CVE-2009-1895

High

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).

Package Linux Kernel
Published 2009-07-16
Last modified 2026-04-23
CVSS version 2.0
Patch available
Awaiting data

CVSS 2.0 score

7.2

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
User Interaction
Scope
Confidentiality
Low
Integrity
Availability
Vector string
AV:L/AC:L/Au:N/C:C/I:C/A:C

Weakness type

CWE-16

CVE-2009-1895 is classified as CWE-16

See CWE-16 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2009-1895 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

4 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2009-1895?

    CVE-2009-1895 is a High severity Linux kernel vulnerability with a CVSS score of 7.2 out of 10 . CVE-2009-1895 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2009-1895?

    CVE-2009-1895 has a CVSS score of 7.2 out of 10, rated High severity (CVSS 2.0). The vector string is AV:L/AC:L/Au:N/C:C/I:C/A:C .

  • Is there a patch available for CVE-2009-1895?

    No patch is currently available for CVE-2009-1895. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2009-1895 actively exploited?

    No — CVE-2009-1895 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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