Description
Buffer overflow in the LZX decompression in CHM Lib (chmlib) 0.35, as used in products such as KchmViewer, has unknown impact and attack vectors.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | chmlib | 0.37-2 | — |
| Debian 13 | chmlib | 0.37-2 | — |
| Debian 12 | chmlib | 0.37-2 | — |
| Debian 3.1 | chmlib | 0.35-6sarge1 | DSA-886-1 |
Advisories 1
- DSA-886-1 chmlib - several Debian Security (DSA / DLA) · Mar 9, 2026