CVE-2026-111269
Published: October 17, 2026Last modified: October 20, 2026
Description
libical through 4.0.6 contains a heap-based out-of-bounds read in icalvalue_decode_ical_string() in src/libical/icalvalue.c when decoding input ending in a backslash. Attackers can supply escaped iCalendar text with a trailing backslash, causing the loop to read past the terminator and crash the application or leak adjacent heap memory.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.1 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | REQUIRED |
| Scope | UNCHANGED |
| Confidentiality | LOW |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | libical | Vulnerable (3.0.16-r1) |
| 25 LTS | libical | Vulnerable (3.0.20-r0) | |
| Stream | libical | Vulnerable (3.0.14-r0) |
References
- https://github.com/libical/libical
- https://github.com/libical/libical/blob/9cfca65c122fa23b9680a28e0c9225a2fd015fc5/src/libical/icalvalue.c#L1608-L1645
- https://github.com/libical/libical/commit/d753885ce2de7c105d6b8c405aa7aee1d98ad8de
- https://github.com/libical/libical/pull/1455
- https://hackmd.io/@haind-pwn/libical-icalvalue-decode-ical-string-oob-read
- https://www.vulncheck.com/advisories/libical-through-4.0.6-heap-out-of-bounds-read-via-icalvalue-decode-ical-string