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CVE-2009-4272
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…
High7.5EPSS 11.1%
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 11.1% · top 4.1% of all CVEs (6 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
n/a
- affected n/a
References (12)
- https://bugzilla.redhat.com/show_bug.cgi?id=545411 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://support.avaya.com/css/P8/documents/100073666 (opens in a new tab)x_refsource_CONFIRMx_transferred
- linux-kernel-routing-dos(55808) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- [oss-security] 20100120 CVE-2009-4272 kernel: emergency route cache flushing leads to node deadlock (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b6280b47a7a42970d098a3059f4ebe7e55e90d8d (opens in a new tab)x_refsource_CONFIRMx_transferred
- oval:org.mitre.oval:def:11167 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- RHSA-2010:0095 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- oval:org.mitre.oval:def:7026 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- RHSA-2010:0046 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- [oss-security] 20100120 Re: CVE-2009-4272 kernel: emergency route cache flushing leads to node deadlock (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=73e42897e8e5619eacb787d2ce69be12f47cfc21 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2009-4272)Record last updated .