752","aliases":["UBUNTU-CVE-2026-45752","DEBIAN-CVE-2026-45752"],"status":"published","duplicateOf":null,"title":null,"description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and prior to version 8.0.5, when certain detection transforms are chained, the decompress transform pipeline could read from an inspection buffer after it had been reallocated and freed. The issue is reached during network traffic processing, but requires a malicious rule as Suricata will crash whatever the traffic. Version 8.0.5 contains a fix. As a workaround, avoid rules that chain `gunzip` or `zlib_deflate` with `max-size` bigger than 4096 after another transform.","dates":{"published":"2026-09-10T20:37:49.927Z","modified":"2026-09-11T17:46:04.554Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.9,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":5.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","type":"weakness","status":"Stable","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/416.html"}],"affected":[{"vendor":"debian","product":"suricata","name":"suricata","label":"suricata","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/suricata","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1:8.0.5-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 1:8.0.5-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"suricata","name":"suricata","label":"suricata","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/suricata","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"oisf","product":"suricata","name":"suricata","label":"suricata","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 8.0.0, < 8.0.5","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 8.0.0, < 8.0.5","eol":null,"hubHref":"/vendor/oisf/suricata"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-qmc9-vqq2-8mv3","label":"github.com/OISF/suricata/security/advisories/GHSA-qmc9-vqq2-8mv3","hostname":"github.com","tags":["X Refsource CONFIRM","REPORT","Mitigation","Vendor Advisory"]},{"url":"https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315","label":"forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315","hostname":"forum.suricata.io","tags":["X Refsource MISC","REPORT","Release Notes","Vendor Advisory"]},{"url":"https://redmine.openinfosecfoundation.org/issues/8536","label":"redmine.openinfosecfoundation.org/issues/8536","hostname":"redmine.openinfosecfoundation.org","tags":["X Refsource MISC","REPORT","Permissions Required"]},{"url":"https://ubuntu.com/security/CVE-2026-45752","label":"ubuntu.com/security/CVE-2026-45752","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-45752","label":"www.cve.org/CVERecord?id=CVE-2026-45752","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://redmine.openinfosecfoundation.org/issues/8541","label":"redmine.openinfosecfoundation.org/issues/8541","hostname":"redmine.openinfosecfoundation.org","tags":["REPORT"]},{"url":"https://github.com/OISF/suricata/commit/11d1fe1ca866d82e8bb3dd4493016188d890aebd","label":"github.com/OISF/suricata/commit/11d1fe1ca866d82e8bb3dd4493016188d890aebd","hostname":"github.com","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-45752","label":"security-tracker.debian.org/tracker/CVE-2026-45752","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:10885-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:10885-1"]},"timeline":[{"kind":"published","date":"2026-09-10T20:37:49.927Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-11T17:46:04.554Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":24,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T13:39:43.217Z","stale":false,"partial":false}}