CVE catalog
CVE-2021-26937
screen: CVE-2021-26937
- Severity
- Critical · CVSS 9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 9.15% · Oct 25, 2026
encoding.c in GNU Screen through 4.8.0 allows remote attackers to cause a denial of service (invalid write access and application crash) or possibly have unspecified other impact via a crafted UTF-8 character sequence.
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 | screen | sid | 5.0.2-1 | fixed |
| Debian | screen | forky | 5.0.2-1 | fixed |
| Debian | screen | trixie | 4.9.1-3 | fixed |
| Debian | screen | bookworm | 4.9.0-4 | fixed |
| Alpine | screen | 3.10 | 4.6.2-r2 | fixed |
| Alpine | screen | 3.11 | 4.7.0-r2 | fixed |
| Alpine | screen | 3.12 | 4.8.0-r1 | fixed |
| Alpine | screen | 3.13 | 4.8.0-r4 | fixed |
| Alpine | screen | 3.14 | 4.8.0-r4 | fixed |
| Alpine | screen | 3.15 | 4.8.0-r4 | fixed |
| Alpine | screen | 3.16 | 4.8.0-r4 | fixed |
| Alpine | screen | 3.17 | 4.8.0-r4 | fixed |
| Alpine | screen | 3.18 | 4.8.0-r4 | fixed |
| Alpine | screen | 3.19 | 4.8.0-r4 | fixed |
| Alpine | screen | 3.20 | 4.8.0-r4 | fixed |
| Alpine | screen | 3.21 | 4.8.0-r4 | fixed |
| Alpine | screen | 3.22 | 4.8.0-r4 | fixed |
| Alpine | screen | 3.23 | 4.8.0-r4 | fixed |
| Alpine | screen | 3.24 | 4.8.0-r4 | fixed |
| Ubuntu | screen | 16.04 | 4.3.1-2 | vulnerable |
| Ubuntu | screen | 16.04 | 4.3.1-2build1 | vulnerable |
| Ubuntu | screen | 16.04 | 4.3.1-2ubuntu0.1 | fixed |
| Ubuntu | screen | 18.04 | 4.6.1-1 | vulnerable |
| Ubuntu | screen | 18.04 | 4.6.2-1 | vulnerable |
| Ubuntu | screen | 18.04 | 4.6.2-1ubuntu1 | vulnerable |
| Ubuntu | screen | 18.04 | 4.6.2-1ubuntu1.1 | fixed |
| Ubuntu | screen | 20.04 | 4.6.2-3build1 | vulnerable |
| Ubuntu | screen | 20.04 | 4.7.0-1 | vulnerable |
| Ubuntu | screen | 20.04 | 4.8.0-1 | vulnerable |
| Ubuntu | screen | 20.04 | 4.8.0-1ubuntu0.1 | fixed |
| Ubuntu | screen | pro | 4.0.3-14ubuntu10 | vulnerable |
| Ubuntu | screen | pro | 4.1.0~20120320gitdb59704-9 | vulnerable |
| Ubuntu | screen | pro | 4.1.0~20120320gitdb59704-9ubuntu0.1~esm1 | vulnerable |
| Ubuntu | screen | pro | 4.1.0~20120320gitdb59704-9ubuntu0.1~esm2 | fixed |
| Suse | screen | hpe helion openstack 8 | 4.0.4-23.6.1 | fixed |
| Suse | screen | openstack cloud 7 | 4.0.4-23.6.1 | fixed |
| Suse | screen | openstack cloud 8 | 4.0.4-23.6.1 | fixed |
| Suse | screen | openstack cloud 9 | 4.0.4-23.6.1 | fixed |
| Suse | screen | openstack cloud crowbar 8 | 4.0.4-23.6.1 | fixed |
| Suse | screen | openstack cloud crowbar 9 | 4.0.4-23.6.1 | fixed |
| Suse | screen | linux enterprise server for sap applications 12 sp2 | 4.0.4-23.6.1 | fixed |
| Suse | screen | linux enterprise server for sap applications 12 sp3 | 4.0.4-23.6.1 | fixed |
| Suse | screen | linux enterprise server for sap applications 12 sp4 | 4.0.4-23.6.1 | fixed |
| Suse | screen | linux enterprise server 12 sp2-ltss | 4.0.4-23.6.1 | fixed |
| Suse | screen | linux enterprise server 12 sp2-bcl | 4.0.4-23.6.1 | fixed |
| Suse | screen | linux enterprise server 12 sp3-ltss | 4.0.4-23.6.1 | fixed |
| Suse | screen | linux enterprise server 12 sp3-bcl | 4.0.4-23.6.1 | fixed |
| Suse | screen | linux enterprise server 12 sp4-ltss | 4.0.4-23.6.1 | fixed |
| Suse | screen | linux enterprise server 12 sp5 | 4.0.4-23.6.1 | fixed |
| Suse | screen | linux enterprise server for sap applications 12 sp5 | 4.0.4-23.6.1 | fixed |
| Opensuse | screen | leap 15.2 | 4.6.2-lp152.6.3.1 | fixed |
| Ubuntu | screen | pro | 4.0.3-14ubuntu10 | vulnerable |
| Ubuntu | screen | pro | 4.1.0~20120320gitdb59704-9 | vulnerable |
| Ubuntu | screen | pro | 4.1.0~20120320gitdb59704-9ubuntu0.1~esm1 | vulnerable |
| Ubuntu | screen | pro | 4.1.0~20120320gitdb59704-9ubuntu0.1~esm2 | fixed |
| Ubuntu | screen | 16.04 | 4.3.1-2 | vulnerable |
| Ubuntu | screen | 16.04 | 4.3.1-2build1 | vulnerable |
| Ubuntu | screen | 16.04 | 4.3.1-2ubuntu0.1 | fixed |
| Ubuntu | screen | 18.04 | 4.6.1-1 | vulnerable |
| Ubuntu | screen | 18.04 | 4.6.2-1 | vulnerable |
| Ubuntu | screen | 18.04 | 4.6.2-1ubuntu1 | vulnerable |
