CVE-2026-111134
libfwsi through 20260522 Heap Out-of-Bounds Read via libfwsi_mtp_file_entry_values_read_data
- State
- Published
- Severity
- 6.9 Medium
- Published
- Oct 15, 2026
- Updated
- Oct 27, 2026
- Reserved
- Oct 15, 2026
Description
libfwsi through 20260522 contains a heap out-of-bounds read vulnerability in libfwsi_mtp_file_entry_values_read_data() that allows attackers to read past buffer bounds via crafted MTP file entry shell items. Attackers can embed a 10 to 73 byte shell item with item data size of 44 or more in .lnk files, jump lists or shell bags to crash libfwsi consumers.
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 |
|---|---|
libfwsilibyal |
|
References
- https://hackmd.io/@haind-pwn/libfwsi-mtp-values-oob-readtechnical-description
- https://github.com/libyal/libfwsi/blob/2f2aba25b888f37314a39d8c3e71c0e3ced56e59/libfwsi/libfwsi_mtp_file_entry_values.c#L245-L267technical-description
- https://github.com/libyal/libfwsiproduct
- VulnCheck Advisory: libfwsi through 20260522 Heap Out-of-Bounds Read via libfwsi_mtp_file_entry_values_read_datathird-party-advisory
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