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    CVE-2009-1243

    net/ipv4/udp.c in the Linux kernel before 2.6.29.1 performs an unlocking step in certain incorrect circumstances, which allows local users to cause a denial of service (panic) by reading zero bytes from the /proc/net/udp file and unspecified other files, related to the "udp seq_file infrastructure."

    Published:Apr 6, 2009
    Last Modified:Apr 23, 2026
    EPS:Apr 6, 2009
    EPSS Score:0.00073
    CVSS Score:5.5

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-667 Improper Locking

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    References

    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=30842f2989aacfaba3ccb39829b3417be9313dbe
    http://openwall.com/lists/oss-security/2009/04/01/4
    http://secunia.com/advisories/34478
    http://vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-proc-net-udp-8586
    http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.29.1
    http://www.securityfocus.com/bid/34329
    http://www.vupen.com/english/advisories/2009/0924
    https://exchange.xforce.ibmcloud.com/vulnerabilities/49595
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=30842f2989aacfaba3ccb39829b3417be9313dbe
    http://openwall.com/lists/oss-security/2009/04/01/4
    http://secunia.com/advisories/34478
    http://vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-proc-net-udp-8586
    http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.29.1
    http://www.securityfocus.com/bid/34329
    http://www.vupen.com/english/advisories/2009/0924
    https://exchange.xforce.ibmcloud.com/vulnerabilities/49595

    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