CVE-2021-42917

Buffer overflow vulnerability in Kodi xbmc up to 19.0, allows attackers to cause a denial of...

5.5 MediumFix available

Buffer overflow vulnerability in Kodi xbmc up to 19.0, allows attackers to cause a denial of service due to improper length of values passed to istream.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.90%Up 0.6 points since Nov 2, 2021

What each source reports

NVD Score used 5.5

Buffer overflow vulnerability in Kodi xbmc up to 19.0, allows attackers to cause a denial of service due to improper length of values passed to istream.

Record: CVE-2021-42917
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-120
Updated: 2026-11-02

CVE List No score

Buffer overflow vulnerability in Kodi xbmc up to 19.0, allows attackers to cause a denial of service due to improper length of values passed to istream.

Record: CVE-2021-42917
Updated: 2026-11-02

EUVDEUVD-2021-29872 No score

Buffer overflow vulnerability in Kodi xbmc up to 19.0, allows attackers to cause a denial of service due to improper length of values passed to istream.

Record: EUVD-2021-29872
Updated: 2026-11-03

GitHub AdvisoriesGHSA-9856-v5xm-mr4c 5.5

Buffer overflow vulnerability in Kodi xbmc up to 19.0, allows attackers to cause a denial of...

Buffer overflow vulnerability in Kodi xbmc up to 19.0, allows attackers to cause a denial of service due to improper length of values passed to istream.

Record: GHSA-9856-v5xm-mr4c
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-120
Updated: 2026-11-02

OSV 5.5

Buffer overflow vulnerability in Kodi xbmc up to 19.0, allows attackers to cause a denial of service due to improper length of values passed to istream.

Record: CVE-2021-42917
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2021-42917 5.5

Buffer overflow vulnerability in Kodi xbmc up to 19.0, allows attackers to cause a denial of service due to improper length of values passed to istream.

Record: DEBIAN-CVE-2021-42917
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-42917 5.5

Buffer overflow vulnerability in Kodi xbmc up to 19.0, allows attackers to cause a denial of service due to improper length of values passed to istream.

Record: UBUNTU-CVE-2021-42917
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

kodi

Affected packages

Affected packages
Package	Affected	Fixed
`kodi` Debian:12	before 2:19.3+dfsg1-1	2:19.3+dfsg1-1
`kodi` Debian:13	before 2:19.3+dfsg1-1	2:19.3+dfsg1-1
`kodi` Debian:14	before 2:19.3+dfsg1-1	2:19.3+dfsg1-1
`kodi` Debian:10 From an advisory covering 4 CVEs	before 2:17.6+dfsg1-4+deb10u1, plus listed versions 2:17.6+dfsg1-4	2:17.6+dfsg1-4+deb10u1
`kodi` Ubuntu:16.04:LTS	All versions, plus listed versions 15.1+dfsg1-315.2+dfsg1-1build115.2+dfsg1-315.2+dfsg1-3ubuntu115.2+dfsg1-3ubuntu1.1	None known
`kodi` Ubuntu:18.04:LTS	All versions, plus listed versions 2:17.3+dfsg1-32:17.3+dfsg1-3build12:17.3+dfsg1-52:17.3+dfsg1-5build12:17.3+dfsg1-5build22:17.6+dfsg1-12:17.6+dfsg1-1build12:17.6+dfsg1-1ubuntu1	None known
`kodi` Ubuntu:20.04:LTS	All versions, plus listed versions 2:17.6+dfsg1-4ubuntu42:17.6+dfsg1-4ubuntu92:17.6+dfsg1-4ubuntu102:18.5+dfsg1-0ubuntu32:18.6+dfsg1-2ubuntu1	None known
`kodi` Ubuntu:22.04:LTS	All versions, plus listed versions 2:19.1+dfsg2-22:19.3+dfsg1-12:19.3+dfsg1-1build22:19.3+dfsg1-1build32:19.3+dfsg1-1build42:19.3+dfsg1-1build52:19.4+dfsg1-2	None known
`kodi` Ubuntu:24.04:LTS	All versions, plus listed versions 2:20.2+dfsg-42:20.2+dfsg-4build12:20.2+dfsg-4build22:20.2+dfsg-4ubuntu12:20.3+dfsg-12:20.4+dfsg-12:20.5+dfsg-1build22:20.5+dfsg-1ubuntu1	None known
`kodi` Ubuntu:25.10	All versions, plus listed versions 2:21.2+dfsg-1build22:21.2+dfsg-42:21.2+dfsg-4build12:21.2+dfsg-4build2	None known
`kodi` Ubuntu:26.10	All versions, plus listed versions 2:21.3+dfsg-1ubuntu12:21.3+dfsg-1.2	None known
`kodi` Ubuntu:26.04:LTS	All versions, plus listed versions 2:21.2+dfsg-4build22:21.2+dfsg-4build32:21.2+dfsg-52:21.3+dfsg-12:21.3+dfsg-1build12:21.3+dfsg-1ubuntu1	None known

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-42917 is a medium vulnerability (CVSS 5.5) in Kodi, published November 1, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.90%, the 79th percentile. Fixed in kodi 2:19.3+dfsg1-1.

References

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