kernel: block: CLONE_IO io_context refcounting issues
Published May 17, 2012
5.5
MEDIUMCVSS 3.1
EPSS 0.47%
Description
The I/O implementation for block devices in the Linux kernel before 2.6.33 does not properly handle the CLONE_IO feature, which allows local users to cause a denial of service (I/O instability) by starting multiple processes that share an I/O context.
Affected products
No data.
Configuration 1
- < 2.6.33
Configuration 2
- 10.04
Configuration 3
- 6.0
Configuration 4
- 11
- 11
- 11
- 11
- 11
- 11
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-220.13.1.el6
Fixed · RHSA-2012:0481
Red Hat Enterprise Linux 4
kernel
Not affected
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-220.13.1.el6 | Fixed | RHSA-2012:0481 |
| Red Hat Enterprise Linux 4 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 5 | 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 affects the Linux kernel as shipped with Red Hat Enterprise Linux 6. This issue does not affect the Linux kernel as shipped with Red Hat Enterprise Linux 4 and 5 as they did not provide support for CLONE_IO. This issue does not affect the Linux kernel as shipped with Red Hat Enterprise MRG as they already contain the fix. This has been addressed in Red Hat Enterprise Linux 6 via https://rhn.redhat.com/errata/RHSA-2012-0481.html.
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 | 0.47% (0.00468) | 38.17th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.47% (0.00468) | 36.66th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.01% (0.00011) | 0.66th | 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 (21)
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.33 x_refsource_CONFIRMBroken Link
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=61cc74fbb87af6aa551a06a370590c9bc07e29d9 x_refsource_CONFIRM
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b69f2292063d2caf37ca9aec7d63ded203701bf3 x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://marc.info/?l=bugtraq&m=139447903326211&w=2 vendor-advisoryx_refsource_HPMailing ListThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2012-0481.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2012-0531.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://secunia.com/advisories/48545 third-party-advisoryx_refsource_SECUNIANot Applicable
- http://secunia.com/advisories/48842 third-party-advisoryx_refsource_SECUNIANot Applicable
- http://www.debian.org/security/2012/dsa-2469 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.openwall.com/lists/oss-security/2012/02/23/5 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securitytracker.com/id?1027086 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-1408-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-1410-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-1411-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2012-0879 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=796829 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/61cc74fbb87af6aa551a06a370590c9bc07e29d9 x_refsource_CONFIRMPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/b69f2292063d2caf37ca9aec7d63ded203701bf3 x_refsource_CONFIRMPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2012-0879
- https://www.cve.org/CVERecord?id=CVE-2012-0879
Change history (0)
No recorded changes yet.