MEDIUM
The tty_ldisc_hangup function in drivers/char/tty_ldisc.c in the Linux kernel 2.6.31-rc before 2.6.31-rc8 allows local users to cause a denial of service (system crash, sometimes preceded by a NULL pointer dereference) or possibly gain privileges via certain pseudo-terminal I/O activity, as demonstrated by KernelTtyTest.c
Published Sep 2, 2009
4.9
MEDIUMCVSS 2.0
EPSS 0.85%
Description
The tty_ldisc_hangup function in drivers/char/tty_ldisc.c in the Linux kernel 2.6.31-rc before 2.6.31-rc8 allows local users to cause a denial of service (system crash, sometimes preceded by a NULL pointer dereference) or possibly gain privileges via certain pseudo-terminal I/O activity, as demonstrated by KernelTtyTest.c.
Affected products
No data.
OR
- ≤ 2.6.31
- 2.6.0
- 2.6.1
- 2.6.2
- 2.6.3
- 2.6.4
- 2.6.5
- 2.6.6
- 2.6.7
- 2.6.8
- 2.6.8.1
- 2.6.9
- 2.6.10
- 2.6.11
- 2.6.11.1
- 2.6.11.2
- 2.6.11.3
- 2.6.11.4
- 2.6.11.5
- 2.6.11.6
- 2.6.11.7
- 2.6.11.8
- 2.6.11.9
- 2.6.11.10
- 2.6.11.11
- 2.6.11.12
- 2.6.12
- 2.6.12.1
- 2.6.12.2
- 2.6.12.3
- 2.6.12.4
- 2.6.12.5
- 2.6.12.6
- 2.6.13
- 2.6.13.1
- 2.6.13.2
- 2.6.13.3
- 2.6.13.4
- 2.6.13.5
- 2.6.14
- 2.6.14.1
- 2.6.14.2
- 2.6.14.3
- 2.6.14.4
- 2.6.14.5
- 2.6.14.6
- 2.6.14.7
- 2.6.15
- 2.6.15.1
- 2.6.15.2
- 2.6.15.3
- 2.6.15.4
- 2.6.15.5
- 2.6.15.6
- 2.6.15.7
- 2.6.16
- 2.6.16.1
- 2.6.16.2
- 2.6.16.3
- 2.6.16.4
- 2.6.16.5
- 2.6.16.6
- 2.6.16.7
- 2.6.16.8
- 2.6.16.9
- 2.6.16.10
- 2.6.16.11
- 2.6.16.12
- 2.6.16.13
- 2.6.16.14
- 2.6.16.15
- 2.6.16.16
- 2.6.16.17
- 2.6.16.18
- 2.6.16.19
- 2.6.16.20
- 2.6.16.21
- 2.6.16.22
- 2.6.16.23
- 2.6.16.24
- 2.6.16.25
- 2.6.16.26
- 2.6.16.27
- 2.6.16.28
- 2.6.16.29
- 2.6.16.30
- 2.6.16.31
- 2.6.16.32
- 2.6.16.33
- 2.6.16.34
- 2.6.16.35
- 2.6.16.36
- 2.6.16.37
- 2.6.16.38
- 2.6.16.39
- 2.6.16.40
- 2.6.16.41
- 2.6.16.42
- 2.6.16.43
- 2.6.16.44
- 2.6.16.45
- 2.6.16.46
- 2.6.16.47
- 2.6.16.48
- 2.6.16.49
- 2.6.16.50
- 2.6.16.51
- 2.6.16.52
- 2.6.16.53
- 2.6.16.54
- 2.6.16.55
- 2.6.16.56
- 2.6.16.57
- 2.6.16.58
- 2.6.16.59
- 2.6.16.60
- 2.6.16.61
- 2.6.16.62
- 2.6.17
- 2.6.17.1
- 2.6.17.2
- 2.6.17.3
- 2.6.17.4
- 2.6.17.5
- 2.6.17.6
- 2.6.17.7
- 2.6.17.8
- 2.6.17.9
- 2.6.17.10
- 2.6.17.11
- 2.6.17.12
- 2.6.17.13
- 2.6.17.14
- 2.6.18
- 2.6.18.1
- 2.6.18.2
- 2.6.18.3
- 2.6.18.4
- 2.6.18.5
- 2.6.18.6
- 2.6.18.7
- 2.6.18.8
- 2.6.19
- 2.6.19.1
- 2.6.19.2
- 2.6.19.3
- 2.6.19.4
- 2.6.19.5
- 2.6.19.6
- 2.6.19.7
- 2.6.20
- 2.6.20.1
- 2.6.20.2
- 2.6.20.3
- 2.6.20.4
- 2.6.20.5
- 2.6.20.6
- 2.6.20.7
- 2.6.20.8
- 2.6.20.9
- 2.6.20.10
- 2.6.20.11
- 2.6.20.12
- 2.6.20.13
- 2.6.20.14
- 2.6.20.15
- 2.6.20.16
- 2.6.20.17
- 2.6.20.18
- 2.6.20.19
- 2.6.20.20
- 2.6.20.21
- 2.6.21
- 2.6.21.1
- 2.6.21.2
- 2.6.21.3
- 2.6.21.4
- 2.6.21.5
- 2.6.21.6
- 2.6.21.7
- 2.6.22
- 2.6.22.1
- 2.6.22.2
- 2.6.22.3
- 2.6.22.4
- 2.6.22.5
- 2.6.22.6
- 2.6.22.7
- 2.6.22.8
- 2.6.22.9
- 2.6.22.10
- 2.6.22.11
- 2.6.22.12
- 2.6.22.13
- 2.6.22.14
- 2.6.22.15
- 2.6.22.16
- 2.6.22.17
- 2.6.22.18
- 2.6.22.19
- 2.6.23
- 2.6.23.1
- 2.6.23.2
- 2.6.23.3
- 2.6.23.4
- 2.6.23.5
- 2.6.23.6
- 2.6.23.7
- 2.6.23.8
- 2.6.23.9
- 2.6.23.10
- 2.6.23.11
- 2.6.23.12
- 2.6.23.13
- 2.6.23.14
- 2.6.23.15
- 2.6.23.16
- 2.6.23.17
- 2.6.24
- 2.6.24.1
- 2.6.24.2
- 2.6.24.3
- 2.6.24.4
- 2.6.24.5
- 2.6.24.6
- 2.6.24.7
- 2.6.25
- 2.6.25.1
- 2.6.25.2
- 2.6.25.3
- 2.6.25.4
- 2.6.25.5
- 2.6.25.6
- 2.6.25.7
- 2.6.25.8
- 2.6.25.9
- 2.6.25.10
- 2.6.25.11
- 2.6.25.12
- 2.6.25.13
- 2.6.25.14
- 2.6.25.15
- 2.6.25.16
- 2.6.25.17
- 2.6.25.18
- 2.6.25.19
- 2.6.25.20
- 2.6.26
- 2.6.26.1
- 2.6.26.2
- 2.6.26.3
- 2.6.26.4
- 2.6.26.5
- 2.6.26.6
- 2.6.26.7
- 2.6.26.8
- 2.6.27
- 2.6.27.1
- 2.6.27.2
- 2.6.27.3
- 2.6.27.4
- 2.6.27.5
- 2.6.27.6
- 2.6.27.7
- 2.6.27.8
- 2.6.27.9
