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    CVE-2026-88340

    An invalid pointer release vulnerability exists in YARA 4.5.8 during deserialization of compiled .yrc rule files. The vulnerability is caused by insufficient validation of external-variable pointers, which may lead to invalid free in yr_rules_destroy() or wild pointer access in yr_object_create(). An attacker can provide a specially crafted .yrc file that causes memory corruption and application crash.

    Published:Sep 22, 2026
    Last Modified:Sep 25, 2026
    EPS:Sep 22, 2026
    EPSS Score:0.00167
    CVSS Score:7.6

    Affected Products

    Vendor
    Virustotal
    Product
    Yara

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-88341 (CVSS 5.5) — A reachable assertion vulnerability exists in YARA 4.5.8 when loading crafted .yrc compiled rule files. An att…
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    CVE-2021-45429 (CVSS 5.5) — A Buffer Overflow vulnerablity exists in VirusTotal YARA git commit: 605b2edf07ed8eb9a2c61ba22eb2e7c362f47ba7 …
    CVE-2021-3402 (CVSS 9.1) — An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earl…
    CVE-2019-19648 (CVSS 7.8) — In the macho_parse_file functionality in macho/macho.c of YARA 3.11.0, command_size may be inconsistent with t…
    CVE-2019-5020 (CVSS 5.5) — An exploitable denial of service vulnerability exists in the object lookup functionality of Yara 3.8.1. A spec…
    CVE-2018-19974 (CVSS 5.5) — In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memor…
    CVE-2018-19976 (CVSS 5.5) — In YARA 3.8.1, bytecode in a specially crafted compiled rule is exposed to information about its environment, …
    CVE-2018-19975 (CVSS 5.5) — In YARA 3.8.1, bytecode in a specially crafted compiled rule can read data from any arbitrary address in memor…
    CVE-2018-12035 (CVSS 7.8) — In YARA 3.7.1 and prior, parsing a specially crafted compiled rule file can cause an out of bounds write vulne…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High