Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck
CVE-2026-111159libewf through 20260924 Heap Out-of-Bounds Read via L01 Extended Attribute Parsing
Medium 6.1
In plain English
A medium-severity out-of-bounds read in libewf from libyal. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.1%top 97.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libewf | no fix listed | DEBIAN-CVE-2026-111159 |
| Debian:13 | libewf | no fix listed | DEBIAN-CVE-2026-111159 |
| Debian:14 | libewf | no fix listed | DEBIAN-CVE-2026-111159 |
| Ubuntu:22.04:LTS | libewf | no fix listed | UBUNTU-CVE-2026-111159 |
| Ubuntu:24.04:LTS | libewf | no fix listed | UBUNTU-CVE-2026-111159 |
| Ubuntu:26.04:LTS | libewf | no fix listed | UBUNTU-CVE-2026-111159 |
| Ubuntu:26.10 | libewf | no fix listed | UBUNTU-CVE-2026-111159 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
References
- https://hackmd.io/@haind-pwn/libewf-lef-extended-attribute-utf16-size-oob-read technical-description, exploit
- https://github.com/libyal/libewf/blob/d76fd0bb21601e2969bc88ffdaeb861023f6a5b2/libewf/libewf_lef_extended_attribute.c#L362-L408 technical-description
- https://github.com/libyal/libewf/blob/d76fd0bb21601e2969bc88ffdaeb861023f6a5b2/libewf/libewf_lef_extended_attribute.c#L456-L560 technical-description
- https://github.com/libyal/libewf product
- VulnCheck Advisory: libewf through 20260924 Heap Out-of-Bounds Read via L01 Extended Attribute Parsing third-party-advisory