- 2.6.27.10
- 2.6.27.11
- 2.6.27.12
- 2.6.27.13
- 2.6.27.14
- 2.6.27.15
- 2.6.27.16
- 2.6.27.17
- 2.6.27.18
- 2.6.27.19
- 2.6.27.20
- 2.6.27.21
- 2.6.27.22
- 2.6.27.23
- 2.6.27.24
- 2.6.27.25
- 2.6.27.26
- 2.6.27.27
- 2.6.27.28
- 2.6.27.29
- 2.6.27.30
- 2.6.27.31
- 2.6.28
- 2.6.28.1
- 2.6.28.2
- 2.6.28.3
- 2.6.28.4
- 2.6.28.5
- 2.6.28.6
- 2.6.28.7
- 2.6.28.8
- 2.6.28.9
- 2.6.28.10
- 2.6.29
- 2.6.29.1
- 2.6.29.2
- 2.6.29.3
- 2.6.29.4
- 2.6.29.5
- 2.6.29.6
- 2.6.30
- 2.6.30.1
- 2.6.30.2
- 2.6.30.3
- 2.6.30.4
- 2.6.30.5
- 2.6.31
- 2.6.31
- 2.6.31
- 2.6.31
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, 5 or Red Hat Enterprise MRG, as they do not contain a backport of the tty ldisc rewrite (upstream commits 65b770468e98 and cbe9352fa08f).
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.
4.9 MEDIUM NVD
AV:L/AC:L/Au:N/C:N/I:N/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.85% 0.00852
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.00852
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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.85% (0.00852) | 56.76th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.85% (0.00852) | 53.30th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.13% (0.00129) | 29.84th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00043) | 11.52th | v3 (v2023.03.01) |
| Jun 12, 2024 | 0.04% (0.00043) | 9.60th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00043) | 7.57th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.22% (0.03220) | 84.21th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.22% (0.03220) | 82.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.22% (0.03220) | 65.30th | v2 (v2022.01.01) |
Weaknesses (1)
References (12)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5c58ceff103d8a654f24769bb1baaf84a841b0cc x_refsource_CONFIRM
- http://lkml.org/lkml/2009/8/20/21 mailing-listx_refsource_MLISTExploit
- http://lkml.org/lkml/2009/8/20/27 mailing-listx_refsource_MLISTExploit
- http://lkml.org/lkml/2009/8/20/68 mailing-listx_refsource_MLIST
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc8 x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2009/08/31/1 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2009/09/03/6 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2009/09/03/7 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/36191 vdb-entryx_refsource_BIDExploitPatch
- https://access.redhat.com/security/cve/CVE-2009-3043 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2009-3043
- https://www.cve.org/CVERecord?id=CVE-2009-3043
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5c58ceff103d8a654f24769bb1baaf84a841b0cc | x_refsource_CONFIRM | |
| http://lkml.org/lkml/2009/8/20/21 | mailing-listx_refsource_MLISTExploit | |
| http://lkml.org/lkml/2009/8/20/27 | mailing-listx_refsource_MLISTExploit | |
| http://lkml.org/lkml/2009/8/20/68 | mailing-listx_refsource_MLIST | |
| http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc8 | x_refsource_CONFIRM | |
| http://www.openwall.com/lists/oss-security/2009/08/31/1 | mailing-listx_refsource_MLIST | |
| http://www.openwall.com/lists/oss-security/2009/09/03/6 | mailing-listx_refsource_MLIST | |
| http://www.openwall.com/lists/oss-security/2009/09/03/7 | mailing-listx_refsource_MLIST | |
| http://www.securityfocus.com/bid/36191 | vdb-entryx_refsource_BIDExploitPatch | |
| https://access.redhat.com/security/cve/CVE-2009-3043 | Vendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2009-3043 | ||
| https://www.cve.org/CVERecord?id=CVE-2009-3043 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Sep 2, 2009
Updated Aug 7, 2024
Reserved Sep 2, 2009
Link CVE-2009-3043
CISA Vulnrichment
Updated n/a