CVE-2018-7263

The mad_decoder_run() function in decoder.c in Underbit libmad through 0.15.1b allows remote attackers to cause a denial of service (SIGABRT because of double free or corruption) or possibly have unspecified other impact via a crafted file. NOTE: this may overlap CVE-2017-11552.

Published: 2018-02-20 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-7263 is rated High Risk (70.1/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 2.51%). EPSS rose +2.01% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize 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-2018-7263

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 2026-06-15 0.50% 2.51% +2.01%
2 2026-06-02 0.83% 0.50% -0.33%
3 2026-02-01 — 0.83% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-7263

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2018-7263

OS Trackers for CVE-2018-7263

vendor priority summary link
alpine critical CVE-2018-7263: 1 source package rows (libmad); 11 state rows across 9 repos (3.11-main, 3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, 3.23-community, edge-community); fixed 11, open 0. https://security.alpinelinux.org/vuln/CVE-2018-7263
redhat low — https://access.redhat.com/security/cve/CVE-2018-7263
ubuntu medium CVE-2018-7263 medium priority: Ubuntu including 2 source packages (libmad, mpg321), 39 status rows across 20 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 18, ignored 12, needs-triage 8, DNE 1. https://ubuntu.com/security/CVE-2018-7263

Affected software / configurations for CVE-2018-7263

Vendor Product Version Raw CPE
underbit libmad <= 0.15.1b cpe:2.3:a:underbit:libmad:*:*:*:*:*:*:*:*

References for CVE-2018-7263

URL Tags
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=870608 Mailing List Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1081784 Issue Tracking Third Party Advisory
cvelogic Threat Intelligence