CVE-2019-11756

nss: Use-after-free in sftk_FreeSession due to improper refcounting

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Severity

Moderate

Red Hat Product Security

7.1

CVSS 3.0

Review impact separately from score.

Published · December 10, 2019

Updated · June 27, 2026

Description

A use-after-free flaw was found in Mozilla Network Security Services (NSS) related to PK11 session handling. An attacker could use this flaw to execute arbitrary code with the permissions of the user running the application compiled with NSS.

Statement

This flaw was fixed in upstream nss-3.47. Exploitation of this flaw is difficult and even impossible in most cases.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 7.1
CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

CWE-416 · Use After Free