This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-79591 →

DEBIAN-CVE-2026-79591

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-c...

Original description

The description as published by the source.

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: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 r-cran-readxl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 r-cran-readxl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 r-cran-readxl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

References

advisory security-tracker.debian.org