{"id":"CVE-2009-3623","aliases":["EUVD-2009-3604","GHSA-4vrg-c54f-c5m9"],"status":"published","title":"The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel...","description":"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.","severity":{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03474,"percentile":0.89172,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2009-10-30T20:05:00Z","modified":"2026-06-16T23:12:02Z","products":[{"vendor":"linux","product":"linux_kernel"}],"references":[{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=886e3b7fe6054230c89ae078a09565ed183ecc73","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.ubuntu.com/usn/usn-864-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred"]},{"url":"http://marc.info/?l=oss-security\u0026m=125618753029631\u0026w=2","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"http://marc.info/?l=oss-security\u0026m=125624036516377\u0026w=2","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=530269","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.2","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=80fc015bdfe1f5b870c1e1ee02d78e709523fee7","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-3623"},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=80fc015bdfe1f5b870c1e1ee02d78e709523fee7"},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=886e3b7fe6054230c89ae078a09565ed183ecc73"},{"url":"https://access.redhat.com/security/cve/CVE-2009-3623"},{"url":"https://github.com/advisories/GHSA-4vrg-c54f-c5m9"}],"sources":{"cve":[{"id":"CVE-2009-3623","description":"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.","status":"published","published":"2009-10-30T20:05:00Z","modified":"2024-08-07T06:38:28.461Z","updated_at":"2026-11-02T14:33:23.749891Z"}],"euvd":[{"id":"EUVD-2009-3604","description":"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.","status":"published","published":"2009-10-30T20:05:00Z","modified":"2024-08-07T06:38:28Z","updated_at":"2026-11-03T01:39:13.262818Z"}],"ghsa":[{"id":"GHSA-4vrg-c54f-c5m9","title":"The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel...","description":"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.","status":"published","published":"2022-05-02T03:46:57Z","modified":"2023-02-10T05:06:02Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:54:00.189984Z"}],"nvd":[{"id":"CVE-2009-3623","description":"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.","status":"published","published":"2009-10-30T20:30:00.343Z","modified":"2026-06-16T23:12:02.5Z","cvss":[{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:01:37.004244Z"}]}}