| Name | CVE-2026-79591 |
| Description | A heap-buffer-overflow and use-after-free vulnerability exists in the xls_getCSS() function of libxls 1.6.3 due to insufficient validation of a file-controlled font index. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1147420 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| r-cran-readxl (PTS) | bookworm | 1.4.2-1 | vulnerable |
| trixie | 1.4.5-1 | vulnerable |
| forky, sid | 1.5.0-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| r-cran-readxl | source | (unstable) | (unfixed) | | | 1147420 |
Notes
[trixie] - r-cran-readxl <no-dsa> (Minor issue)
https://github.com/libxls/libxls/issues/161
https://github.com/libxls/libxls/pull/164/changes/902c8f9b13710c3a13b6232fb86626c5c729402c