{"cve":"CVE-2009-4537","nvd":{"published":"2010-01-12T17:30:00.870","modified":"2026-06-16T23:13:50.970","status":"Modified","description":"drivers/net/r8169.c in the r8169 driver in the Linux kernel 2.6.32.3 and earlier does not properly check the size of an Ethernet frame that exceeds the MTU, which allows remote attackers to (1) cause a denial of service (temporary network outage) via a packet with a crafted size, in conjunction with certain packets containing A characters and certain packets containing E characters; or (2) cause a denial of service (system crash) via a packet with a crafted size, in conjunction with certain packets containing '\\0' characters, related to the value of the status register and erroneous behavior associated with the RxMaxSize register.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2009-1389.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://blog.c22.cc/2009/12/27/26c3-cat-procsysnetipv4fuckups/","http://events.ccc.de/congress/2009/Fahrplan/events/3596.en.html","http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035159.html","http://lists.opensuse.org/opensuse-security-announce/2010-07/msg00006.html","http://marc.info/?l=linux-netdev&m=126202972828626&w=2"],"products":["debian:debian_linux","linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T19:55:32.599380760+00:00"},"epss":{"cve":"CVE-2009-4537","score":0.05889,"percentile":0.93219,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}