kernel: mm: memcg: unregistring of events attached to the same eventfd can lead to oops
Published May 17, 2012
5.5
MEDIUMCVSS 3.1
EPSS 0.52%
Description
The mem_cgroup_usage_unregister_event function in mm/memcontrol.c in the Linux kernel before 3.2.10 does not properly handle multiple events that are attached to the same eventfd, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by registering memory threshold events.
Affected products
No data.
Configuration 1
- < 3.2.10
Configuration 2
- 16
Configuration 3
- 11
- 11
- 11
- 11
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5 as they did not include support for control groups. This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6 as they did not include support for memory control groups threshold notifications. This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise MRG as they did not include support for memory control groups.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:N/I:N/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 | 0.52% (0.00520) | 42.07th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.52% (0.00520) | 39.83th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.07% (0.00072) | 19.24th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00043) | 11.63th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.04% (0.00043) | 9.83th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00043) | 7.83th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.28% (0.01282) | 68.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
References (13)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=371528caec553785c37f73fa3926ea0de84f986f x_refsource_CONFIRM
- http://lists.fedoraproject.org/pipermail/package-announce/2012-March/075781.html vendor-advisoryx_refsource_FEDORAMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://secunia.com/advisories/48898 third-party-advisoryx_refsource_SECUNIABroken Link
- http://secunia.com/advisories/48964 third-party-advisoryx_refsource_SECUNIABroken Link
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.10 x_refsource_CONFIRMMailing ListPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2012/03/07/3 mailing-listx_refsource_MLISTExploitMailing ListPatchThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2012-1146 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=800813 x_refsource_CONFIRMExploitIssue TrackingPatchThird Party Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/73711 vdb-entryx_refsource_XFThird Party AdvisoryVDB Entry
- https://github.com/torvalds/linux/commit/371528caec553785c37f73fa3926ea0de84f986f x_refsource_CONFIRMExploitPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2012-1146
- https://www.cve.org/CVERecord?id=CVE-2012-1146
Change history (0)
No recorded changes yet.