CVE-2009-3623
The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel...
The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel before 2.6.31.2 attempts to access a credentials cache even when a client specifies the AUTH_NULL authentication flavor, which allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an NFSv4 mount request.
Exploit likelihood
What each source reports
NVD Score used
The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel before 2.6.31.2 attempts to access a credentials cache even when a client specifies the AUTH_NULL authentication flavor, which allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an NFSv4 mount request.
- Record
CVE-2009-3623- CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel before 2.6.31.2 attempts to access a credentials cache even when a client specifies the AUTH_NULL authentication flavor, which allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an NFSv4 mount request.
- Record
CVE-2009-3623- Updated
- 2026-11-02
EUVDEUVD-2009-3604 No score
The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel before 2.6.31.2 attempts to access a credentials cache even when a client specifies the AUTH_NULL authentication flavor, which allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an NFSv4 mount request.
- Record
EUVD-2009-3604- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4vrg-c54f-c5m9 No score
The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel...
The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel before 2.6.31.2 attempts to access a credentials cache even when a client specifies the AUTH_NULL authentication flavor, which allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an NFSv4 mount request.
- Record
GHSA-4vrg-c54f-c5m9- Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-3623 is a high vulnerability (CVSS 7.8) in Linux Kernel, published October 30, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.47%, the 89th percentile. No source names a fixed version.
References
git.kernel.org?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=886e3b7fe6054230c89ae078a09565ed183ecc73
ubuntu.com/usn/usn-864-1
marc.info?l=oss-security&m=125618753029631&w=2
kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1
bugzilla.redhat.com/show_bug.cgi?id=530269
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nvd.nist.gov/vuln/detail/CVE-2009-3623
access.redhat.com/security/cve/CVE-2009-3623
github.com/advisories/GHSA-4vrg-c54f-c5m9