CVE-2026-111269
libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_string
- State
- Published
- Severity
- 6.9 Medium
- Published
- Oct 15, 2026
- Updated
- Oct 26, 2026
- Reserved
- Oct 15, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.1 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H | VulnCheck |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
libicallibical |
|
References
- https://hackmd.io/@haind-pwn/libical-icalvalue-decode-ical-string-oob-readtechnical-description
- https://github.com/libical/libical/pull/1455patchissue-tracking
- https://github.com/libical/libical/commit/d753885ce2de7c105d6b8c405aa7aee1d98ad8depatch
- https://github.com/libical/libical/blob/9cfca65c122fa23b9680a28e0c9225a2fd015fc5/src/libical/icalvalue.c#L1608-L1645technical-description
- https://github.com/libical/libicalproduct
- VulnCheck Advisory: libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_stringthird-party-advisory
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