CVE-2019-9805

critical

Published — · Modified —

CVSS v3

—

CVSS v2

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VIR risk

9.5

Description

A latent vulnerability exists in the Prio library where data may be read from uninitialized memory for some functions, leading to potential memory corruption. This vulnerability affects Firefox < 66.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2019-9805

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201903-11

OS impact

OS	Version	Status	Fixed in
arch		fixed	`66.0-1`
debian	sid	fixed	`66.0-1`

References

https://security.archlinux.org/ASA-201903-11
https://security-tracker.debian.org/tracker/CVE-2019-9805

Verify integrity in audit chain (admin only). AS-IS.