kernel: jbd2: unmapped buffer with _Unwritten or _Delay flags set can lead to DoS
Published Jul 3, 2012
4.9
MEDIUMCVSS 2.0
EPSS 0.39%
Description
The journal_unmap_buffer function in fs/jbd2/transaction.c in the Linux kernel before 3.3.1 does not properly handle the _Delay and _Unwritten buffer head states, which allows local users to cause a denial of service (system crash) by leveraging the presence of an ext4 filesystem that was mounted with a journal.
Affected products
No data.
- ≤ 3.3
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
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- 3.0.14
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- 3.0.16
- 3.0.17
- 3.0.18
- 3.0.19
- 3.0.20
- 3.0.21
- 3.0.22
- 3.0.23
- 3.0.24
- 3.0.25
- 3.0.26
- 3.0.27
- 3.0.28
- 3.0.29
- 3.0.30
- 3.0.31
- 3.0.32
- 3.0.33
- 3.0.34
- 3.1
- 3.1
- 3.1
- 3.1
- 3.1
- 3.1.1
- 3.1.2
- 3.1.3
- 3.1.4
- 3.1.5
- 3.1.6
- 3.1.7
- 3.1.8
- 3.1.9
- 3.1.10
- 3.2
- 3.2
- 3.2
- 3.2
- 3.2
- 3.2
- 3.2
- 3.2.1
- 3.2.2
- 3.2.3
- 3.2.4
- 3.2.5
- 3.2.6
- 3.2.7
- 3.2.8
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- 3.2.11
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- 3.2.13
- 3.2.14
- 3.2.15
- 3.2.16
- 3.2.17
- 3.2.18
- 3.2.19
- 3.2.20
No data.
Red Hat Enterprise Linux 5
kernel-0:2.6.18-274.18.1.el5
Fixed · RHSA-2012:0107
Red Hat Enterprise Linux 6
kernel-0:2.6.32-220.17.1.el6
Fixed · RHSA-2012:0571
Red Hat Enterprise MRG 2
kernel-rt-0:3.0.30-rt50.62.el6rt
Fixed · RHSA-2012:0670
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-274.18.1.el5 | Fixed | RHSA-2012:0107 |
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-220.17.1.el6 | Fixed | RHSA-2012:0571 |
| Red Hat Enterprise MRG 2 | kernel-rt-0:3.0.30-rt50.62.el6rt | Fixed | RHSA-2012:0670 |
No package ranges for this CVE.
Remediation
Red Hat statement
This has been addressed in Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2012-0107.html, https://rhn.redhat.com/errata/RHSA-2012-0571.html, and https://rhn.redhat.com/errata/RHSA-2012-0670.html. Red Hat Enterprise Linux 4 is now in Production 3 of the maintenance life-cycle, https://access.redhat.com/support/policy/updates/errata/, therefore the fix for this issue is not currently planned to be included in the future updates.
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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.39% (0.00391) | 30.75th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.39% (0.00391) | 30.62th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.05% (0.00049) | 12.23th | 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 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.28% (0.01282) | 67.79th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.55% (0.01547) | 74.40th | 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 (14)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=15291164b22a357cb211b618adfef4fa82fc0de3 x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2012-0571.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2012-0670.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/48898 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/48964 third-party-advisoryx_refsource_SECUNIA
- http://www.debian.org/security/2012/dsa-2469 vendor-advisoryx_refsource_DEBIAN
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.1 x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2011-4086 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=749143 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/15291164b22a357cb211b618adfef4fa82fc0de3 x_refsource_CONFIRMPatch
- https://nvd.nist.gov/vuln/detail/CVE-2011-4086
- https://www.cve.org/CVERecord?id=CVE-2011-4086
Change history (0)
No recorded changes yet.