Description
The icaltime_from_string function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (out-of-bounds heap read) via a crafted string to the icalparser_parse_string function.
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libical | No fix yet | — |
| Ubuntu 16.04 LTS | libical | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | libical | 1.0.1-16.3.1 | SUSE-SU-2017:1989-1 |
| SLES 12 SP2 | libical | 1.0.1-16.3.1 | SUSE-SU-2017:1989-1 |
| SLES 11 SP4 | libical | 0.43-1.10.6.1 | SUSE-SU-2018:0119-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | libical | 1.0.1-16.3.1 | SUSE-SU-2017:1989-1 |
| SLES for SAP 12 SP2 | libical | 1.0.1-16.3.1 | SUSE-SU-2017:1989-1 |
| SLES for SAP 11 SP4 | libical | 0.43-1.10.6.1 | SUSE-SU-2018:0119-1 |
Advisories 2
- SUSE-SU-2017:1989-1 Security update for libical SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0119-1 Recommended update for libical SUSE / openSUSE Security Updates · Feb 4, 2026