kernel: bridge: null pointer dereference in __br_deliver
Published Jun 8, 2013
6.8
MEDIUMCVSS 2.0
EPSS 1.79%
Description
A certain Red Hat patch to the __br_deliver function in net/bridge/br_forward.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by leveraging connectivity to a network interface that uses an Ethernet bridge device.
Affected products
No data.
- 2.6.18
- 5
No data.
Red Hat Enterprise Linux 5
kernel-0:2.6.18-274.7.1.el5
Fixed · RHSA-2011:1386
Red Hat Enterprise Linux 4
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-274.7.1.el5 | Fixed | RHSA-2011:1386 |
| Red Hat Enterprise Linux 4 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | 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 did not affect the Linux kernel as shipped with Red Hat Enterprise Linux 4, 6, and Red Hat Enterprise MRG. This has been addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2011-1386.html.
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:N/AC:M/Au:N/C:P/I:P/A:P
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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.79% (0.01786) | 77.51th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.79% (0.01793) | 75.47th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.40% (0.00403) | 58.78th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.46% (0.00456) | 76.08th | v3 (v2023.03.01) |
| Apr 28, 2024 | 0.46% (0.00456) | 74.97th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.48% (0.00484) | 75.24th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.48% (0.00484) | 72.20th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.05% (0.01055) | 51.58th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.02% (0.01018) | 39.95th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
References (5)
- http://www.openwall.com/lists/oss-security/2011/10/24/3 mailing-listx_refsource_MLIST
- https://access.redhat.com/security/cve/CVE-2011-2942 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=730917 x_refsource_CONFIRMIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-2942
- https://www.cve.org/CVERecord?id=CVE-2011-2942
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2011/10/24/3 | mailing-listx_refsource_MLIST | |
| https://access.redhat.com/security/cve/CVE-2011-2942 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=730917 | x_refsource_CONFIRMIssue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-2942 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-2942 |
Change history (0)
No recorded changes yet.