CVE-2020-27618: debian debian_linux Loop with Unreachable Exit Condition
Vulnerability summary
CVE-2020-27618 is a medium (CVSS 5.5) Loop with Unreachable Exit Condition vulnerability in debian debian_linux. EPSS estimates a 0.94% chance of exploitation in the next 30 days, higher than 60.9% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 11 · Related 8Timeline
- 26-02-2021PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
Description
The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid multi-byte input sequences in IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 encodings, fails to advance the input state, which could lead to an infinite loop in applications, resulting in a denial of service, a different vulnerability from CVE-2016-10228.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.94%
Chance of exploitation in the next 30 days
Percentile
61%
Versus all other CVEs
30-day change
Increase +0.05 pp
From 0.89% 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
1 foundExploit Reference (sourceware.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- glibc< 2.31-5
- debian_linuxEOL10.0
Ubuntu2 products
- eglibcAll versions (No fix recorded)
- glibc< 2.23-0ubuntu11.3+esm3 | < 2.27-3ubuntu1.5 | < 2.31-0ubuntu9.7
Gnu1 product
- glibc≤ 2.32
Oracle1 product
5 vendors · 17 products
References
15 links- security.netapp.com/advisory/ntap-20210401-0006/Third Party Advisory
