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    CVE-2021-36086

    The CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list).

    Published:Apr 19, 2021
    Last Modified:Mar 24, 2026
    EPS:Jul 1, 2021
    EPSS Score:0.00026
    CVSS Score:3.3

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Netapp
    Product
    Active Iq Unified Manager
    Vendor
    Netapp
    Product
    Bootstrap Os
    Vendor
    Netapp
    Product
    H610c
    Vendor
    Netapp
    Product
    H610c Firmware
    Vendor
    Netapp
    Product
    H610s
    Vendor
    Netapp
    Product
    H610s Firmware
    Vendor
    Netapp
    Product
    H615c
    Vendor
    Netapp
    Product
    H615c Firmware
    Vendor
    Netapp
    Product
    Hci Compute Node
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Selinux Project
    Product
    Selinux

    Exploits

    https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32177https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32177

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32177
    https://github.com/SELinuxProject/selinux/commit/c49a8ea09501ad66e799ea41b8154b6770fec2c8
    https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-536.yaml
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/
    https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32177
    https://github.com/SELinuxProject/selinux/commit/c49a8ea09501ad66e799ea41b8154b6770fec2c8
    https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-536.yaml
    https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/
    https://security.netapp.com/advisory/ntap-20250207-0004/

    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