net/dns_resolver/dns_key.c in the Linux kernel before 2.6.38 allows remote DNS servers to cause a denial of service (NULL pointer dereference and OOPS) by not providing a valid response to a DNS query, as demonstrated by an erroneous grand.centrall.org query, which triggers improper handling of error data within a DNS resolver key
Published Oct 5, 2011
4.9
MEDIUMCVSS 2.0
EPSS 0.52%
Description
net/dns_resolver/dns_key.c in the Linux kernel before 2.6.38 allows remote DNS servers to cause a denial of service (NULL pointer dereference and OOPS) by not providing a valid response to a DNS query, as demonstrated by an erroneous grand.centrall.org query, which triggers improper handling of error data within a DNS resolver key.
Affected products
No data.
- < 2.6.38
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 4, 5, 6, or Red Hat Enterprise MRG as they did not backport the upstream commit 4a2d7892 that introduced this issue.
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 | 0.52% (0.00516) | 41.74th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.52% (0.00516) | 39.56th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.07% (0.00073) | 19.71th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.08% (0.00079) | 36.12th | v3 (v2023.03.01) |
| Oct 23, 2023 | 0.08% (0.00079) | 33.38th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00074) | 29.93th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
References (7)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1362fa078dae16776cd439791c6605b224ea6171 x_refsource_CONFIRM
- http://openwall.com/lists/oss-security/2011/03/04/13 mailing-listx_refsource_MLISTExploitMailing ListPatchThird Party Advisory
- http://securitytracker.com/id?1025162 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38 x_refsource_CONFIRMBroken Link
- https://access.redhat.com/security/cve/CVE-2011-1076 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2011-1076
- https://www.cve.org/CVERecord?id=CVE-2011-1076
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1362fa078dae16776cd439791c6605b224ea6171 | x_refsource_CONFIRM | |
| http://openwall.com/lists/oss-security/2011/03/04/13 | mailing-listx_refsource_MLISTExploitMailing ListPatchThird Party Advisory | |
| http://securitytracker.com/id?1025162 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38 | x_refsource_CONFIRMBroken Link | |
| https://access.redhat.com/security/cve/CVE-2011-1076 | Vendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-1076 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-1076 |
Change history (0)
No recorded changes yet.