Medium severity5.5NVD Advisory· Published Apr 6, 2009· Updated Jun 16, 2026

CVE-2009-1243

Description

net/ipv4/udp.c in the Linux kernel before 2.6.29.1 performs an unlocking step in certain incorrect circumstances, which allows local users to cause a denial of service (panic) by reading zero bytes from the /proc/net/udp file and unspecified other files, related to the "udp seq_file infrastructure."

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Linux/Kernel2 versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: <2.6.29.1
- (no CPE)range: <2.6.29.1

Patches

Vulnerability mechanics

References

openwall.com/lists/oss-security/2009/04/01/4nvdMailing ListPatchThird Party Advisory
vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-proc-net-udp-8586nvdPatchThird Party Advisory
www.securityfocus.com/bid/34329nvdBroken LinkPatchThird Party AdvisoryVDB Entry
secunia.com/advisories/34478nvdBroken LinkThird Party Advisory
www.vupen.com/english/advisories/2009/0924nvdBroken LinkThird Party Advisory
exchange.xforce.ibmcloud.com/vulnerabilities/49595nvdThird Party AdvisoryVDB Entry
git.kernel.orgnvdBroken Link
www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.29.1nvdBroken Link

News mentions

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