{"id":"CVE-2026-88341","title":"A reachable assertion vulnerability exists in YARA 4.5.8 when loading crafted .yrc compiled rule files","summary":"A reachable assertion vulnerability exists in YARA 4.5.8 when loading crafted .yrc compiled rule files. An attacker can provide a malicious file with an invalid arena configuration (num_buffers=0) that triggers an assertion failure in yr…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-617"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10","enterprise_linux 8","enterprise_linux 9"],"published":"2026-09-22","updated":"2026-09-24","sourceUpdated":"2026-09-24T21:08:22.573","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88341","references":[{"url":"https://github.com/NOUIY/yara/commit/0cdff36723cd260243bb2b330bda555693354760","label":"cve@mitre.org"},{"url":"https://github.com/VirusTotal/yara/issues/2238","label":"cve@mitre.org"},{"url":"https://github.com/VirusTotal/yara/issues/2238","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88341.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-88341"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2538991"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88341"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88341"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"epss":0.00151,"epssPercentile":0.04166,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-23T14:59:42.656278Z"},"scores":{"nvd":5.5,"vendor":5},"ingestedAt":"2026-09-22T20:10:15.097Z","slug":"CVE-2026-88341","body":"## Overview\n\nA reachable assertion vulnerability exists in YARA 4.5.8 when loading crafted .yrc compiled rule files. An attacker can provide a malicious file with an invalid arena configuration (num_buffers=0) that triggers an assertion failure in yr_arena_get_ptr(), causing the application to terminate.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88341.json)","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":209707,"id":"CVE-2026-88341","ts":1790177218877,"field":"exploit_available","old":"false","new":"true"},{"seq":209706,"id":"CVE-2026-88341","ts":1790177218877,"field":"cvss","old":null,"new":"5.5"},{"seq":209705,"id":"CVE-2026-88341","ts":1790177218877,"field":"severity","old":"none","new":"medium"}]}