Vulnerability Database

383,371

Total vulnerabilities in the database

CVE-2009-2406 — linux / kernel

Improper Restriction of Operations within the Bounds of a Memory Buffer

Stack-based buffer overflow in the parse_tag_11_packet function in fs/ecryptfs/keystore.c in the eCryptfs subsystem in the Linux kernel before 2.6.30.4 allows local users to cause a denial of service (system crash) or possibly gain privileges via vectors involving a crafted eCryptfs file, related to not ensuring that the key signature length in a Tag 11 packet is compatible with the key signature buffer size.

  • Published: Jul 31, 2009
  • Updated: Sep 13, 2026
  • CVE: CVE-2009-2406
  • Severity: Medium
  • Exploit:
  • CISA KEV:

CVSS v2:

  • Severity: Medium
  • Score: 6.9
  • AV:L/AC:M/Au:N/C:C/I:C/A:C

CWEs:

Software Affected versions
linux / kernel = 2.6.24.7
linux / kernel = 2.6.25.15
linux / linux_kernel <= 2.6.30.3
linux / linux_kernel = 2.2.6
linux / linux_kernel = 2.6
linux / linux_kernel = 2.6.0
linux / linux_kernel = 2.6.0-test1
linux / linux_kernel = 2.6.0-test10
linux / linux_kernel = 2.6.0-test11
linux / linux_kernel = 2.6.0-test2
linux / linux_kernel = 2.6.0-test3
linux / linux_kernel = 2.6.0-test4
linux / linux_kernel = 2.6.0-test5
linux / linux_kernel = 2.6.0-test6
linux / linux_kernel = 2.6.0-test7
linux / linux_kernel = 2.6.0-test8
linux / linux_kernel = 2.6.0-test9
linux / linux_kernel = 2.6.1
linux / linux_kernel = 2.6.1-rc1
linux / linux_kernel = 2.6.1-rc2
linux / linux_kernel = 2.6.1-rc3
linux / linux_kernel = 2.6.2
linux / linux_kernel = 2.6.2-rc1
linux / linux_kernel = 2.6.2-rc2
linux / linux_kernel = 2.6.2-rc3
linux / linux_kernel = 2.6.2.27.13
linux / linux_kernel = 2.6.3
linux / linux_kernel = 2.6.3-rc1
linux / linux_kernel = 2.6.3-rc2
linux / linux_kernel = 2.6.3-rc3
linux / linux_kernel = 2.6.3-rc4
linux / linux_kernel = 2.6.4
linux / linux_kernel = 2.6.4-rc1
linux / linux_kernel = 2.6.4-rc2
linux / linux_kernel = 2.6.4-rc3
linux / linux_kernel = 2.6.5
linux / linux_kernel = 2.6.5-rc1
linux / linux_kernel = 2.6.5-rc2
linux / linux_kernel = 2.6.5-rc3
linux / linux_kernel = 2.6.6
linux / linux_kernel = 2.6.6-rc1
linux / linux_kernel = 2.6.6-rc2
linux / linux_kernel = 2.6.6-rc3
linux / linux_kernel = 2.6.7
linux / linux_kernel = 2.6.7-rc1
linux / linux_kernel = 2.6.7-rc2
linux / linux_kernel = 2.6.7-rc3
linux / linux_kernel = 2.6.8
linux / linux_kernel = 2.6.8-rc1
linux / linux_kernel = 2.6.8-rc2
linux / linux_kernel = 2.6.8-rc3
linux / linux_kernel = 2.6.8-rc4
linux / linux_kernel = 2.6.8.1
linux / linux_kernel = 2.6.8.1.5
linux / linux_kernel = 2.6.9
linux / linux_kernel = 2.6.9-2.6.20
linux / linux_kernel = 2.6.9-rc1
linux / linux_kernel = 2.6.9-rc2
linux / linux_kernel = 2.6.9-rc3
linux / linux_kernel = 2.6.9-rc4
