CVE-2020-27823: debian debian_linux Improper Input Validation
Vulnerability summary
CVE-2020-27823 is a high (CVSS 7.8) Improper Input Validation vulnerability in debian debian_linux. EPSS estimates a 1.11% chance of exploitation in the next 30 days, higher than 65.8% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 10 · Related 6Timeline
- 13-05-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A flaw was found in OpenJPEG’s encoder. This flaw allows an attacker to pass specially crafted x,y offset input to OpenJPEG to use during encoding. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.11%
Chance of exploitation in the next 30 days
Percentile
66%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.11% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-120Buffer Copy without Checking Size of InputThe product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu5 products
- blenderAll versions (No fix recorded)
- insighttoolkit4All versions (No fix recorded)
- openjpeg2< 2.1.2-1.1+deb9u6build0.16.04.1 | < 2.3.0-2+deb10u2build0.18.04.1 | < 2.3.1-1ubuntu4.20.04.1 | < 2.3.1-1ubuntu5
- qtwebengine-opensource-srcAll versions (No fix recorded)
- texmakerAll versions (No fix recorded)
Debian2 products
- openjpeg2< 2.4.0-1
- debian_linuxEOL9.0 | 10.0
Alpine1 product
- openjpeg< 2.3.1-r5 | < 2.3.1-r6
Fedoraproject1 product
- fedoraEOL32 | 33
Uclouvain1 product
- openjpeg< 2.4.0
5 vendors · 10 products
References
13 links
lists.debian.org/debian-lts-announce/2021/02/msg00011.htmlMailing ListX Refsource MLISTThird Party Advisory
