What’s Vulnerable › Vulnerabilities

CVE-2006-0744

• Severity: medium (CVSS 4.9 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2006-04-18 · updated 2026-06-16
• Weakness: CWE-20

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.

Affected products

• Linux kernel: 2.6.0, 2.6.0-test1, 2.6.0-test10, 2.6.0-test11, 2.6.0-test2, 2.6.0-test3 (+132)

References

• http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.5
• http://lwn.net/Alerts/180820/
• http://secunia.com/advisories/19639
• http://secunia.com/advisories/19735
• http://secunia.com/advisories/20157
• http://secunia.com/advisories/20237
• http://secunia.com/advisories/20398
• http://secunia.com/advisories/20716
• http://secunia.com/advisories/20914
• http://secunia.com/advisories/21136
• http://secunia.com/advisories/21179
• http://secunia.com/advisories/21498

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