kernel: x86: espfix(64) bypass via set_thread_area and CLONE_SETTLS
Published Dec 17, 2014
2.1
LOWCVSS 2.0
EPSS 0.58%
Description
arch/x86/kernel/tls.c in the Thread Local Storage (TLS) implementation in the Linux kernel through 3.18.1 allows local users to bypass the espfix protection mechanism, and consequently makes it easier for local users to bypass the ASLR protection mechanism, via a crafted application that makes a set_thread_area system call and later reads a 16-bit value.
Affected products
No data.
- ≤ 3.18.1
- 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
- 3.0.9
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- 3.0.14
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- 3.0.18
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- 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
- 3.0.35
- 3.0.36
- 3.0.37
- 3.0.38
- 3.0.39
- 3.0.40
- 3.0.41
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- 3.0.43
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- 3.0.48
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- 3.0.58
- 3.0.59
- 3.0.60
- 3.0.61
- 3.0.62
- 3.0.63
- 3.0.64
- 3.0.65
- 3.0.66
- 3.0.67
- 3.0.68
- 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
- 3.2.1
- 3.2.1
- 3.2.2
- 3.2.3
- 3.2.4
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- 3.2.30
- 3.3
- 3.3
- 3.3
- 3.3
- 3.3
- 3.3
- 3.3
- 3.3
- 3.3.1
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- 3.3.3
- 3.3.4
- 3.3.5
- 3.3.6
- 3.3.7
- 3.3.8
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4.1
- 3.4.1
- 3.4.2
- 3.4.2
- 3.4.3
- 3.4.3
- 3.4.4
- 3.4.4
- 3.4.5
- 3.4.5
- 3.4.6
- 3.4.7
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- 3.4.59
- 3.4.60
- 3.4.61
- 3.4.62
- 3.4.63
- 3.4.64
- 3.4.65
- 3.4.66
- 3.4.67
- 3.4.68
- 3.4.69
- 3.4.70
- 3.4.71
- 3.4.72
- 3.4.73
- 3.4.74
- 3.4.75
- 3.4.76
- 3.4.77
- 3.4.78
- 3.4.79
- 3.5.1
- 3.5.2
- 3.5.3
- 3.5.4
- 3.5.5
- 3.5.6
- 3.5.7
- 3.6
- 3.6.1
- 3.6.2
- 3.6.3
- 3.6.4
- 3.6.5
- 3.6.6
- 3.6.7
- 3.6.8
- 3.6.9
- 3.6.10
- 3.6.11
- 3.7
- 3.7.1
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- 3.8.0
- 3.8.1
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- 3.8.13
- 3.9
- 3.9
- 3.9
- 3.9
- 3.9
- 3.9
- 3.9
- 3.9.0
- 3.9.0
- 3.9.1
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- 3.9.2
- 3.9.3
- 3.9.3
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- 3.9.9
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- 3.9.11
- 3.9.11
- 3.10
- 3.10.0
- 3.10.1
- 3.10.1
- 3.10.2
- 3.10.2
- 3.10.3
- 3.10.3
- 3.10.4
- 3.10.4
- 3.10.5
- 3.10.5
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- 3.10.7
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- 3.10.9
- 3.10.9
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- 3.10.23
- 3.10.24
- 3.10.25
- 3.10.26
- 3.10.27
- 3.10.28
- 3.10.29
- 3.11
- 3.11.1
- 3.11.2
- 3.11.3
- 3.11.4
- 3.11.5
- 3.11.6
- 3.11.7
- 3.11.8
- 3.11.9
- 3.11.10
- 3.12
- 3.12.1
- 3.12.2
- 3.12.3
- 3.12.4
- 3.12.5
- 3.12.6
- 3.12.7
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- 3.12.14
- 3.12.15
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- 3.12.17
- 3.13
- 3.13.1
- 3.13.2
- 3.13.3
- 3.13.4
- 3.13.5
- 3.13.6
- 3.13.7
- 3.13.8
- 3.13.9
- 3.13.10
- 3.13.11
- 3.14
- 3.14
- 3.14
- 3.14
- 3.14
- 3.14
- 3.14
- 3.14
- 3.14
- 3.14.1
- 3.14.2
- 3.14.3
- 3.14.4
- 3.14.5
- 3.15
- 3.15.1
- 3.15.2
- 3.15.3
- 3.15.4
- 3.15.5
- 3.15.6
- 3.15.7
- 3.15.8
- 3.16.0
- 3.16.1
- 3.17
- 3.17.1
- 3.17.2
- 3.17.3
- 3.17.3
- 3.17.4
- 3.18
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-573.el6
Fixed · RHSA-2015:1272
Red Hat Enterprise Linux 5
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise MRG 2
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-573.el6 | Fixed | RHSA-2015:1272 |
| Red Hat Enterprise Linux 5 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise Linux MRG 2. Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
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:P/A:N
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 | 0.58% (0.00583) | 45.89th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.58% (0.00583) | 43.09th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.04% (0.00043) | 10.09th | 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 (22)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=41bdc78544b8a93a9c6814b8bbbfef966272abbe x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2015-1272.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/62801 third-party-advisoryx_refsource_SECUNIA
- http://www.debian.org/security/2015/dsa-3128 vendor-advisoryx_refsource_DEBIAN
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:058 vendor-advisoryx_refsource_MANDRIVA
- http://www.openwall.com/lists/oss-security/2014/12/15/6 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/71684 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-2490-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2491-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2492-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2493-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2515-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2516-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2517-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2518-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2014-8133 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1172797 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/41bdc78544b8a93a9c6814b8bbbfef966272abbe x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2014-8133
- https://www.cve.org/CVERecord?id=CVE-2014-8133
Change history (0)
No recorded changes yet.