CVE-2009-2844: Vulnerabilities in the kernel
Published Aug 18, 2009
7.8
HIGHCVSS 2.0
EPSS 3.36%
Description
cfg80211 in net/wireless/scan.c in the Linux kernel 2.6.30-rc1 and other versions before 2.6.31-rc6 allows remote attackers to cause a denial of service (crash) via a sequence of beacon frames in which one frame omits an SSID Information Element (IE) and the subsequent frame contains an SSID IE, which triggers a NULL pointer dereference in the cmp_ies function. NOTE: a potential weakness in the is_mesh function was also addressed, but the relevant condition did not exist in the code, so it is not a vulnerability.
Affected products
No data.
- 2.6.24.7
- 2.6.25.15
- ≤ 2.6.16.31
- 2.6
- 2.6.0
- 2.6.1
- 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
- 2.6.16.10
- 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
- 2.6.16.31
- 2.6.16.31
- 2.6.16.31
- 2.6.16.31
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. Please note this issue only affected Linux kernel versions after v2.6.30-rc1 and was fixed in v2.6.31-rc6.
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: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 2, 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 2, 2026 | 3.36% (0.03357) | 88.32th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.36% (0.03357) | 87.11th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.91% (0.01914) | 82.09th | v4 (v2025.03.14) |
| Dec 12, 2024 | 4.95% (0.04954) | 93.12th | v3 (v2023.03.01) |
| Nov 8, 2023 | 4.95% (0.04954) | 91.94th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.16% (0.03163) | 89.60th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
References (11)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=cd3468bad96c00b5a512f551674f36776129520e x_refsource_CONFIRM
- http://jon.oberheide.org/files/cfg80211-remote-dos.c x_refsource_MISCPatch
- http://secunia.com/advisories/36278 third-party-advisoryx_refsource_SECUNIA
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.5 x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2009/08/17/1 mailing-listx_refsource_MLISTPatch
- http://www.openwall.com/lists/oss-security/2009/08/17/2 mailing-listx_refsource_MLISTPatch
- http://www.securityfocus.com/bid/36052 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2009-2844 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=518271 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2009-2844
- https://www.cve.org/CVERecord?id=CVE-2009-2844
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=cd3468bad96c00b5a512f551674f36776129520e | x_refsource_CONFIRM | |
| http://jon.oberheide.org/files/cfg80211-remote-dos.c | x_refsource_MISCPatch | |
| http://secunia.com/advisories/36278 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.5 | x_refsource_CONFIRM | |
| http://www.openwall.com/lists/oss-security/2009/08/17/1 | mailing-listx_refsource_MLISTPatch | |
| http://www.openwall.com/lists/oss-security/2009/08/17/2 | mailing-listx_refsource_MLISTPatch | |
| http://www.securityfocus.com/bid/36052 | vdb-entryx_refsource_BID | |
| https://access.redhat.com/security/cve/CVE-2009-2844 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=518271 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2009-2844 | ||
| https://www.cve.org/CVERecord?id=CVE-2009-2844 |
Change history (0)
No recorded changes yet.