Description
In ncurses 6.0, there is an attempted 0xffffffffffffffff access in the append_acs function of tinfo/parse_entry.c. It could lead to a remote denial of service attack if the terminfo library code is used to process untrusted terminfo data.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ncurses | 6.0+20170701-1 | — |
| Debian 13 | ncurses | 6.0+20170701-1 | — |
| Debian 12 | ncurses | 6.0+20170701-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | ncurses | 6.0+20160213-1ubuntu1+esm1 | USN-5448-1 |
| Ubuntu Pro 14.04 LTS | ncurses | 5.9+20140118-1ubuntu1+esm1 | USN-5448-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | ncurses | 5.9-50.1 | SUSE-SU-2017:2075-1 |
| SLES 12 SP2 | ncurses | 5.9-50.1 | SUSE-SU-2017:2075-1 |
| SLES 11 SP4 | ncurses | 5.6-93.6.1 | SUSE-SU-2017:2076-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | ncurses | 5.9-50.1 | SUSE-SU-2017:2075-1 |
| SLES for SAP 12 SP2 | ncurses | 5.9-50.1 | SUSE-SU-2017:2075-1 |
| SLES for SAP 11 SP4 | ncurses | 5.6-93.6.1 | SUSE-SU-2017:2076-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.6 | ncurses | 6.0_p20170930-r0 | — |
| Alpine v3.5 | ncurses | 6.0_p20170701-r0 | — |
| Alpine v3.4 | ncurses | 6.0_p20170701-r0 | — |
| Alpine v3.3 | ncurses | 6.0_p20170701-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | ncurses +7 | 6.0-8.20170212.amzn2.1.3 | ALAS2-2019-1302 |
Advisories 4
- USN-5448-1 ncurses vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- SUSE-SU-2017:2075-1 Security update for ncurses SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2076-1 Security update for ncurses SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2019-1302 Moderate: ncurses security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 2, 2019
References
- GLSA-201804-13 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1464686