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    CVE-2009-2695

    The Linux kernel before 2.6.31-rc7 does not properly prevent mmap operations that target page zero and other low memory addresses, which allows local users to gain privileges by exploiting NULL pointer dereference vulnerabilities, related to (1) the default configuration of the allow_unconfined_mmap_low boolean in SELinux on Red Hat Enterprise Linux (RHEL) 5, (2) an error that causes allow_unconfined_mmap_low to be ignored in the unconfined_t domain, (3) lack of a requirement for the CAP_SYS_RAWIO capability for these mmap operations, and (4) interaction between the mmap_min_addr protection mechanism and certain application programs.

    Published:Jul 31, 2009
    Last Modified:Apr 23, 2026
    EPS:Aug 28, 2009
    EPSS Score:0.00078
    CVSS Score:7.2

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Mrg
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    http://danwalsh.livejournal.com/30084.htmlhttp://danwalsh.livejournal.com/30084.html

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    References

    http://danwalsh.livejournal.com/30084.html
    http://eparis.livejournal.com/606.html
    http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=47d439e9fb8a81a90022cfa785bf1c36c4e2aff6
    http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=7c73875e7dda627040b12c19b01db634fa7f0fd1
    http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=84336d1a77ccd2c06a730ddd38e695c2324a7386
    http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=a2551df7ec568d87793d2eea4ca744e86318f205
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1d9959734a1949ea4f2427bd2d8b21ede6b2441c
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=788084aba2ab7348257597496befcbccabdc98a3
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8cf948e744e0218af604c32edecde10006dc8e9e
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9c0d90103c7e0eb6e638e5b649e9f6d8d9c1b4b3
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ab5a91a8364c3d6fc617abc47cc81d162c01d90a
    http://kbase.redhat.com/faq/docs/DOC-18042
    http://lists.vmware.com/pipermail/security-announce/2010/000082.html
    http://patchwork.kernel.org/patch/36539/
    http://patchwork.kernel.org/patch/36540/
    http://patchwork.kernel.org/patch/36649/
    http://patchwork.kernel.org/patch/36650/
    http://secunia.com/advisories/36501
    http://secunia.com/advisories/37105
    http://secunia.com/advisories/38794
    http://secunia.com/advisories/38834
    http://thread.gmane.org/gmane.linux.kernel.lsm/9075
    http://twitter.com/spendergrsec/statuses/3303390960
    http://www.debian.org/security/2010/dsa-2005
    http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc7
    http://www.openwall.com/lists/oss-security/2009/08/17/4
    http://www.redhat.com/support/errata/RHSA-2009-1672.html
    http://www.securityfocus.com/bid/36051
    http://www.ubuntu.com/usn/USN-852-1
    http://www.vupen.com/english/advisories/2010/0528
    https://bugzilla.redhat.com/show_bug.cgi?id=511143
    https://bugzilla.redhat.com/show_bug.cgi?id=517830
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7144
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9882
    https://rhn.redhat.com/errata/RHSA-2009-1540.html
    https://rhn.redhat.com/errata/RHSA-2009-1548.html
    https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01256.html
    http://danwalsh.livejournal.com/30084.html
    http://eparis.livejournal.com/606.html
    http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=47d439e9fb8a81a90022cfa785bf1c36c4e2aff6
    http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=7c73875e7dda627040b12c19b01db634fa7f0fd1
    http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=84336d1a77ccd2c06a730ddd38e695c2324a7386
    http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=a2551df7ec568d87793d2eea4ca744e86318f205
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1d9959734a1949ea4f2427bd2d8b21ede6b2441c
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=788084aba2ab7348257597496befcbccabdc98a3
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8cf948e744e0218af604c32edecde10006dc8e9e
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9c0d90103c7e0eb6e638e5b649e9f6d8d9c1b4b3
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ab5a91a8364c3d6fc617abc47cc81d162c01d90a
    http://kbase.redhat.com/faq/docs/DOC-18042
    http://lists.vmware.com/pipermail/security-announce/2010/000082.html
    http://patchwork.kernel.org/patch/36539/
    http://patchwork.kernel.org/patch/36540/
    http://patchwork.kernel.org/patch/36649/
    http://patchwork.kernel.org/patch/36650/
    http://secunia.com/advisories/36501
    http://secunia.com/advisories/37105
    http://secunia.com/advisories/38794
    http://secunia.com/advisories/38834
    http://thread.gmane.org/gmane.linux.kernel.lsm/9075
    http://twitter.com/spendergrsec/statuses/3303390960
    http://www.debian.org/security/2010/dsa-2005
    http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc7
    http://www.openwall.com/lists/oss-security/2009/08/17/4
    http://www.redhat.com/support/errata/RHSA-2009-1672.html
    http://www.securityfocus.com/bid/36051
    http://www.ubuntu.com/usn/USN-852-1
    http://www.vupen.com/english/advisories/2010/0528
    https://bugzilla.redhat.com/show_bug.cgi?id=511143
    https://bugzilla.redhat.com/show_bug.cgi?id=517830
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7144
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9882
    https://rhn.redhat.com/errata/RHSA-2009-1540.html
    https://rhn.redhat.com/errata/RHSA-2009-1548.html
    https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01256.html

    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