Out-of-bounds Read in Libyal Libewf
CVE-2026-111159
libewf through 20260924 contains a heap out-of-bounds read vulnerability in libewf_lef_extended_attribute_read_data() because UTF-16 name and value sizes are validated before being doubled. Attackers can supply a crafted .L01/.Lx01 file with oversized 'ea' metadata counts to crash the application or leak uninitialized heap memory through extended attributes.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind-pwn/libewf-lef-extended-attribute-utf16-size-oob-read (technical-description, exploit)
- github.com/libyal/libewf/blob/d76fd0bb21601e2969bc88ffdaeb861023f6a5b2/libewf/l… (technical-description)
- github.com/libyal/libewf/blob/d76fd0bb21601e2969bc88ffdaeb861023f6a5b2/libewf/l… (technical-description)
- github.com/libyal/libewf (product)
- www.vulncheck.com/advisories/libewf-through-20260924-heap-out-of-bounds-read-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111159?
- CVE-2026-111159 is a medium-severity vulnerability in Libyal Libewf, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-10-15.
- How severe is CVE-2026-111159?
- Medium severity. CVSS v3 base score is 6.1 out of 10.