Vulnerability · Published Oct 18, 2026 · Assigned by VulnCheck
CVE-2026-112055wvWare wv through 1.2.9 Stack Out-of-Bounds Read via wvGetPAPX_FKP and wvGetCHPX_FKP
Medium 5.5
In plain English
A medium-severity out-of-bounds read in wv from wvWare. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 92.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
wvWare wv through 1.2.9 contains a stack-based out-of-bounds read vulnerability in wvGetPAPX_FKP and wvGetCHPX_FKP caused by an unvalidated FKP run count. Attackers can supply a crafted .doc file with a large crun value to read kilobytes past the 512-byte stack buffer, crashing applications like AbiWord.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wv | no fix listed | DEBIAN-CVE-2026-112055 |
| Debian:13 | wv | no fix listed | DEBIAN-CVE-2026-112055 |
| Ubuntu:22.04:LTS | wv | no fix listed | UBUNTU-CVE-2026-112055 |
| Ubuntu:24.04:LTS | wv | no fix listed | UBUNTU-CVE-2026-112055 |
| Ubuntu:26.04:LTS | wv | no fix listed | UBUNTU-CVE-2026-112055 |
| Ubuntu:26.10 | wv | no fix listed | UBUNTU-CVE-2026-112055 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- https://hackmd.io/@haindpwn/wv-fkp-crun-stsh-cstd-oob-read third-party-advisory
- https://github.com/AbiWord/wv/blob/wv-1-2-9/fkp.c#L122 technical-description
- VulnCheck Advisory: wvWare wv through 1.2.9 Stack Out-of-Bounds Read via wvGetPAPX_FKP and wvGetCHPX_FKP third-party-advisory