CVE-2009-4272
High
Description
A certain Red Hat patch for net/ipv4/route.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 allows remote attackers to cause a denial of service (deadlock) via crafted packets that force collisions in the IPv4 routing hash table, and trigger a routing "emergency" in which a hash chain is too long. NOTE: this is related to an issue in the Linux kernel before 2.6.31, when the kernel routing cache is disabled, involving an uninitialized pointer and a panic.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Linux Kernel
PublishedJan 27, 2010
First seenJan 27, 2010
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 2.6.18 | — |
| redhat virtualization | 5.0 | — |
| redhat enterprise_linux_desktop | 5.0 | — |
| redhat enterprise_linux_eus | 5.4 | — |
| redhat enterprise_linux_server | 5.0 | — |
| redhat enterprise_linux_workstation | 5.0 | — |
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