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    CVE-2009-1238

    Race condition in the HFS vfs sysctl interface in XNU 1228.8.20 and earlier on Apple Mac OS X 10.5.6 and earlier allows local users to cause a denial of service (kernel memory corruption) by simultaneously executing the same HFS_SET_PKG_EXTENSIONS code path in multiple threads, which is problematic because of lack of mutex locking for an unspecified global variable.

    Published:Apr 2, 2009
    Last Modified:Apr 23, 2026
    EPS:Apr 2, 2009
    EPSS Score:0.00216
    CVSS Score:7.2

    Affected Products

    Vendor
    Apple
    Product
    Mac Os X
    Vendor
    Apple
    Product
    Mac Os X Server

    Exploits

    http://www.digit-labs.org/files/exploits/xnu-vfssysctl-dos.chttp://www.securityfocus.com/bid/34202http://www.digit-labs.org/files/exploits/xnu-vfssysctl-dos.chttp://www.securityfocus.com/bid/34202https://www.exploit-db.com/exploits/8265

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    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