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CVE-2006-1242
The ip_push_pending_frames function in Linux 2.4.x and 2.6.x before 2.6.16 increments the IP ID field when sending a RST after receiving…
- 5.0MediumCVSS base score
- 3.5%Exploitation in 30 daysEPSS · top 11% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The ip_push_pending_frames function in Linux 2.4.x and 2.6.x before 2.6.16 increments the IP ID field when sending a RST after receiving unsolicited TCP SYN-ACK packets, which allows remote attackers to conduct an Idle Scan (nmap -sI) attack, which bypasses intended protections against such attacks.
Timeline
ID reserved
By mitre
Published
- 18 years later
· 18 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 | Medium5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
- EPSS (exploitation in 30 days)
- 3.5% · top 11% of all CVEs (12 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Affected products
n/a
- affected n/a
References
References28
- RHSA-2006:0437 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- ADV-2006-2554 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.1 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 20060315 Re: Linux zero IP ID vulnerability? (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- USN-281-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 21136 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 19402 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20060316 Re: Linux zero IP ID vulnerability? (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 21983 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 17109 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- DSA-1097 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- RHSA-2006:0575 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 20060314 Linux zero IP ID vulnerability? (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- SUSE-SA:2006:028 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 19955 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20060323 Re: Linux zero IP ID vulnerability? (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- http://support.avaya.com/elmodocs2/security/ASA-2006-180.htm (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-1103 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 21465 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- oval:org.mitre.oval:def:10317 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- ADV-2006-1140 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- http://support.avaya.com/elmodocs2/security/ASA-2006-200.htm (opens in a new tab)x_refsource_CONFIRMx_transferred
- 20398 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 22417 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- MDKSA-2006:086 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- 20671 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20157 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20914 (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)
- EUVD EUVD-2006-1246 (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-2006-1242)Record last updated .