CVE-2016-5826
The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a...
The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (out-of-bounds heap read) by crafting a string to the icalparser_parse_string function.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (out-of-bounds heap read) by crafting a string to the icalparser_parse_string function.
- Record
CVE-2016-5826- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-125
- Updated
- 2026-11-02
CVE List No score
The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (out-of-bounds heap read) by crafting a string to the icalparser_parse_string function.
- Record
CVE-2016-5826- Updated
- 2026-11-02
EUVDEUVD-2016-6761 No score
The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (out-of-bounds heap read) by crafting a string to the icalparser_parse_string function.
- Record
EUVD-2016-6761- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fw7p-j2w6-jvv8
The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a...
The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (out-of-bounds heap read) by crafting a string to the icalparser_parse_string function.
- Record
GHSA-fw7p-j2w6-jvv8- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
OSV
The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (out-of-bounds heap read) by crafting a string to the icalparser_parse_string function.
- Record
CVE-2016-5826- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2016-5826
The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (out-of-bounds heap read) by crafting a string to the icalparser_parse_string function.
- Record
UBUNTU-CVE-2016-5826- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVSUSE-SU-2018:0119-1 No score
Recommended update for libical
This update for libical fixes the following issues:
Security issues fixed:
- CVE-2016-5823: The icalproperty_new_clone function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (use-after-free) via a crafted ics file. (bnc#986632)
- CVE-2016-5824: libical 1.0 allows remote attackers to cause a denial of service (use-after-free) via a crafted ics file. (bsc#986639)
- CVE-2016-5825: The icalparser_parse_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 ics file. (bsc#986642)
- CVE-2016-5826: The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (out-of-bounds heap read) by crafting a string to the icalparser_parse_string function. (bsc#986658)
- CVE-2016-5827: 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. (bsc#986631)
- CVE-2016-9584: libical allows remote attackers to cause a denial of service (use-after-free) and possibly read heap memory via a crafted ics file. (bnc#1015964)
Bug fixes:
- libical crashes while parsing timezones (bsc#1044995)
- Record
SUSE-SU-2018:0119-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libicalSUSE:Linux Enterprise Software Development Kit 11 SP4 |
before 0.43-1.10.6.1 | 0.43-1.10.6.1 |
libicalSUSE:Linux Enterprise Server 11 SP4 |
before 0.43-1.10.6.1 | 0.43-1.10.6.1 |
libicalSUSE:Linux Enterprise Server for SAP Applications 11 SP4 |
before 0.43-1.10.6.1 | 0.43-1.10.6.1 |
libicalUbuntu:16.04:LTS |
All versions, plus listed versions 1.0.1-0ubuntu11.0.1-0ubuntu2 |
None known |
libicalUbuntu:18.04:LTS |
All versions, plus listed versions 2.0.0-0.52.0.0-0.5build12.0.0-1ubuntu12.0.0-4 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-5826 is a high vulnerability (CVSS 7.5) in Libical Project Libical, published January 27, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.17%, the 88th percentile. Fixed in libical 0.43-1.10.6.1.
References
securityfocus.com/bid/91459
openwall.com/lists/oss-security/2016/06/25/4
bugzilla.mozilla.org/show_bug.cgi?id=1281041
nvd.nist.gov/vuln/detail/CVE-2016-5826
github.com/advisories/GHSA-fw7p-j2w6-jvv8
suse.com/support/update/announcement/2018/suse-su-20180119-1
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bugzilla.suse.com/1015964
ubuntu.com/security/CVE-2016-5826
seclists.org/oss-sec/2016/q2/604
cve.org/CVERecord?id=CVE-2016-5826