{"id":"CVE-2009-0778","aliases":["EUVD-2009-0778","GHSA-2327-m5w2-rg7f","RHSA-2009:0326","RHSA-2010:0079"],"status":"published","title":"The icmp_send function in net/ipv4/icmp.c in the Linux kernel before 2.6.25, when configured as a...","description":"The icmp_send function in net/ipv4/icmp.c in the Linux kernel before 2.6.25, when configured as a router with a REJECT route, does not properly manage the Protocol Independent Destination Cache (aka DST) in some situations involving transmission of an ICMP Host Unreachable message, which allows remote attackers to cause a denial of service (connectivity outage) by sending a large series of packets to many destination IP addresses within this REJECT route, related to an \"rt_cache leak.\"","severity":{"version":"2.0","score":7.1,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.04623,"percentile":0.91758,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2009-03-12T15:00:00Z","modified":"2026-06-29T10:02:58Z","affected":[{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::client","package":"kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.18-128.1.6.el5"}]}],"bundled":8},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::client","package":"kernel-PAE","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.18-128.1.6.el5"}]}],"bundled":8},{"source":"osv","ecosystem":"Red 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icmp_send function in net/ipv4/icmp.c in the Linux kernel before 2.6.25, when configured as a router with a REJECT route, does not properly manage the Protocol Independent Destination Cache (aka DST) in some situations involving transmission of an ICMP Host Unreachable message, which allows remote attackers to cause a denial of service (connectivity outage) by sending a large series of packets to many destination IP addresses within this REJECT route, related to an \"rt_cache leak.\"","status":"published","published":"2009-03-12T15:00:00Z","modified":"2024-08-07T04:48:52.114Z","updated_at":"2026-11-02T14:33:25.896677Z"}],"euvd":[{"id":"EUVD-2009-0778","description":"The icmp_send function in net/ipv4/icmp.c in the Linux kernel before 2.6.25, when configured as a router with a REJECT route, does not properly manage the Protocol Independent Destination Cache (aka DST) in some situations involving transmission of an ICMP Host Unreachable message, which allows remote attackers to cause a denial of service (connectivity outage) by sending a large series of packets to many destination IP addresses within this REJECT route, related to an \"rt_cache leak.\"","status":"published","published":"2009-03-12T15:00:00Z","modified":"2024-08-07T04:48:52Z","updated_at":"2026-11-03T01:39:24.312317Z"}],"ghsa":[{"id":"GHSA-2327-m5w2-rg7f","title":"The icmp_send function in net/ipv4/icmp.c in the Linux kernel before 2.6.25, when configured as a...","description":"The icmp_send function in net/ipv4/icmp.c in the Linux kernel before 2.6.25, when configured as a router with a REJECT route, does not properly manage the Protocol Independent Destination Cache (aka DST) in some situations involving transmission of an ICMP Host Unreachable message, which allows remote attackers to cause a denial of service (connectivity outage) by sending a large series of packets to many destination IP addresses within this REJECT route, related to an \"rt_cache 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