CVE-2009-3624

Medium

The get_instantiation_keyring function in security/keys/keyctl.c in the KEYS subsystem in the Linux kernel before 2.6.32-rc5 does not properly maintain the reference count of a keyring, which allows local users to gain privileges or cause a denial of service (OOPS) via vectors involving calls to this function without specifying a keyring by ID, as demonstrated by a series of keyctl request2 and keyctl list commands.

Package Linux Kernel
Published 2009-11-02
Last modified 2026-04-23
CVSS version 2.0
Patch available
Awaiting data

CVSS 2.0 score

4.6

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
User Interaction
Scope
Confidentiality
Low
Integrity
Availability
Vector string
AV:L/AC:L/Au:N/C:P/I:P/A:P

Weakness type

CWE-310

CVE-2009-3624 is classified as CWE-310

See CWE-310 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2009-3624 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Frequently asked questions

  • What is CVE-2009-3624?

    CVE-2009-3624 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.6 out of 10 . CVE-2009-3624 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2009-3624?

    CVE-2009-3624 has a CVSS score of 4.6 out of 10, rated Medium severity (CVSS 2.0). The vector string is AV:L/AC:L/Au:N/C:P/I:P/A:P .

  • Is there a patch available for CVE-2009-3624?

    No patch is currently available for CVE-2009-3624. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2009-3624 actively exploited?

    No — CVE-2009-3624 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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