CVE-2009-3624: n/a vulnerability

CVE-2009-3624: The get_instantiation_keyring function in security/keys/keyctl.c in the KEYS subsystem in the Linux kernel...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 06:38 UTC (UTC+00:00)

Security readout for executives and security teams

This Linux kernel flaw could let someone who already has local access crash the system or gain higher privileges. It comes from incorrect reference counting in the KEYS subsystem before Linux 2.6.32-rc5. The main business concern is older Linux hosts, appliances, or long-lived kernels that never received vendor backports. Exposure is most likely on legacy Linux systems running kernels before 2.6.32-rc5 or vendor kernels missing the backported fix. Network-only exposure is not supported by the sources; the described attacker is a local user. Prioritize remediation where old Linux kernels still support untrusted local users, shared hosting, jump boxes, or appliances. Modern fully patched distributions are less likely to be exposed, but legacy inventory should be verified rather than assumed safe. Mitigation focus: Apply the relevant vendor kernel security update for the affected distribution.; Confirm the kernel includes the upstream fix or a vendor backport.; Prioritize multi-user servers and systems allowing untrusted local shell access..

Prepared: Jun 28, 2026, 18:15 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 2, 2009, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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