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Vulnerability record · CVE-2018-16949 · published 12 September 2018

CVE-2018-16949: Openafs uncontrolled resource consumption vulnerability

OOpenafs · Openafs

An issue was discovered in OpenAFS before 1.6.23 and 1.8.x before 1.8.2. Several data types used as RPC input variables were implemented as unbounded array types, limited only by the inherent 32-bit length field to 4 GB. An unauthenticated attacker could send, or claim to send, large input values and consume server resources waiting for those inputs, denying service to other valid connections.

7.5 CVSS 3.0 High EPSS 3.1% · top 12.8% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.0 base score, v2 5.0
3.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in OpenAFS before 1.6.23 and 1.8.x before 1.8.2. Several data types used as RPC input variables were implemented as unbounded array types, limited only by the inherent 32-bit length field to 4 GB. An unauthenticated attacker could send, or claim to send, large input values and consume server resources waiting for those inputs, denying service to other valid connections.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://openafs.org/pages/security/OPENAFS-SA-2018-003.txt Vendor Advisory
http://www.securityfocus.com/bid/106375 Third Party AdvisoryVDB Entry
https://lists.debian.org/debian-lts-announce/2018/09/msg00024.html Mailing ListThird Party Advisory
https://www.debian.org/security/2018/dsa-4302 Third Party Advisory
http://openafs.org/pages/security/OPENAFS-SA-2018-003.txt Vendor Advisory
http://www.securityfocus.com/bid/106375 Third Party AdvisoryVDB Entry
https://lists.debian.org/debian-lts-announce/2018/09/msg00024.html Mailing ListThird Party Advisory
https://www.debian.org/security/2018/dsa-4302 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-16949), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.