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CVE-2020-21606

libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which...

6.5 MediumFix available

libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which can be exploited via a crafted a file.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.10%Up 0.7 points since Sep 17, 2021
90%50%10%1%

What each source reports

NVD Score used 6.5

libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which can be exploited via a crafted a file.

Record
CVE-2020-21606
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/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-787
Updated
2026-11-02
CVE List No score

libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which can be exploited via a crafted a file.

Record
CVE-2020-21606
Updated
2026-11-02
EUVDEUVD-2020-14374 No score

libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which can be exploited via a crafted a file.

Record
EUVD-2020-14374
Updated
2026-11-03
GitHub AdvisoriesGHSA-4492-fqfw-jf8g 6.5

libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which...

libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which can be exploited via a crafted a file.

Record
GHSA-4492-fqfw-jf8g
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-787
Updated
2026-11-02
OSVALPINE-CVE-2020-21606 6.5

libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which can be exploited via a crafted a file.

Record
ALPINE-CVE-2020-21606
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 6.5

libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which can be exploited via a crafted a file.

Record
CVE-2020-21606
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVDEBIAN-CVE-2020-21606 6.5

libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which can be exploited via a crafted a file.

Record
DEBIAN-CVE-2020-21606
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2020-21606 6.5

libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which can be exploited via a crafted a file.

Record
UBUNTU-CVE-2020-21606
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVMGASA-2023-0093 No score

Updated libde265 packages fix security vulnerability

libde265 has been updated to version 1.0.11 to fix many security issues.

Record
MGASA-2023-0093
Updated
2026-11-02
OSVUSN-6617-1 No score

libde265 vulnerabilities

It was discovered that libde265 could be made to write out of bounds. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2020-21594)

It was discovered that libde265 could be made to write out of bounds. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2020-21595, CVE-2020-21596, CVE-2020-21599, CVE-2020-21600, CVE-2020-21601, CVE-2020-21602, CVE-2020-21603, CVE-2020-21604, CVE-2020-21605)

It was discovered that libde265 did not properly manage memory. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-21597, CVE-2020-21598, CVE-2020-21606, CVE-2021-36408)

Record
USN-6617-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libde265
Alpine:v3.14
 before 1.0.11-r0
1.0.11-r0
libde265
Alpine:v3.15
 before 1.0.11-r0
1.0.11-r0
libde265
Alpine:v3.16
 before 1.0.11-r0
1.0.11-r0
libde265
Alpine:v3.17
 before 1.0.11-r0
1.0.11-r0
libde265
Alpine:v3.18
 before 1.0.11-r0
1.0.11-r0
libde265
Alpine:v3.19
 before 1.0.11-r0
1.0.11-r0
libde265
Alpine:v3.20
 before 1.0.11-r0
1.0.11-r0
libde265
Alpine:v3.21
 before 1.0.11-r0
1.0.11-r0
libde265
Alpine:v3.22
 before 1.0.11-r0
1.0.11-r0
libde265
Alpine:v3.23
 before 1.0.11-r0
1.0.11-r0
Show 12 moreShow less
Affected packages
PackageAffectedFixed
libde265
Alpine:v3.24
 before 1.0.11-r0
1.0.11-r0
libde265
Debian:12
 before 1.0.9-1
1.0.9-1
libde265
Debian:13
 before 1.0.9-1
1.0.9-1
libde265
Debian:14
 before 1.0.9-1
1.0.9-1
libde265
Debian:10
From an advisory covering 16 CVEs
 before 1.0.3-1+deb10u1, plus listed versions
1.0.3-1
1.0.3-1+deb10u1
libde265
Debian:11
From an advisory covering 46 CVEs
 before 1.0.11-0+deb11u1, plus listed versions
1.0.8-11.0.8-1.11.0.9-11.0.9-1.1
1.0.11-0+deb11u1
libde265
Mageia:8
From an advisory covering 46 CVEs
 before 1.0.11-1.mga8
1.0.11-1.mga8
libde265
Mageia:8
From an advisory covering 46 CVEs
 before 1.0.11-1.mga8.tainted
1.0.11-1.mga8.tainted
libde265
Ubuntu:20.04:LTS
 before 1.0.4-1ubuntu0.1, plus listed versions
1.0.3-1build11.0.4-11.0.4-1build1
1.0.4-1ubuntu0.1
libde265
Ubuntu:Pro:16.04:LTS
From an advisory covering 14 CVEs
 before 1.0.2-2ubuntu0.16.04.1~esm1, plus listed versions
1.0.2-1build11.0.2-2
1.0.2-2ubuntu0.16.04.1~esm1
libde265
Ubuntu:Pro:18.04:LTS
From an advisory covering 14 CVEs
 before 1.0.2-2ubuntu0.18.04.1~esm1, plus listed versions
1.0.2-2build1
1.0.2-2ubuntu0.18.04.1~esm1
libde265
Ubuntu:20.04:LTS
From an advisory covering 14 CVEs
 before 1.0.4-1ubuntu0.1, plus listed versions
1.0.3-1build11.0.4-11.0.4-1build1
1.0.4-1ubuntu0.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2020-21606 is a medium vulnerability (CVSS 6.5) in Struktur Libde265, published September 16, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.10%, the 65th percentile. Fixed in libde265 1.0.11-r0.

References

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