Linux kernel before 2.6.16.5 does not properly handle uncanonical return addresses on Intel EM64T CPUs, which reports an exception in the…

Description

Linux kernel before 2.6.16.5 does not properly handle uncanonical return addresses on Intel EM64T CPUs, which reports an exception in the SYSRET instead of the next instruction, which causes the kernel exception handler to run on the user stack with the wrong GS.

Scores

EPSS (exploitation in 30 days)

0.48% · top 59% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.9.

Weakness

• n/a
• CWE-20 (opens in a new tab)All about CWE-20 and its CVEs

Affected products

• n/a

  • affected n/a

References (32)

• http://support.avaya.com/elmodocs2/security/ASA-2006-161.htm (opens in a new tab)x_refsource_CONFIRMx_transferred
• linux-uncanonical-addr-dos(25869) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• RHSA-2006:0493 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2006:0437 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• SUSE-SA:2006:042 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 19735 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• ADV-2006-2554 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 20716 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• FEDORA-2006-423 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• 21745 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• SUSE-SA:2006:047 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 21136 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• MDKSA-2006:150 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• 19639 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• USN-302-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• 21983 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• SUSE-SA:2006:028 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• ADV-2006-1390 (opens in a new tab)vdb-entryx_refsource_VUPENx_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
• 17541 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.5 (opens in a new tab)x_refsource_CONFIRMx_transferred
• ADV-2006-1475 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 24639 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
• 21498 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 20237 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 20398 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• oval:org.mitre.oval:def:9732 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• MDKSA-2006:086 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• 20157 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 21179 (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)
• 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

[![CVE-2006-0744](https://trackcve.app/badge/CVE-2006-0744.svg)](https://trackcve.app/cve/CVE-2006-0744)

Record last updated 7 Aug 2024, 16:48 UTC.