CVE-2026-111134

6.9 mediumEPSS 0.1%

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.

CVSS 4.0: 6.9CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 6.1CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
EPSS: 0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-25)
CWE: CWE-125
Published: 2026-10-15
Modified: 2026-10-16
Record from: the NVD, synced 2026-10-19

References

https://github.com/libyal/libfwsi
https://github.com/libyal/libfwsi/blob/2f2aba25b888f37314a39d8c3e71c0e3ced56e59/libfwsi/libfwsi_mtp_file_entry_values.c#L245-L267
https://hackmd.io/@haind-pwn/libfwsi-mtp-values-oob-read
https://www.vulncheck.com/advisories/libfwsi-through-20260522-heap-out-of-bounds-read-via-libfwsi-mtp-file-entry-values-read-data

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