| Ubuntu | screen | 18.04 | 4.6.2-1ubuntu1.1 | fixed |
| Ubuntu | screen | 20.04 | 4.6.2-3build1 | vulnerable |
| Ubuntu | screen | 20.04 | 4.7.0-1 | vulnerable |
| Ubuntu | screen | 20.04 | 4.8.0-1 | vulnerable |
| Ubuntu | screen | 20.04 | 4.8.0-1ubuntu0.1 | fixed |
| Opensuse | screen | tumbleweed | 4.9.0-1.1 | fixed |
| Suse | screen | linux enterprise module for basesystem 15 sp2 | 4.6.2-5.3.1 | fixed |
| Suse | screen | linux enterprise high performance computing 15-espos | 4.6.2-5.3.1 | fixed |
| Suse | screen | linux enterprise high performance computing 15-ltss | 4.6.2-5.3.1 | fixed |
| Suse | screen | linux enterprise high performance computing 15 sp1-espos | 4.6.2-5.3.1 | fixed |
| Suse | screen | linux enterprise high performance computing 15 sp1-ltss | 4.6.2-5.3.1 | fixed |
| Suse | screen | linux enterprise server 15-ltss | 4.6.2-5.3.1 | fixed |
| Suse | screen | linux enterprise server 15 sp1-bcl | 4.6.2-5.3.1 | fixed |
| Suse | screen | linux enterprise server 15 sp1-ltss | 4.6.2-5.3.1 | fixed |
| Suse | screen | linux enterprise server for sap applications 15 | 4.6.2-5.3.1 | fixed |
| Suse | screen | linux enterprise server for sap applications 15 sp1 | 4.6.2-5.3.1 | fixed |
| Suse | screen | manager proxy 4.0 | 4.6.2-5.3.1 | fixed |
| Suse | screen | manager retail branch server 4.0 | 4.6.2-5.3.1 | fixed |
| Suse | screen | manager server 4.0 | 4.6.2-5.3.1 | fixed |
| Suse | screen | enterprise storage 6 | 4.6.2-5.3.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | screen | source | sid | 4.8.0-5 | not yet assigned | Not reported | [982435] |
| Debian | screen | source | forky | 4.8.0-5 | not yet assigned | Not reported | [982435] |
| Debian | screen | source | trixie | 4.8.0-5 | not yet assigned | Not reported | [982435] |
| Debian | screen | source | bookworm | 4.8.0-5 | not yet assigned | Not reported | [982435] |
| Alpine | screen | apk | 3.10 | 4.6.2-r2 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.11 | 4.7.0-r2 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.12 | 4.8.0-r1 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.13 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.14 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.15 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.16 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.17 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.18 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.19 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.20 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.21 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.22 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.23 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Alpine | screen | apk | 3.24 | 4.8.0-r4 | Not reported | ALPINE-CVE-2021-26937 | Not reported |
| Ubuntu | screen | deb | 16.04 | 4.3.1-2ubuntu0.1 | Not reported | USN-4747-1 | Not reported |
| Ubuntu | screen | deb | 18.04 | 4.6.2-1ubuntu1.1 | Not reported | USN-4747-1 | Not reported |
| Ubuntu | screen | deb | 20.04 | 4.8.0-1ubuntu0.1 | Not reported | USN-4747-1 | Not reported |
| Ubuntu | screen | deb | pro | 4.1.0~20120320gitdb59704-9ubuntu0.1~esm2 | Not reported | USN-4747-2 | Not reported |
| Suse | screen | rpm | hpe helion openstack 8 | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | openstack cloud 7 | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | openstack cloud 8 | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | openstack cloud 9 | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | openstack cloud crowbar 8 | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | openstack cloud crowbar 9 | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | linux enterprise server for sap applications 12 sp2 | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | linux enterprise server for sap applications 12 sp3 | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | linux enterprise server for sap applications 12 sp4 | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | linux enterprise server 12 