{"api_version":"1","generated_at":"2026-07-23T07:49:56+00:00","cve":"CVE-2009-2844","urls":{"html":"https://cve.report/CVE-2009-2844","api":"https://cve.report/api/cve/CVE-2009-2844.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2009-2844","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-2844"},"summary":{"title":"CVE-2009-2844","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.","state":"PUBLISHED","assigner":"mitre","published_at":"2009-08-18 21:00:00","updated_at":"2026-04-23 00:35:47"},"problem_types":["CWE-399","n/a"],"metrics":[{"version":"2.0","source":"nvd@nist.gov","type":"Primary","score":"7.8","severity":"","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","data":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:C","baseScore":7.8,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"COMPLETE"}}],"references":[{"url":"http://secunia.com/advisories/36278","name":"http://secunia.com/advisories/36278","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"Linux Kernel Multiple Vulnerabilities - Secunia Advisories - Vulnerability Information - 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zation":"Red Hat","lastmodified":"2009-08-19","contributor":"Mark J Cox","statementText":"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.","cve_year":"2009","cve_id":"2844","crc32":"53b809d1"}],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2024-08-07T06:07:37.259Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"name":"36278","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"],"url":"http://secunia.com/advisories/36278"},{"tags":["x_refsource_MISC","x_transferred"],"url":"http://jon.oberheide.org/files/cfg80211-remote-dos.c"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=cd3468bad96c00b5a512f551674f36776129520e"},{"name":"[oss-security] 20090817 Re: CVE request: kernel: cfg80211: missing NULL pointer checks","tags":["mailing-list","x_refsource_MLIST","x_transferred"],"url":"http://www.openwall.com/lists/oss-security/2009/08/17/2"},{"name":"[oss-security] 20090817 CVE request: kernel: cfg80211: missing NULL pointer checks","tags":["mailing-list","x_refsource_MLIST","x_transferred"],"url":"http://www.openwall.com/lists/oss-security/2009/08/17/1"},{"name":"36052","tags":["vdb-entry","x_refsource_BID","x_transferred"],"url":"http://www.securityfocus.com/bid/36052"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.5"}],"title":"CVE Program Container"}],"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"datePublic":"2009-07-29T00:00:00.000Z","descriptions":[{"lang":"en","value":"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.  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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.","Type":"Description","Title":"CVE-2009-2844"},{"CveYear":"2009","CveId":"2844","Ordinal":"2","NoteData":"2009-08-18","Type":"Other","Title":"Published"},{"CveYear":"2009","CveId":"2844","Ordinal":"3","NoteData":"2009-08-29","Type":"Other","Title":"Modified"}]}}}