Vulnerability in Linux Kernel
CVE-2009-1243
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."
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (17.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.29.1 (Broken Link)
- secunia.com/advisories/34478 (Third Party Advisory, Broken Link, third-party-advisory)
- openwall.com/lists/oss-security/2009/04/01/4 (mailing-list, Patch, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/34329 (Patch, VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- exchange.xforce.ibmcloud.com/vulnerabilities/49595 (VDB Entry, Third Party Advisory, vdb-entry)
- git.kernel.org/ (Broken Link)
- vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-proc-net-udp-8586 (Patch, Third Party Advisory)
- www.vupen.com/english/advisories/2009/0924 (Third Party Advisory, vdb-entry, Broken Link)
Frequently asked questions
- What is CVE-2009-1243?
- CVE-2009-1243 is a medium-severity vulnerability in Linux Kernel, classified under Improper Locking. CVSS score: 5.5/10. Published 2009-04-06.
- How severe is CVE-2009-1243?
- Medium severity. CVSS v3 base score is 5.5 out of 10.