kernel: ksm: race between ksmd and exiting task
Published Jun 13, 2012
4.0
MEDIUMCVSS 2.0
EPSS 0.54%
Description
Race condition in the scan_get_next_rmap_item function in mm/ksm.c in the Linux kernel before 2.6.39.3, when Kernel SamePage Merging (KSM) is enabled, allows local users to cause a denial of service (NULL pointer dereference) or possibly have unspecified other impact via a crafted application.
Affected products
No data.
- ≤ 2.6.39.2
- 2.6.39
- 2.6.39
- 2.6.39
- 2.6.39
- 2.6.39
- 2.6.39
- 2.6.39
- 2.6.39
- 2.6.39.1
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-131.12.1.el6
Fixed · RHSA-2011:1189
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
Red Hat Enterprise Linux 5
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-131.12.1.el6 | Fixed | RHSA-2011:1189 |
| 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 |
| Red Hat Enterprise Linux 5 | 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 4, 5, and Red Hat Enterprise MRG do not provide support for KSM (Kernel Samepage Merging). This has been addressed in Red Hat Enterprise Linux 6 via https://rhn.redhat.com/errata/RHSA-2011-1189.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:H/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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.54% (0.00541) | 43.40th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.54% (0.00541) | 40.97th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00063) | 17.03th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00045) | 17.92th | v3 (v2023.03.01) |
| May 1, 2024 | 0.04% (0.00045) | 14.50th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00045) | 12.46th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.76% (0.01761) | 76.53th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.76% (0.01761) | 76.01th | v2 (v2022.01.01) |
| Feb 3, 2023 | 2.05% (0.02046) | 78.85th | v2 (v2022.01.01) |
| Aug 28, 2022 | 1.76% (0.01761) | 75.51th | v2 (v2022.01.01) |
| May 27, 2022 | 1.82% (0.01819) | 75.35th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.83% (0.01832) | 75.09th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.83% (0.01832) | 54.44th | v2 (v2022.01.01) |
References (8)
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.3 x_refsource_CONFIRM
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2b472611a32a72f4a118c069c2d62a1a3f087afd x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2011/06/06/1 mailing-listx_refsource_MLIST
- https://access.redhat.com/security/cve/CVE-2011-2183 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=710338 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/2b472611a32a72f4a118c069c2d62a1a3f087afd x_refsource_CONFIRMPatch
- https://nvd.nist.gov/vuln/detail/CVE-2011-2183
- https://www.cve.org/CVERecord?id=CVE-2011-2183
| Link | Providers | Tags |
|---|---|---|
| http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.3 | x_refsource_CONFIRM | |
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2b472611a32a72f4a118c069c2d62a1a3f087afd | x_refsource_CONFIRM | |
| http://www.openwall.com/lists/oss-security/2011/06/06/1 | mailing-listx_refsource_MLIST | |
| https://access.redhat.com/security/cve/CVE-2011-2183 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=710338 | x_refsource_CONFIRMIssue Tracking | |
| https://github.com/torvalds/linux/commit/2b472611a32a72f4a118c069c2d62a1a3f087afd | x_refsource_CONFIRMPatch | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-2183 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-2183 |
Change history (0)
No recorded changes yet.