linux / linux_kernel = 2.6.10
linux / linux_kernel = 2.6.10-rc1
linux / linux_kernel = 2.6.10-rc2
linux / linux_kernel = 2.6.10-rc3
linux / linux_kernel = 2.6.11
linux / linux_kernel = 2.6.11-rc1
linux / linux_kernel = 2.6.11-rc2
linux / linux_kernel = 2.6.11-rc3
linux / linux_kernel = 2.6.11-rc4
linux / linux_kernel = 2.6.11-rc5
linux / linux_kernel = 2.6.11.1
linux / linux_kernel = 2.6.11.2
linux / linux_kernel = 2.6.11.3
linux / linux_kernel = 2.6.11.4
linux / linux_kernel = 2.6.11.5
linux / linux_kernel = 2.6.11.6
linux / linux_kernel = 2.6.11.7
linux / linux_kernel = 2.6.11.8
linux / linux_kernel = 2.6.11.9
linux / linux_kernel = 2.6.11.10
linux / linux_kernel = 2.6.11.11
linux / linux_kernel = 2.6.11.12
linux / linux_kernel = 2.6.11_rc1_bk6
linux / linux_kernel = 2.6.12
linux / linux_kernel = 2.6.12-rc1
linux / linux_kernel = 2.6.12-rc2
linux / linux_kernel = 2.6.12-rc3
linux / linux_kernel = 2.6.12-rc4
linux / linux_kernel = 2.6.12-rc5
linux / linux_kernel = 2.6.12-rc6
linux / linux_kernel = 2.6.12.1
linux / linux_kernel = 2.6.12.2
linux / linux_kernel = 2.6.12.3
linux / linux_kernel = 2.6.12.4
linux / linux_kernel = 2.6.12.5
linux / linux_kernel = 2.6.12.6
linux / linux_kernel = 2.6.12.12
linux / linux_kernel = 2.6.12.22
linux / linux_kernel = 2.6.13
linux / linux_kernel = 2.6.13-rc1
linux / linux_kernel = 2.6.13-rc2
linux / linux_kernel = 2.6.13-rc3
linux / linux_kernel = 2.6.13-rc4
linux / linux_kernel = 2.6.13-rc5
linux / linux_kernel = 2.6.13-rc6
linux / linux_kernel = 2.6.13-rc7
linux / linux_kernel = 2.6.13.1
linux / linux_kernel = 2.6.13.2
linux / linux_kernel = 2.6.13.3
linux / linux_kernel = 2.6.13.4
linux / linux_kernel = 2.6.13.5
linux / linux_kernel = 2.6.14
linux / linux_kernel = 2.6.14-rc1
linux / linux_kernel = 2.6.14-rc2
linux / linux_kernel = 2.6.14-rc3
linux / linux_kernel = 2.6.14-rc4
linux / linux_kernel = 2.6.14-rc5
linux / linux_kernel = 2.6.14.1
linux / linux_kernel = 2.6.14.2
linux / linux_kernel = 2.6.14.3
linux / linux_kernel = 2.6.14.4
linux / linux_kernel = 2.6.14.5
linux / linux_kernel = 2.6.14.6
linux / linux_kernel = 2.6.14.7
linux / linux_kernel = 2.6.15
linux / linux_kernel = 2.6.15-rc1
linux / linux_kernel = 2.6.15-rc2
linux / linux_kernel = 2.6.15-rc3
linux / linux_kernel = 2.6.15-rc4
linux / linux_kernel = 2.6.15-rc5
linux / linux_kernel = 2.6.15-rc6
linux / linux_kernel = 2.6.15-rc7
linux / linux_kernel = 2.6.15.1
linux / linux_kernel = 2.6.15.2
linux / linux_kernel = 2.6.15.3
linux / linux_kernel = 2.6.15.4
linux / linux_kernel = 2.6.15.5
linux / linux_kernel = 2.6.15.6
linux / linux_kernel = 2.6.15.7
linux / linux_kernel = 2.6.15.11
linux / linux_kernel = 2.6.16
linux / linux_kernel = 2.6.16-rc1
linux / linux_kernel = 2.6.16-rc2
linux / linux_kernel = 2.6.16-rc3
