CVE-2015-7763

rx/rx.c in OpenAFS 1.5.75 through 1.5.78, 1.6.x before 1.6.15, and 1.7.x before 1.7.33 does not properly initialize padding at the end of an Rx acknowledgement (ACK) packet, which allows remote attackers to obtain sensitive information by (1) conducting a replay attack or (2) sniffing the network.

Published: 2015-11-06 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-7763 is rated Moderate Risk (41.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.50%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-7763

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.94% 0.50% -0.44%
2 2025-03-29 0.50% 0.94% +0.44%
3 2025-03-17 — 0.50% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-7763

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2015-7763

OS Trackers for CVE-2015-7763

vendor priority summary link
debian not yet assigned CVE-2015-7763 not yet assigned priority: Debian including 1 source packages (openafs), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. https://security-tracker.debian.org/tracker/CVE-2015-7763
ubuntu medium CVE-2015-7763 medium priority: Ubuntu including 1 source packages (openafs), 6 status rows across 6 suites (precise, trusty, upstream, vivid, wily, xenial): released 3, ignored 2, not-affected 1. https://ubuntu.com/security/CVE-2015-7763

Affected software / configurations for CVE-2015-7763

Vendor Product Version Raw CPE
openafs openafs 1.5.75 cpe:2.3:a:openafs:openafs:1.5.75:*:*:*:*:*:*:*
openafs openafs 1.5.76 cpe:2.3:a:openafs:openafs:1.5.76:*:*:*:*:*:*:*
openafs openafs 1.5.77 cpe:2.3:a:openafs:openafs:1.5.77:*:*:*:*:*:*:*
openafs openafs 1.5.78 cpe:2.3:a:openafs:openafs:1.5.78:*:*:*:*:*:*:*
openafs openafs 1.6.0 cpe:2.3:a:openafs:openafs:1.6.0:*:*:*:*:*:*:*
openafs openafs 1.6.1 cpe:2.3:a:openafs:openafs:1.6.1:*:*:*:*:*:*:*
openafs openafs 1.6.2 cpe:2.3:a:openafs:openafs:1.6.2:*:*:*:*:*:*:*
openafs openafs 1.6.2.1 cpe:2.3:a:openafs:openafs:1.6.2.1:*:*:*:*:*:*:*
openafs openafs 1.6.3 cpe:2.3:a:openafs:openafs:1.6.3:*:*:*:*:*:*:*
openafs openafs 1.6.4 cpe:2.3:a:openafs:openafs:1.6.4:*:*:*:*:*:*:*
openafs openafs 1.6.5 cpe:2.3:a:openafs:openafs:1.6.5:*:*:*:*:*:*:*
openafs openafs 1.6.5.1 cpe:2.3:a:openafs:openafs:1.6.5.1:*:*:*:*:*:*:*
openafs openafs 1.6.5.2 cpe:2.3:a:openafs:openafs:1.6.5.2:*:*:*:*:*:*:*
openafs openafs 1.6.6 cpe:2.3:a:openafs:openafs:1.6.6:*:*:*:*:*:*:*
openafs openafs 1.6.7 cpe:2.3:a:openafs:openafs:1.6.7:*:*:*:*:*:*:*
openafs openafs 1.6.8 cpe:2.3:a:openafs:openafs:1.6.8:*:*:*:*:*:*:*
openafs openafs 1.6.9 cpe:2.3:a:openafs:openafs:1.6.9:*:*:*:*:*:*:*
openafs openafs 1.6.10 cpe:2.3:a:openafs:openafs:1.6.10:*:*:*:*:*:*:*
openafs openafs 1.6.11 cpe:2.3:a:openafs:openafs:1.6.11:*:*:*:*:*:*:*
openafs openafs 1.6.12 cpe:2.3:a:openafs:openafs:1.6.12:*:*:*:*:*:*:*
openafs openafs 1.6.13 cpe:2.3:a:openafs:openafs:1.6.13:*:*:*:*:*:*:*
openafs openafs 1.6.14 cpe:2.3:a:openafs:openafs:1.6.14:*:*:*:*:*:*:*
openafs openafs 1.7.1 cpe:2.3:a:openafs:openafs:1.7.1:*:*:*:*:*:*:*
openafs openafs 1.7.2 cpe:2.3:a:openafs:openafs:1.7.2:*:*:*:*:*:*:*
openafs openafs 1.7.3 cpe:2.3:a:openafs:openafs:1.7.3:*:*:*:*:*:*:*
openafs openafs 1.7.4 cpe:2.3:a:openafs:openafs:1.7.4:*:*:*:*:*:*:*
openafs openafs 1.7.8 cpe:2.3:a:openafs:openafs:1.7.8:*:*:*:*:*:*:*
openafs openafs 1.7.10 cpe:2.3:a:openafs:openafs:1.7.10:*:*:*:*:*:*:*
openafs openafs 1.7.11 cpe:2.3:a:openafs:openafs:1.7.11:*:*:*:*:*:*:*
openafs openafs 1.7.12 cpe:2.3:a:openafs:openafs:1.7.12:*:*:*:*:*:*:*
openafs openafs 1.7.13 cpe:2.3:a:openafs:openafs:1.7.13:*:*:*:*:*:*:*
openafs openafs 1.7.14 cpe:2.3:a:openafs:openafs:1.7.14:*:*:*:*:*:*:*
openafs openafs 1.7.15 cpe:2.3:a:openafs:openafs:1.7.15:*:*:*:*:*:*:*
openafs openafs 1.7.16 cpe:2.3:a:openafs:openafs:1.7.16:*:*:*:*:*:*:*
openafs openafs 1.7.17 cpe:2.3:a:openafs:openafs:1.7.17:*:*:*:*:*:*:*
openafs openafs 1.7.18 cpe:2.3:a:openafs:openafs:1.7.18:*:*:*:*:*:*:*
openafs openafs 1.7.19 cpe:2.3:a:openafs:openafs:1.7.19:*:*:*:*:*:*:*
openafs openafs 1.7.20 cpe:2.3:a:openafs:openafs:1.7.20:*:*:*:*:*:*:*
openafs openafs 1.7.21 cpe:2.3:a:openafs:openafs:1.7.21:*:*:*:*:*:*:*
openafs openafs 1.7.22 cpe:2.3:a:openafs:openafs:1.7.22:*:*:*:*:*:*:*
openafs openafs 1.7.23 cpe:2.3:a:openafs:openafs:1.7.23:*:*:*:*:*:*:*
openafs openafs 1.7.24 cpe:2.3:a:openafs:openafs:1.7.24:*:*:*:*:*:*:*
openafs openafs 1.7.25 cpe:2.3:a:openafs:openafs:1.7.25:*:*:*:*:*:*:*
openafs openafs 1.7.26 cpe:2.3:a:openafs:openafs:1.7.26:*:*:*:*:*:*:*
openafs openafs 1.7.27 cpe:2.3:a:openafs:openafs:1.7.27:*:*:*:*:*:*:*
openafs openafs 1.7.28 cpe:2.3:a:openafs:openafs:1.7.28:*:*:*:*:*:*:*
openafs openafs 1.7.29 cpe:2.3:a:openafs:openafs:1.7.29:*:*:*:*:*:*:*
openafs openafs 1.7.30 cpe:2.3:a:openafs:openafs:1.7.30:*:*:*:*:*:*:*
openafs openafs 1.7.31 cpe:2.3:a:openafs:openafs:1.7.31:*:*:*:*:*:*:*

References for CVE-2015-7763

cvelogic Threat Intelligence