kernel: x86_64 32 bit process register leak
Published Oct 20, 2009
2.1
LOWCVSS 2.0
EPSS 0.41%
Description
arch/x86/ia32/ia32entry.S in the Linux kernel before 2.6.31.4 on the x86_64 platform does not clear certain kernel registers before a return to user mode, which allows local users to read register values from an earlier process by switching an ia32 process to 64-bit mode.
Affected products
No data.
Configuration 1
- < 2.6.31.4
Configuration 2
- 10
- 11.0
- 10
- 9
- 10
- 10
Configuration 3
- 6.06
- 8.04
- 8.10
- 9.04
- 9.10
Configuration 4
- 5
- 5.0
- 5.4
- 5.0
- 5.0
Configuration 5
- 10
No data.
MRG for RHEL-5
kernel-rt-0:2.6.24.7-137.el5rt
Fixed · RHSA-2009:1540
Red Hat Enterprise Linux 4
kernel-0:2.6.9-89.0.18.EL
Fixed · RHSA-2009:1671
Red Hat Enterprise Linux 5
kernel-0:2.6.18-164.11.1.el5
Fixed · RHSA-2010:0046
| 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 4 | kernel-0:2.6.9-89.0.18.EL | Fixed | RHSA-2009:1671 |
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-164.11.1.el5 | Fixed | RHSA-2010:0046 |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue is not planned to be fixed in Red Hat Enterprise Linux 3, due to this product being in Production 3 of its maintenance life-cycle, where only qualified security errata of important and critical impact are addressed. For further information about Errata Support Policy, visit: https://access.redhat.com/support/policy/updates/errata/
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:P/I:N/A:N
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 2, 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 2, 2026 | 0.41% (0.00414) | 33.44th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.41% (0.00414) | 32.83th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.05% (0.00052) | 13.33th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00044) | 11.89th | v3 (v2023.03.01) |
| Jul 2, 2024 | 0.04% (0.00044) | 10.25th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 8.24th | 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 (27)
- http://git.kernel.org/?p=linux/kernel/git/x86/linux-2.6-tip.git%3Ba=commit%3Bh=24e35800cdc4350fc34e2bed37b608a9e13ab3b6 x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00005.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00007.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lkml.org/lkml/2009/10/1/164 mailing-listx_refsource_MLISTPatchThird Party Advisory
- http://marc.info/?l=oss-security&m=125442304214452&w=2 mailing-listx_refsource_MLISTThird Party Advisory
- http://marc.info/?l=oss-security&m=125444390112831&w=2 mailing-listx_refsource_MLISTThird Party Advisory
- http://marc.info/?l=oss-security&m=125511635004768&w=2 mailing-listx_refsource_MLISTThird Party Advisory
- http://secunia.com/advisories/36927 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/37075 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/37351 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://support.avaya.com/css/P8/documents/100073666 x_refsource_CONFIRMThird Party Advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.4 x_refsource_CONFIRMBroken Link
- http://www.openwall.com/lists/oss-security/2009/10/02/1 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.redhat.com/support/errata/RHSA-2009-1671.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.securityfocus.com/bid/36576 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/usn-864-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2009-2910 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=526788 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2009-2910
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10823 vdb-entrysignaturex_refsource_OVALThird Party Advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7359 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-2010-0046.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://rhn.redhat.com/errata/RHSA-2010-0095.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2009-2910
- https://www.redhat.com/archives/fedora-package-announce/2009-October/msg00483.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
Change history (0)
No recorded changes yet.