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    CVE-2009-2847

    The do_sigaltstack function in kernel/signal.c in Linux kernel 2.4 through 2.4.37 and 2.6 before 2.6.31-rc5, when running on 64-bit systems, does not clear certain padding bytes from a structure, which allows local users to obtain sensitive information from the kernel stack via the sigaltstack function.

    Published:Jul 31, 2009
    Last Modified:Apr 23, 2026
    EPS:Aug 18, 2009
    EPSS Score:0.00182
    CVSS Score:4.9

    Affected Products

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

    Exploits

    https://www.exploit-db.com/exploits/9352

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    CVE-2026-68090 (CVSS 5.5) — In the Linux kernel, the following vulnerability has been resolved: debugobjects: Plug race against a concurr…
    CVE-2026-64082 (CVSS 7.8) — In the Linux kernel, the following vulnerability has been resolved: riscv: Fix register corruption from unini…
    CVE-2026-46243 (CVSS 7.1) — In the Linux kernel, the following vulnerability has been resolved: smb: client: reject userspace cifs.spnego…
    CVE-2026-46300 (CVSS 7.8) — In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker …
    CVE-2026-43266 (CVSS 5.5) — In the Linux kernel, the following vulnerability has been resolved: EFI/CPER: don't go past the ARM processor…
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    References

    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=0083fc2c50e6c5127c2802ad323adf8143ab7856
    http://rhn.redhat.com/errata/RHSA-2009-1243.html
    http://secunia.com/advisories/36136
    http://secunia.com/advisories/36501
    http://secunia.com/advisories/36562
    http://secunia.com/advisories/36759
    http://secunia.com/advisories/37105
    http://secunia.com/advisories/37471
    http://www.exploit-db.com/exploits/9352
    http://www.openwall.com/lists/oss-security/2009/08/04/1
    http://www.openwall.com/lists/oss-security/2009/08/05/1
    http://www.openwall.com/lists/oss-security/2009/08/26/2
    http://www.redhat.com/support/errata/RHSA-2009-1438.html
    http://www.securityfocus.com/archive/1/507985/100/0/threaded
    http://www.ubuntu.com/usn/USN-852-1
    http://www.vmware.com/security/advisories/VMSA-2009-0016.html
    http://www.vupen.com/english/advisories/2009/3316
    https://bugzilla.redhat.com/show_bug.cgi?id=515392
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10637
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8405
    https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01256.html
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=0083fc2c50e6c5127c2802ad323adf8143ab7856
    http://rhn.redhat.com/errata/RHSA-2009-1243.html
    http://secunia.com/advisories/36136
    http://secunia.com/advisories/36501
    http://secunia.com/advisories/36562
    http://secunia.com/advisories/36759
    http://secunia.com/advisories/37105
    http://secunia.com/advisories/37471
    http://www.exploit-db.com/exploits/9352
    http://www.openwall.com/lists/oss-security/2009/08/04/1
    http://www.openwall.com/lists/oss-security/2009/08/05/1
    http://www.openwall.com/lists/oss-security/2009/08/26/2
    http://www.redhat.com/support/errata/RHSA-2009-1438.html
    http://www.securityfocus.com/archive/1/507985/100/0/threaded
    http://www.ubuntu.com/usn/USN-852-1
    http://www.vmware.com/security/advisories/VMSA-2009-0016.html
    http://www.vupen.com/english/advisories/2009/3316
    https://bugzilla.redhat.com/show_bug.cgi?id=515392
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10637
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8405
    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