The personality subsystem in the Linux kernel before 2.6.31-rc3 has a PER_CLEAR_ON_SETID setting that does not clear the…

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).

Scores

EPSS (exploitation in 30 days)

0.44% · top 62% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.2.

Weakness

• n/a
• CWE-16 (opens in a new tab)All about CWE-16 and its CVEs

Affected products

• n/a

  • affected n/a

References (35)

• 20100625 VMSA-2010-0010 ESX 3.5 third party update for Service Console kernel (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• http://wiki.rpath.com/Advisories:rPSA-2009-0111 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 36131 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 55807 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
• ADV-2009-1866 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• RHSA-2009:1540 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 37471 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 36759 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• FEDORA-2009-8144 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• DSA-1844 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• USN-807-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• http://www.vmware.com/security/advisories/VMSA-2009-0016.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• RHSA-2009:1193 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f9fabcb58a6d26d6efde842d1703ac7cfa9427b6 (opens in a new tab)x_refsource_CONFIRMx_transferred
• oval:org.mitre.oval:def:7826 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• 35647 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• FEDORA-2009-8264 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• 20090724 rPSA-2009-0111-1 kernel (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• http://blog.cr0.org/2009/06/bypassing-linux-null-pointer.html (opens in a new tab)x_refsource_MISCx_transferred
• MDVSA-2011:051 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• 20091120 VMSA-2009-0016 VMware vCenter and ESX update release and vMA patch release address multiple security issue in third party components (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 36051 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• oval:org.mitre.oval:def:11768 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• 36045 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 36116 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• RHSA-2009:1550 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• http://patchwork.kernel.org/patch/32598/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc3 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 35801 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 36054 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• https://bugs.launchpad.net/bugs/cve/2009-1895 (opens in a new tab)x_refsource_CONFIRMx_transferred
• DSA-1845 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• oval:org.mitre.oval:def:9453 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• RHSA-2009:1438 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• ADV-2009-3316 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2009-1895](https://trackcve.app/badge/CVE-2009-1895.svg)](https://trackcve.app/cve/CVE-2009-1895)

Record last updated 7 Aug 2024, 05:27 UTC.