kernel: taskstats: duplicate entries in listener mode can lead to DoS
Published Jun 24, 2011
4.9
MEDIUMCVSS 2.0
EPSS 0.39%
Description
The add_del_listener function in kernel/taskstats.c in the Linux kernel 2.6.39.1 and earlier does not prevent multiple registrations of exit handlers, which allows local users to cause a denial of service (memory and CPU consumption), and bypass the OOM Killer, via a crafted application.
Affected products
No data.
- ≤ 2.6.39.1
No data.
Red Hat Enterprise Linux 5
kernel-0:2.6.18-274.7.1.el5
Fixed · RHSA-2011:1386
Red Hat Enterprise Linux 6
kernel-0:2.6.32-131.17.1.el6
Fixed · RHSA-2011:1350
Red Hat Enterprise MRG 2
kernel-rt-0:2.6.33.9-rt31.75.el6rt
Fixed · RHSA-2011:1253
Red Hat Enterprise Linux 4
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-274.7.1.el5 | Fixed | RHSA-2011:1386 |
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-131.17.1.el6 | Fixed | RHSA-2011:1350 |
| Red Hat Enterprise MRG 2 | kernel-rt-0:2.6.33.9-rt31.75.el6rt | Fixed | RHSA-2011:1253 |
| Red Hat Enterprise Linux 4 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 as it did not provide support for the Taskstats interface. This was fixed in Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-1386.html, https://rhn.redhat.com/errata/RHSA-2011-1350.html and https://rhn.redhat.com/errata/RHSA-2011-1253.html.
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: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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.39% (0.00388) | 30.49th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.39% (0.00388) | 30.41th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.05% (0.00046) | 11.17th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.03% (0.01034) | 41.16th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.28% (0.01282) | 67.60th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
References (9)
- http://lists.openwall.net/linux-kernel/2011/06/16/605 mailing-listx_refsource_MLISTPatch
- http://openwall.com/lists/oss-security/2011/06/22/1 mailing-listx_refsource_MLISTMailing ListPatch
- http://openwall.com/lists/oss-security/2011/06/22/2 mailing-listx_refsource_MLISTMailing ListPatch
- http://www.securityfocus.com/bid/48383 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2011-2484 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=715436 x_refsource_MISCIssue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68150 vdb-entryx_refsource_XFVDB Entry
- https://nvd.nist.gov/vuln/detail/CVE-2011-2484
- https://www.cve.org/CVERecord?id=CVE-2011-2484
| Link | Providers | Tags |
|---|---|---|
| http://lists.openwall.net/linux-kernel/2011/06/16/605 | mailing-listx_refsource_MLISTPatch | |
| http://openwall.com/lists/oss-security/2011/06/22/1 | mailing-listx_refsource_MLISTMailing ListPatch | |
| http://openwall.com/lists/oss-security/2011/06/22/2 | mailing-listx_refsource_MLISTMailing ListPatch | |
| http://www.securityfocus.com/bid/48383 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2011-2484 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=715436 | x_refsource_MISCIssue Tracking | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/68150 | vdb-entryx_refsource_XFVDB Entry | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-2484 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-2484 |
Change history (0)
No recorded changes yet.