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    CVE-2009-3238

    The get_random_int function in drivers/char/random.c in the Linux kernel before 2.6.30 produces insufficiently random numbers, which allows attackers to predict the return value, and possibly defeat protection mechanisms based on randomization, via vectors that leverage the function's tendency to "return the same value over and over again for long stretches of time."

    Published:May 5, 2009
    Last Modified:Apr 23, 2026
    EPS:Sep 18, 2009
    EPSS Score:0.00241
    CVSS Score:5.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Opensuse
    Product
    Opensuse
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Mrg
    Vendor
    Suse
    Product
    Linux Enterprise Desktop
    Vendor
    Suse
    Product
    Linux Enterprise Server

    Exploits

    http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30

    Related CVEs

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    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8a0a9bd4db63bc45e3017bedeafbd88d0eb84d02
    http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00005.html
    http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html
    http://patchwork.kernel.org/patch/21766/
    http://secunia.com/advisories/37105
    http://secunia.com/advisories/37351
    http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30
    http://www.redhat.com/support/errata/RHSA-2009-1438.html
    http://www.ubuntu.com/usn/USN-852-1
    https://bugzilla.redhat.com/show_bug.cgi?id=499785
    https://bugzilla.redhat.com/show_bug.cgi?id=519692
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11168
    https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03836en_us
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8a0a9bd4db63bc45e3017bedeafbd88d0eb84d02
    http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00005.html
    http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html
    http://patchwork.kernel.org/patch/21766/
    http://secunia.com/advisories/37105
    http://secunia.com/advisories/37351
    http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30
    http://www.redhat.com/support/errata/RHSA-2009-1438.html
    http://www.ubuntu.com/usn/USN-852-1
    https://bugzilla.redhat.com/show_bug.cgi?id=499785
    https://bugzilla.redhat.com/show_bug.cgi?id=519692
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11168
    https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03836en_us

    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