linux / linux_kernel = 2.6.16-rc4
linux / linux_kernel = 2.6.16-rc5
linux / linux_kernel = 2.6.16-rc6
linux / linux_kernel = 2.6.16.1
linux / linux_kernel = 2.6.16.2
linux / linux_kernel = 2.6.16.3
linux / linux_kernel = 2.6.16.4
linux / linux_kernel = 2.6.16.5
linux / linux_kernel = 2.6.16.6
linux / linux_kernel = 2.6.16.7
linux / linux_kernel = 2.6.16.8
linux / linux_kernel = 2.6.16.9
linux / linux_kernel = 2.6.16.10
linux / linux_kernel = 2.6.16.11
linux / linux_kernel = 2.6.16.12
linux / linux_kernel = 2.6.16.13
linux / linux_kernel = 2.6.16.14
linux / linux_kernel = 2.6.16.15
linux / linux_kernel = 2.6.16.16
linux / linux_kernel = 2.6.16.17
linux / linux_kernel = 2.6.16.18
linux / linux_kernel = 2.6.16.19
linux / linux_kernel = 2.6.16.20
linux / linux_kernel = 2.6.16.21
linux / linux_kernel = 2.6.16.22
linux / linux_kernel = 2.6.16.23
linux / linux_kernel = 2.6.16.24
linux / linux_kernel = 2.6.16.25
linux / linux_kernel = 2.6.16.26
linux / linux_kernel = 2.6.16.27
linux / linux_kernel = 2.6.16.28
linux / linux_kernel = 2.6.16.29
linux / linux_kernel = 2.6.16.30
linux / linux_kernel = 2.6.16.31
linux / linux_kernel = 2.6.16.32
linux / linux_kernel = 2.6.16.33
linux / linux_kernel = 2.6.16.34
linux / linux_kernel = 2.6.16.35
linux / linux_kernel = 2.6.16.36
linux / linux_kernel = 2.6.16.37
linux / linux_kernel = 2.6.16.38
linux / linux_kernel = 2.6.16.39
linux / linux_kernel = 2.6.16.40
linux / linux_kernel = 2.6.16.41
linux / linux_kernel = 2.6.16.42
linux / linux_kernel = 2.6.16.43
linux / linux_kernel = 2.6.16.44
linux / linux_kernel = 2.6.16.45
linux / linux_kernel = 2.6.16.46
linux / linux_kernel = 2.6.16.47
linux / linux_kernel = 2.6.16.48
linux / linux_kernel = 2.6.16.49
linux / linux_kernel = 2.6.16.50
linux / linux_kernel = 2.6.16.51
linux / linux_kernel = 2.6.16.52
linux / linux_kernel = 2.6.16.53
linux / linux_kernel = 2.6.16.54
linux / linux_kernel = 2.6.16.55
linux / linux_kernel = 2.6.16.56
linux / linux_kernel = 2.6.16.57
linux / linux_kernel = 2.6.16.58
linux / linux_kernel = 2.6.16.59
linux / linux_kernel = 2.6.16.60
linux / linux_kernel = 2.6.16.61
linux / linux_kernel = 2.6.16.62
linux / linux_kernel = 2.6.16_rc7
linux / linux_kernel = 2.6.17
linux / linux_kernel = 2.6.17-rc1
linux / linux_kernel = 2.6.17-rc2
linux / linux_kernel = 2.6.17-rc3
linux / linux_kernel = 2.6.17-rc4
linux / linux_kernel = 2.6.17-rc5
linux / linux_kernel = 2.6.17-rc6
linux / linux_kernel = 2.6.17.1
linux / linux_kernel = 2.6.17.2
linux / linux_kernel = 2.6.17.3
linux / linux_kernel = 2.6.17.4
linux / linux_kernel = 2.6.17.5
linux / linux_kernel = 2.6.17.6
linux / linux_kernel = 2.6.17.7
linux / linux_kernel = 2.6.17.8
linux / linux_kernel = 2.6.17.9
linux / linux_kernel = 2.6.17.10
linux / linux_kernel = 2.6.17.11
