Medium severity · published Oct 15, 2026
CVE-2026-111135
libfwsi through 20260522 Heap Out-of-Bounds Read via libfwsi_mtp_volume_values_read_data
6.1
CVSS
0.2%
EPSS
No
On KEV
Description
libfwsi through 20260522 contains a heap out-of-bounds read vulnerability in libfwsi_mtp_volume_values_read_data() that allows attackers to read past buffer bounds via crafted MTP volume shell items. Attackers can embed a 10 to 53 byte shell item with item data size of 44 or more in a .lnk file, jump list or shell bag to crash consuming processes.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libfwsi · libyal
through 20260522 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111135
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111135
github.com
https://github.com/libyal/libfwsi
github.com
https://github.com/libyal/libfwsi/blob/2f2aba25b888f37314a39d8c3e71c0e3ced56e59/libfwsi/libfwsi_mtp_volume_values.c#L248-L273
hackmd.io
https://hackmd.io/@haind-pwn/libfwsi-mtp-values-oob-read
www.vulncheck.com
https://www.vulncheck.com/advisories/libfwsi-through-20260522-heap-out-of-bounds-read-via-libfwsi-mtp-volume-values-read-data
hackmd.io
https://hackmd.io/@haind-pwn/cve-2026-111134-111135-libfwsi-mtp-values-oob-read
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