kernel: rpc task leak after flock()ing NFS share
Published Mar 1, 2013
4.9
MEDIUMCVSS 2.0
EPSS 0.40%
Description
The Network Lock Manager (NLM) protocol implementation in the NFS client functionality in the Linux kernel before 3.0 allows local users to cause a denial of service (system hang) via a LOCK_UN flock system call.
Affected products
No data.
Configuration 1
- < 3.0
Configuration 2
- 5.0
- 5.0
- 5.0
No data.
Red Hat Enterprise Linux 5
kernel-0:2.6.18-274.3.1.el5
Fixed · RHSA-2011:1212
Red Hat Enterprise Linux 5.6 EUS - Server Only
kernel-0:2.6.18-238.31.1.el5
Fixed · RHSA-2011:1813
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 MRG 1
kernel-rt
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-274.3.1.el5 | Fixed | RHSA-2011:1212 |
| Red Hat Enterprise Linux 5.6 EUS - Server Only | kernel-0:2.6.18-238.31.1.el5 | Fixed | RHSA-2011:1813 |
| 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 MRG 1 | kernel-rt | Affected | n/a |
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: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 | 0.40% (0.00399) | 31.70th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.40% (0.00399) | 31.43th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.05% (0.00050) | 12.59th | 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://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0 x_refsource_CONFIRMBroken Link
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0b760113a3a155269a3fba93a409c640031dd68f x_refsource_CONFIRM
- http://rhn.redhat.com/errata/RHSA-2011-1212.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.openwall.com/lists/oss-security/2011/06/23/6 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2011-2491 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=709393 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/0b760113a3a155269a3fba93a409c640031dd68f x_refsource_CONFIRMPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2011-2491
- https://www.cve.org/CVERecord?id=CVE-2011-2491
| Link | Providers | Tags |
|---|---|---|
| http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0 | x_refsource_CONFIRMBroken Link | |
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0b760113a3a155269a3fba93a409c640031dd68f | x_refsource_CONFIRM | |
| http://rhn.redhat.com/errata/RHSA-2011-1212.html | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2011/06/23/6 | mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2011-2491 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=709393 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://github.com/torvalds/linux/commit/0b760113a3a155269a3fba93a409c640031dd68f | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-2491 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-2491 |
Change history (0)
No recorded changes yet.