kernel: personality: fix PER_CLEAR_ON_SETID
Published Jul 16, 2009
7.2
HIGHCVSS 2.0
EPSS 0.44%
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).
Affected products
No data.
Configuration 1
- ≤ 2.6.31
- 2.6.31
- 2.6.31
Configuration 2
- 4.0
- 5.0
Configuration 3
- 6.06
- 8.04
- 8.10
- 9.04
No data.
MRG for RHEL-5
kernel-rt-0:2.6.24.7-137.el5rt
Fixed · RHSA-2009:1540
Red Hat Enterprise Linux 3
kernel-0:2.4.21-63.EL
Fixed · RHSA-2009:1550
Red Hat Enterprise Linux 4
kernel-0:2.6.9-89.0.11.EL
Fixed · RHSA-2009:1438
Red Hat Enterprise Linux 5
kernel-0:2.6.18-128.4.1.el5
Fixed · RHSA-2009:1193
Red Hat Enterprise Linux 5.2 Z Stream
kernel-0:2.6.18-92.1.35.el5
Fixed · RHSA-2010:0079
Red Hat Enterprise Linux 5.3.Z - Server Only
kernel-0:2.6.18-128.4.1.el5
Fixed · RHSA-2009:1193
| Product | Package | State | Advisory |
|---|---|---|---|
| MRG for RHEL-5 | kernel-rt-0:2.6.24.7-137.el5rt | Fixed | RHSA-2009:1540 |
| Red Hat Enterprise Linux 3 | kernel-0:2.4.21-63.EL | Fixed | RHSA-2009:1550 |
| Red Hat Enterprise Linux 4 | kernel-0:2.6.9-89.0.11.EL | Fixed | RHSA-2009:1438 |
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-128.4.1.el5 | Fixed | RHSA-2009:1193 |
| Red Hat Enterprise Linux 5.2 Z Stream | kernel-0:2.6.18-92.1.35.el5 | Fixed | RHSA-2010:0079 |
| Red Hat Enterprise Linux 5.3.Z - Server Only | kernel-0:2.6.18-128.4.1.el5 | Fixed | RHSA-2009:1193 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.44% (0.00439) | 35.83th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.44% (0.00439) | 34.77th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00060) | 15.98th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00062) | 28.39th | v3 (v2023.03.01) |
| Jun 12, 2024 | 0.06% (0.00062) | 26.40th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00062) | 24.37th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
References (39)
- http://blog.cr0.org/2009/06/bypassing-linux-null-pointer.html x_refsource_MISCPatchThird Party Advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f9fabcb58a6d26d6efde842d1703ac7cfa9427b6 x_refsource_CONFIRM
- http://patchwork.kernel.org/patch/32598/ x_refsource_CONFIRMPatchVendor Advisory
- http://secunia.com/advisories/35801 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/36045 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/36051 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/36054 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/36116 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/36131 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/36759 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/37471 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://wiki.rpath.com/Advisories:rPSA-2009-0111 x_refsource_CONFIRMThird Party Advisory
- http://www.debian.org/security/2009/dsa-1844 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.debian.org/security/2009/dsa-1845 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc3 x_refsource_CONFIRMVendor Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:051 vendor-advisoryx_refsource_MANDRIVAThird Party Advisory
- http://www.osvdb.org/55807 vdb-entryx_refsource_OSVDBBroken Link
- http://www.redhat.com/support/errata/RHSA-2009-1193.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.redhat.com/support/errata/RHSA-2009-1438.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.securityfocus.com/archive/1/505254/100/0/threaded mailing-listx_refsource_BUGTRAQThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/archive/1/507985/100/0/threaded mailing-listx_refsource_BUGTRAQThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/archive/1/512019/100/0/threaded mailing-listx_refsource_BUGTRAQThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/35647 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/usn-807-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html x_refsource_CONFIRMThird Party Advisory
- http://www.vupen.com/english/advisories/2009/1866 vdb-entryx_refsource_VUPENPatchThird Party Advisory
- http://www.vupen.com/english/advisories/2009/3316 vdb-entryx_refsource_VUPENThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2009-1895 Vendor Advisory
- https://bugs.launchpad.net/bugs/cve/2009-1895 x_refsource_CONFIRMThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=511171 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2009-1895
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11768 vdb-entrysignaturex_refsource_OVALThird Party Advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7826 vdb-entrysignaturex_refsource_OVALThird Party Advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9453 vdb-entrysignaturex_refsource_OVALThird Party Advisory
- https://rhn.redhat.com/errata/RHSA-2009-1540.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://rhn.redhat.com/errata/RHSA-2009-1550.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2009-1895
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00166.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00223.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
Change history (0)
No recorded changes yet.