CVE-2021-40391

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-11-19 · updated 2026-06-17
Weakness: CWE-390

Description

An out-of-bounds write vulnerability exists in the drill format T-code tool number functionality of Gerbv 2.7.0, dev (commit b5f1eacd), and the forked version of Gerbv (commit 71493260). A specially-crafted drill file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Affected products

Debian Linux: 9.0
Fedoraproject Fedora: 36
Gerbv: 2.7.0, 2.7.0-dev, 2.7.0-forked_dev

References

https://lists.debian.org/debian-lts-announce/2021/12/msg00003.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUM5GIUZJ7AVHVCXDZW6ZVCAPV2ISN47/
https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1402
https://lists.debian.org/debian-lts-announce/2021/12/msg00003.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUM5GIUZJ7AVHVCXDZW6ZVCAPV2ISN47/
https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1402

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