linux / linux_kernel = 2.6.17.12
linux / linux_kernel = 2.6.17.13
linux / linux_kernel = 2.6.17.14
linux / linux_kernel = 2.6.18
linux / linux_kernel = 2.6.18-rc1
linux / linux_kernel = 2.6.18-rc2
linux / linux_kernel = 2.6.18-rc3
linux / linux_kernel = 2.6.18-rc4
linux / linux_kernel = 2.6.18-rc5
linux / linux_kernel = 2.6.18-rc6
linux / linux_kernel = 2.6.18-rc7
linux / linux_kernel = 2.6.18.0
linux / linux_kernel = 2.6.18.1
linux / linux_kernel = 2.6.18.2
linux / linux_kernel = 2.6.18.3
linux / linux_kernel = 2.6.18.4
linux / linux_kernel = 2.6.18.5
linux / linux_kernel = 2.6.18.6
linux / linux_kernel = 2.6.18.7
linux / linux_kernel = 2.6.18.8
linux / linux_kernel = 2.6.19
linux / linux_kernel = 2.6.19-rc1
linux / linux_kernel = 2.6.19-rc2
linux / linux_kernel = 2.6.19-rc3
linux / linux_kernel = 2.6.19-rc4
linux / linux_kernel = 2.6.19.1
linux / linux_kernel = 2.6.19.2
linux / linux_kernel = 2.6.19.3
linux / linux_kernel = 2.6.19.4
linux / linux_kernel = 2.6.19.5
linux / linux_kernel = 2.6.19.6
linux / linux_kernel = 2.6.19.7
linux / linux_kernel = 2.6.20
linux / linux_kernel = 2.6.20-rc2
linux / linux_kernel = 2.6.20.1
linux / linux_kernel = 2.6.20.2
linux / linux_kernel = 2.6.20.3
linux / linux_kernel = 2.6.20.4
linux / linux_kernel = 2.6.20.5
linux / linux_kernel = 2.6.20.6
linux / linux_kernel = 2.6.20.7
linux / linux_kernel = 2.6.20.8
linux / linux_kernel = 2.6.20.9
linux / linux_kernel = 2.6.20.10
linux / linux_kernel = 2.6.20.11
linux / linux_kernel = 2.6.20.12
linux / linux_kernel = 2.6.20.13
linux / linux_kernel = 2.6.20.14
linux / linux_kernel = 2.6.20.15
linux / linux_kernel = 2.6.20.16
linux / linux_kernel = 2.6.20.17
linux / linux_kernel = 2.6.20.18
linux / linux_kernel = 2.6.20.19
linux / linux_kernel = 2.6.20.20
linux / linux_kernel = 2.6.20.21
linux / linux_kernel = 2.6.21
linux / linux_kernel = 2.6.21-git1
linux / linux_kernel = 2.6.21-git2
linux / linux_kernel = 2.6.21-git3
linux / linux_kernel = 2.6.21-git4
linux / linux_kernel = 2.6.21-git5
linux / linux_kernel = 2.6.21-git6
linux / linux_kernel = 2.6.21-git7
linux / linux_kernel = 2.6.21-rc3
linux / linux_kernel = 2.6.21-rc4
linux / linux_kernel = 2.6.21-rc5
linux / linux_kernel = 2.6.21-rc6
linux / linux_kernel = 2.6.21-rc7
linux / linux_kernel = 2.6.21.1
linux / linux_kernel = 2.6.21.2
linux / linux_kernel = 2.6.21.3
linux / linux_kernel = 2.6.21.4
linux / linux_kernel = 2.6.21.5
linux / linux_kernel = 2.6.21.6
linux / linux_kernel = 2.6.21.7
linux / linux_kernel = 2.6.22
linux / linux_kernel = 2.6.22-rc6
linux / linux_kernel = 2.6.22.1
linux / linux_kernel = 2.6.22.2
linux / linux_kernel = 2.6.22.3
linux / linux_kernel = 2.6.22.4
linux / linux_kernel = 2.6.22.5
linux / linux_kernel = 2.6.22.6
linux / linux_kernel = 2.6.22.7
