Vulnerability · Published Nov 3, 2021 · Assigned by mitre
CVE-2021-27836
Medium 6.5
In plain English
A medium-severity security flaw in the r-cran-readxl package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 67% of all known vulnerabilities).
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.2%top 32.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discoverered in in function xls_getWorkSheet in xls.c in libxls 1.6.2, allows attackers to cause a denial of service, via a crafted XLS file.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | r-cran-readxl | no fix listed | DEBIAN-CVE-2021-27836 |
| Debian:13 | r-cran-readxl | no fix listed | DEBIAN-CVE-2021-27836 |
| Debian:14 | r-cran-readxl | no fix listed | DEBIAN-CVE-2021-27836 |
| Ubuntu:22.04:LTS | r-cran-readxl | no fix listed | UBUNTU-CVE-2021-27836 |
| Ubuntu:24.04:LTS | r-cran-readxl | no fix listed | UBUNTU-CVE-2021-27836 |
| Ubuntu:25.10 | r-cran-readxl | no fix listed | UBUNTU-CVE-2021-27836 |
| Ubuntu:26.04:LTS | r-cran-readxl | no fix listed | UBUNTU-CVE-2021-27836 |
| Ubuntu:26.10 | r-cran-readxl | no fix listed | UBUNTU-CVE-2021-27836 |
Affected products (as reported)
References
- https://github.com/libxls/libxls/issues/94 x_refsource_MISC
- FEDORA-2021-785cdbddf9 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-033a5fe9e5 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-25e89d9374 vendor-advisory, x_refsource_FEDORA