CVE catalog
CVE-2021-39537
ncurses: CVE-2021-39537
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.22% · Oct 25, 2026
An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | ncurses | sid | 6.6+20260608-2 | fixed |
| Debian | ncurses | forky | 6.6+20260608-2 | fixed |
| Debian | ncurses | trixie | 6.5+20250216-2 | fixed |
| Debian | ncurses | bookworm | 6.4-4 | fixed |
| Cpe | ncurses | Not reported | Not reported | unknown |
| Cpe | mac_os_x | Not reported | Not reported | unknown |
| Cpe | macos | Not reported | Not reported | unknown |
| Alpine | ncurses | 3.12 | 6.2_p20200523-r1 | fixed |
| Alpine | ncurses | 3.13 | 6.2_p20200530-r0 | fixed |
| Alpine | ncurses | 3.14 | 6.2_p20200530-r0 | fixed |
| Alpine | ncurses | 3.15 | 6.2_p20200530-r0 | fixed |
| Alpine | ncurses | 3.16 | 6.2_p20200530-r0 | fixed |
| Alpine | ncurses | 3.17 | 6.2_p20200530-r0 | fixed |
| Alpine | ncurses | 3.18 | 6.2_p20200530-r0 | fixed |
| Alpine | ncurses | 3.19 | 6.2_p20200530-r0 | fixed |
| Alpine | ncurses | 3.20 | 6.2_p20200530-r0 | fixed |
| Alpine | ncurses | 3.21 | 6.2_p20200530-r0 | fixed |
| Alpine | ncurses | 3.22 | 6.2_p20200530-r0 | fixed |
| Alpine | ncurses | 3.23 | 6.2_p20200530-r0 | fixed |
| Alpine | ncurses | 3.24 | 6.2_p20200530-r0 | fixed |
| Ubuntu | ncurses | pro | 5.9+20150516-2ubuntu1 | vulnerable |
| Ubuntu | ncurses | pro | 6.0+20151024-2ubuntu1 | vulnerable |
| Ubuntu | ncurses | pro | 6.0+20151024-2ubuntu2 | vulnerable |
| Ubuntu | ncurses | pro | 6.0+20160213-1ubuntu1 | vulnerable |
| Ubuntu | ncurses | pro | 6.0+20160213-1ubuntu1+esm1 | vulnerable |
| Ubuntu | ncurses | pro | 6.0+20160213-1ubuntu1+esm2 | fixed |
| Ubuntu | ncurses | 18.04 | 6.0+20160625-1ubuntu1 | vulnerable |
| Ubuntu | ncurses | 18.04 | 6.0+20171125-1ubuntu1 | vulnerable |
| Ubuntu | ncurses | 18.04 | 6.1-1ubuntu1 | vulnerable |
| Ubuntu | ncurses | 18.04 | 6.1-1ubuntu1.18.04 | vulnerable |
| Ubuntu | ncurses | 18.04 | 6.1-1ubuntu1.18.04.1 | fixed |
| Ubuntu | ncurses | 20.04 | 6.1+20190803-1ubuntu1 | vulnerable |
| Ubuntu | ncurses | 20.04 | 6.1+20191019-1ubuntu1 | vulnerable |
| Ubuntu | ncurses | 20.04 | 6.2-0ubuntu2 | vulnerable |
| Ubuntu | ncurses | 20.04 | 6.2-0ubuntu2.1 | fixed |
| Suse | ncurses | linux enterprise software development kit 12 sp5 | 5.9-75.1 | fixed |
| Suse | ncurses | linux enterprise server 12 sp5 | 5.9-75.1 | fixed |
| Suse | ncurses | linux enterprise server for sap applications 12 sp5 | 5.9-75.1 | fixed |
| Suse | ncurses | linux enterprise module for basesystem 15 sp2 | 6.1-5.9.1 | fixed |
| Suse | ncurses | linux enterprise module for basesystem 15 sp3 | 6.1-5.9.1 | fixed |
| Suse | ncurses | linux enterprise module for development tools 15 sp2 | 6.1-5.9.1 | fixed |
| Suse | ncurses | linux enterprise module for development tools 15 sp3 | 6.1-5.9.1 | fixed |
| Suse | ncurses | linux enterprise module for legacy 15 sp2 | 6.1-5.9.1 | fixed |
| Suse | ncurses | linux enterprise module for legacy 15 sp3 | 6.1-5.9.1 | fixed |
| Suse | ncurses | linux enterprise micro 5.0 | 6.1-5.9.1 | fixed |
| Suse | ncurses | linux enterprise micro 5.1 | 6.1-5.9.1 | fixed |
| Opensuse | ncurses | leap 15.3 | 6.1-5.9.1 | fixed |
| Opensuse | ncurses | leap 15.2 | 6.1-lp152.8.3.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | ncurses | source | sid | 6.2+20200912-1 | unimportant | Not reported | Not reported |
| Debian | ncurses | source | forky | 6.2+20200912-1 | unimportant | Not reported | Not reported |
| Debian | ncurses | source | trixie | 6.2+20200912-1 | unimportant | Not reported | Not reported |
| Debian | ncurses | source | bookworm | 6.2+20200912-1 | unimportant | Not reported | Not reported |
| Alpine | ncurses | apk | 3.12 | 6.2_p20200523-r1 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.13 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.14 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.15 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.16 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.17 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.18 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.19 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.20 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.21 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.22 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.23 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Alpine | ncurses | apk | 3.24 | 6.2_p20200530-r0 | Not reported | ALPINE-CVE-2021-39537 | Not reported |
| Ubuntu | ncurses | deb | pro | 6.0+20160213-1ubuntu1+esm2 | Not reported | UBUNTU-CVE-2021-39537 | Not reported |
| Ubuntu | ncurses | deb | 18.04 | 6.1-1ubuntu1.18.04.1 | Not reported | UBUNTU-CVE-2021-39537 | Not reported |