linux / linux_kernel = 2.6.22.10
linux / linux_kernel = 2.6.22.11
linux / linux_kernel = 2.6.22.12
linux / linux_kernel = 2.6.22.13
linux / linux_kernel = 2.6.22.14
linux / linux_kernel = 2.6.22.15
linux / linux_kernel = 2.6.22.16
linux / linux_kernel = 2.6.22.17
linux / linux_kernel = 2.6.22.18
linux / linux_kernel = 2.6.22.19
linux / linux_kernel = 2.6.22.20
linux / linux_kernel = 2.6.22.21
linux / linux_kernel = 2.6.22.22
linux / linux_kernel = 2.6.23
linux / linux_kernel = 2.6.23-rc1
linux / linux_kernel = 2.6.23-rc2
linux / linux_kernel = 2.6.23.1
linux / linux_kernel = 2.6.23.2
linux / linux_kernel = 2.6.23.3
linux / linux_kernel = 2.6.23.4
linux / linux_kernel = 2.6.23.5
linux / linux_kernel = 2.6.23.6
linux / linux_kernel = 2.6.23.7
linux / linux_kernel = 2.6.23.9
linux / linux_kernel = 2.6.23.14
linux / linux_kernel = 2.6.24-rc2
linux / linux_kernel = 2.6.24-rc3
linux / linux_kernel = 2.6.27-rc1
linux / linux_kernel = 2.6.27-rc2
linux / linux_kernel = 2.6.27-rc3
linux / linux_kernel = 2.6.27-rc4
linux / linux_kernel = 2.6.27-rc5
linux / linux_kernel = 2.6.27-rc6
linux / linux_kernel = 2.6.27-rc7
linux / linux_kernel = 2.6.27-rc8
linux / linux_kernel = 2.6.27-rc9
linux / linux_kernel = 2.6.27.2
linux / linux_kernel = 2.6.27.3
linux / linux_kernel = 2.6.27.4
linux / linux_kernel = 2.6.27.5
linux / linux_kernel = 2.6.27.6
linux / linux_kernel = 2.6.27.7
linux / linux_kernel = 2.6.27.8
linux / linux_kernel = 2.6.27.9
linux / linux_kernel = 2.6.27.20
linux / linux_kernel = 2.6.27.21
linux / linux_kernel = 2.6.27.22
linux / linux_kernel = 2.6.27.23
linux / linux_kernel = 2.6.27.24
linux / linux_kernel = 2.6.28
linux / linux_kernel = 2.6.28-git7
linux / linux_kernel = 2.6.28-rc1
linux / linux_kernel = 2.6.28-rc2
linux / linux_kernel = 2.6.28-rc3
linux / linux_kernel = 2.6.28-rc4
linux / linux_kernel = 2.6.28-rc5
linux / linux_kernel = 2.6.28-rc6
linux / linux_kernel = 2.6.28-rc7
linux / linux_kernel = 2.6.28.1
linux / linux_kernel = 2.6.28.2
linux / linux_kernel = 2.6.28.3
linux / linux_kernel = 2.6.28.4
linux / linux_kernel = 2.6.28.5
linux / linux_kernel = 2.6.28.6
linux / linux_kernel = 2.6.28.7
linux / linux_kernel = 2.6.28.8
linux / linux_kernel = 2.6.28.9
linux / linux_kernel = 2.6.28.10
linux / linux_kernel = 2.6.29
linux / linux_kernel = 2.6.29-git1
linux / linux_kernel = 2.6.29-rc1
linux / linux_kernel = 2.6.29-rc2
linux / linux_kernel = 2.6.29-rc2_git7
linux / linux_kernel = 2.6.29-rc8-kk
linux / linux_kernel = 2.6.29.3
linux / linux_kernel = 2.6.29.rc1
linux / linux_kernel = 2.6.29.rc2
linux / linux_kernel = 2.6.29.rc2-git1
linux / linux_kernel = 2.6.30-rc3
linux / linux_kernel = 2.6.30.1
linux / linux_kernel = 2.6.30.2
linux / linux_kernel = 2.6_test9_cvs

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.