Unrated severityNVD Advisory· Published Jul 16, 2009· Updated Jun 16, 2026
CVE-2009-1895
CVE-2009-1895
Description
The personality subsystem in the Linux kernel before 2.6.31-rc3 has a PER_CLEAR_ON_SETID setting that does not clear the ADDR_COMPAT_LAYOUT and MMAP_PAGE_ZERO flags when executing a setuid or setgid program, which makes it easier for local users to leverage the details of memory usage to (1) conduct NULL pointer dereference attacks, (2) bypass the mmap_min_addr protection mechanism, or (3) defeat address space layout randomization (ASLR).
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
10cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:lts:*:*:*+ 3 more
- cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:8.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:9.04:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
35- blog.cr0.org/2009/06/bypassing-linux-null-pointer.htmlnvdPatchThird Party Advisory
- patchwork.kernel.org/patch/32598/nvdPatchVendor Advisory
- www.vupen.com/english/advisories/2009/1866nvdPatchThird Party Advisory
- secunia.com/advisories/35801nvdThird Party Advisory
- secunia.com/advisories/36045nvdThird Party Advisory
- secunia.com/advisories/36051nvdThird Party Advisory
- secunia.com/advisories/36054nvdThird Party Advisory
- secunia.com/advisories/36116nvdThird Party Advisory
- secunia.com/advisories/36131nvdThird Party Advisory
- secunia.com/advisories/36759nvdThird Party Advisory
- secunia.com/advisories/37471nvdThird Party Advisory
- wiki.rpath.com/Advisories:rPSA-2009-0111nvdThird Party Advisory
- www.debian.org/security/2009/dsa-1844nvdThird Party Advisory
- www.debian.org/security/2009/dsa-1845nvdThird Party Advisory
- www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc3nvdVendor Advisory
- www.mandriva.com/security/advisoriesnvdThird Party Advisory
- www.redhat.com/support/errata/RHSA-2009-1193.htmlnvdThird Party Advisory
- www.redhat.com/support/errata/RHSA-2009-1438.htmlnvdThird Party Advisory
- www.securityfocus.com/archive/1/505254/100/0/threadednvdThird Party AdvisoryVDB Entry
- www.securityfocus.com/archive/1/507985/100/0/threadednvdThird Party AdvisoryVDB Entry
- www.securityfocus.com/archive/1/512019/100/0/threadednvdThird Party AdvisoryVDB Entry
- www.securityfocus.com/bid/35647nvdThird Party AdvisoryVDB Entry
- www.ubuntu.com/usn/usn-807-1nvdThird Party Advisory
- www.vmware.com/security/advisories/VMSA-2009-0016.htmlnvdThird Party Advisory
- www.vupen.com/english/advisories/2009/3316nvdThird Party Advisory
- bugs.launchpad.net/bugs/cve/2009-1895nvdThird Party Advisory
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11768nvdThird Party Advisory
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7826nvdThird Party Advisory
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9453nvdThird Party Advisory
- rhn.redhat.com/errata/RHSA-2009-1540.htmlnvdThird Party Advisory
- rhn.redhat.com/errata/RHSA-2009-1550.htmlnvdThird Party Advisory
- www.redhat.com/archives/fedora-package-announce/2009-August/msg00166.htmlnvdThird Party Advisory
- www.redhat.com/archives/fedora-package-announce/2009-August/msg00223.htmlnvdThird Party Advisory
- www.osvdb.org/55807nvdBroken Link
- git.kernel.orgnvd
News mentions
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