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.
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 | r-cran-readxl | 1.6.0-1 | — |
| Debian 13 | r-cran-readxl | No fix yet | — |
| Debian 12 | r-cran-readxl | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | r-cran-readxl | No fix yet | — |
| Ubuntu 26.04 LTS | r-cran-readxl | No fix yet | — |
| Ubuntu 24.04 LTS | r-cran-readxl | No fix yet | — |
| Ubuntu 22.04 LTS | r-cran-readxl | No fix yet | — |
| Ubuntu 20.04 LTS | r-cran-readxl | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | r-cran-readxl | No fix yet | — |
| Ubuntu 16.04 LTS | r-cran-readxl | No fix yet | — |