CVE-2009-3624
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…
- 4.6MediumCVSS base score
- 0.37%Exploitation in 30 daysEPSS · top 68% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By redhat
- 24 days later
· 24 days later
Published
- 15 years later
· 15 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 0.37% · top 68% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.6.
Affected products
n/a
- affected n/a
References
References9
- [oss-security] 20091022 CVE request: kernel: get_instantiation_keyring() should inc the keyring refcount in all cases (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- USN-864-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- SUSE-SA:2010:001 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=21279cfa107af07ef985539ac0de2152b9cba5f5 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://twitter.com/spendergrsec/statuses/4916661870 (opens in a new tab)x_refsource_MISCx_transferred
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc5 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20091022 Re: CVE request: kernel: get_instantiation_keyring() should inc the keyring refcount in all cases (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 37086 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 38017 (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)
- EUVD EUVD-2009-3605 (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
[](https://cveledger.app/cve/CVE-2009-3624)Record last updated .