Back
CVE-2012-4565
The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel before 3.4.19, when the net.ipv4.tcp_congestion_control…
Medium4.7EPSS 0.49%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel before 3.4.19, when the net.ipv4.tcp_congestion_control illinois setting is enabled, allows local users to cause a denial of service (divide-by-zero error and OOPS) by reading TCP stats.
Timeline
ID reserved
By redhat
- 4 months later
· 4 months later
Published
- 12 years later
· 12 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.7 | AV:L/AC:M/Au:N/C:N/I:N/A:C |
- EPSS (exploitation in 30 days)
- 0.49% · top 58% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.7.
Weakness
Affected products
n/a
- affected n/a
References (18)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-1644-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-1645-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.19 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-1647-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- RHSA-2012:1580 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- USN-1652-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://github.com/torvalds/linux/commit/8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=871848 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-1646-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-1651-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- FEDORA-2012-17479 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- USN-1648-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 56346 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- [oss-security] 20121031 Re: CVE Request -- kernel: net: divide by zero in tcp algorithm illinois (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- USN-1649-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-1650-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 51409 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_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://cveledger.app/cve/CVE-2012-4565)Record last updated .