| Ubuntu | ncurses | deb | 20.04 | 6.2-0ubuntu2.1 | Not reported | UBUNTU-CVE-2021-39537 | Not reported |
| Suse | ncurses | rpm | linux enterprise software development kit 12 sp5 | 5.9-75.1 | Not reported | SUSE-SU-2021:3491-1 | Not reported |
| Suse | ncurses | rpm | linux enterprise server 12 sp5 | 5.9-75.1 | Not reported | SUSE-SU-2021:3491-1 | Not reported |
| Suse | ncurses | rpm | linux enterprise server for sap applications 12 sp5 | 5.9-75.1 | Not reported | SUSE-SU-2021:3491-1 | Not reported |
| Suse | ncurses | rpm | linux enterprise module for basesystem 15 sp2 | 6.1-5.9.1 | Not reported | SUSE-SU-2021:3490-1 | Not reported |
| Suse | ncurses | rpm | linux enterprise module for basesystem 15 sp3 | 6.1-5.9.1 | Not reported | SUSE-SU-2021:3490-1 | Not reported |
| Suse | ncurses | rpm | linux enterprise module for development tools 15 sp2 | 6.1-5.9.1 | Not reported | SUSE-SU-2021:3490-1 | Not reported |
| Suse | ncurses | rpm | linux enterprise module for development tools 15 sp3 | 6.1-5.9.1 | Not reported | SUSE-SU-2021:3490-1 | Not reported |
| Suse | ncurses | rpm | linux enterprise module for legacy 15 sp2 | 6.1-5.9.1 | Not reported | SUSE-SU-2021:3490-1 | Not reported |
| Suse | ncurses | rpm | linux enterprise module for legacy 15 sp3 | 6.1-5.9.1 | Not reported | SUSE-SU-2021:3490-1 | Not reported |
| Suse | ncurses | rpm | linux enterprise micro 5.0 | 6.1-5.9.1 | Not reported | SUSE-SU-2021:3490-1 | Not reported |
| Suse | ncurses | rpm | linux enterprise micro 5.1 | 6.1-5.9.1 | Not reported | SUSE-SU-2021:3490-1 | Not reported |
| Opensuse | ncurses | rpm | leap 15.3 | 6.1-5.9.1 | Not reported | OPENSUSE-SU-2021:3490-1 | Not reported |
| Opensuse | ncurses | rpm | leap 15.2 | 6.1-lp152.8.3.1 | Not reported | OPENSUSE-SU-2021:1417-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [lib32ncurses6]Fixed
Source package: [ncurses]
Details (1)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [lib32ncurses-dev]Fixed
Source package: [ncurses]
Details (1)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [lib32ncursesw6]Fixed
Source package: [ncurses]
Details (1)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [lib32tinfo6]Fixed
Source package: [ncurses]
Details (1)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [libncurses5]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [libncurses5-dev]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [libncurses6]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [libncurses-dev]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [libncursesw5]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [libncursesw5-dev]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [libncursesw6]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [libtinfo5]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [libtinfo6]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [libtinfo-dev]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [ncurses-base]Fixed
Source package: [ncurses]
Details (2)
6.4-4· all · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· all · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [ncurses-bin]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [ncurses-doc]Fixed
Source package: [ncurses]
Details (2)
6.4-4· all · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· all · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [ncurses-examples]Fixed
Source package: [ncurses]
Details (2)
6.4-4· amd64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· arm64 · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
- [ncurses-term]Fixed
Source package: [ncurses]
Details (2)
6.4-4· all · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
6.4-4· all · bookwormFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · bookworm; dsa · ncurses · debian · 12
[Debian 13 (Trixie)]
- [lib32ncurses6]Fixed
Source package: [ncurses]
Details (1)
6.5+20250216-2· amd64 · trixieFixed · Fixed:
6.2+20200912-1dsa · ncurses · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2021_3490-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2021-39537]
- [https://osv.dev/vulnerability/ALPINE-CVE-2021-39537]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-39537]
- [https://osv.dev/vulnerability/DLA-3682-1]
- [https://osv.dev/vulnerability/SUSE-SU-2021:3490-1]
- [https://osv.dev/vulnerability/SUSE-SU-2021:3491-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-39537]
- [https://osv.dev/vulnerability/openSUSE-SU-2021:1417-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2021:3490-1]
- [https://security-tracker.debian.org/tracker/CVE-2021-39537]
- [https://wid.cert-bund.de/.well-known/csaf/white/2022/wid-sec-w-2022-1846.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]