sp2-ltss | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | linux enterprise server 12 sp2-bcl | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | linux enterprise server 12 sp3-ltss | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | linux enterprise server 12 sp3-bcl | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | linux enterprise server 12 sp4-ltss | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | linux enterprise server 12 sp5 | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Suse | screen | rpm | linux enterprise server for sap applications 12 sp5 | 4.0.4-23.6.1 | Not reported | SUSE-SU-2021:0491-1 | Not reported |
| Opensuse | screen | rpm | leap 15.2 | 4.6.2-lp152.6.3.1 | Not reported | OPENSUSE-SU-2021:0304-1 | Not reported |
| Ubuntu | screen | deb | pro | 4.1.0~20120320gitdb59704-9ubuntu0.1~esm2 | Not reported | UBUNTU-CVE-2021-26937 | Not reported |
| Ubuntu | screen | deb | 16.04 | 4.3.1-2ubuntu0.1 | Not reported | UBUNTU-CVE-2021-26937 | Not reported |
| Ubuntu | screen | deb | 18.04 | 4.6.2-1ubuntu1.1 | Not reported | UBUNTU-CVE-2021-26937 | Not reported |
| Ubuntu | screen | deb | 20.04 | 4.8.0-1ubuntu0.1 | Not reported | UBUNTU-CVE-2021-26937 | Not reported |
| Opensuse | screen | rpm | tumbleweed | 4.9.0-1.1 | Not reported | OPENSUSE-SU-2024:11884-1 | Not reported |
| Suse | screen | rpm | linux enterprise module for basesystem 15 sp2 | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | linux enterprise high performance computing 15-espos | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | linux enterprise high performance computing 15-ltss | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | linux enterprise high performance computing 15 sp1-espos | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | linux enterprise high performance computing 15 sp1-ltss | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | linux enterprise server 15-ltss | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | linux enterprise server 15 sp1-bcl | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | linux enterprise server 15 sp1-ltss | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | linux enterprise server for sap applications 15 | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | linux enterprise server for sap applications 15 sp1 | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | manager proxy 4.0 | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | manager retail branch server 4.0 | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | manager server 4.0 | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
| Suse | screen | rpm | enterprise storage 6 | 4.6.2-5.3.1 | Not reported | SUSE-SU-2021:0492-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [screen]Fixed
Details (2)
4.9.0-4· amd64 · bookwormFixed · Fixed:
4.8.0-5dsa · screen · debian · bookworm; dsa · screen · debian · 12
4.9.0-4· arm64 · bookwormFixed · Fixed:
4.8.0-5dsa · screen · debian · bookworm; dsa · screen · debian · 12
[Debian 13 (Trixie)]
- [screen]Fixed
Details (2)
4.9.1-3· amd64 · trixieFixed · Fixed:
4.8.0-5dsa · screen · debian · 13
4.9.1-3· arm64 · trixieFixed · Fixed:
4.8.0-5dsa · screen · debian · 13
[openSUSE Tumbleweed]
Observed:
References
- [https://access.redhat.com/errata/RHSA-2022:1074]
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2021_0742.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2021-26937]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-26937]
- [https://osv.dev/vulnerability/DLA-2570-1]
- [https://osv.dev/vulnerability/DSA-4861-1]
- [https://osv.dev/vulnerability/SUSE-SU-2021:0491-1]
- [https://osv.dev/vulnerability/SUSE-SU-2021:0492-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-26937]
- [https://osv.dev/vulnerability/USN-4747-1]
- [https://osv.dev/vulnerability/USN-4747-2]
- [https://osv.dev/vulnerability/openSUSE-SU-2021:0304-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2024:11884-1]
- [https://security-tracker.debian.org/tracker/CVE-2021-26937]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]