Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2024-39936

Time-of-check Time-of-use (TOCTOU) Race Condition

Published: Jul 04, 2024 | Modified: Nov 29, 2025
CVSS 3.x
5.9
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.x
RedHat/V2
RedHat/V3
7.5 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2024-39936
CWEhttps://cwe.mitre.org/data/definitions/367.html

An issue was discovered in HTTP2 in Qt before 5.15.18, 6.x before 6.2.13, 6.3.x through 6.5.x before 6.5.7, and 6.6.x through 6.7.x before 6.7.3. Code to make security-relevant decisions about an established connection may execute too early, because the encrypted() signal has not yet been emitted and processed..

Weakness

The product checks the state of a resource before using that resource, but the resource’s state can change between the check and the use in a way that invalidates the results of the check.

Affected Software

NameVendorStart VersionEnd Version
QtQt*5.15.18 (excluding)
QtQt6.0.0 (including)6.2.13 (excluding)
QtQt6.3.0 (including)6.5.7 (excluding)
QtQt6.6.0 (including)6.7.3 (excluding)
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRedHatqt5-qtbase-0:5.9.7-6.el7_9*
Red Hat Enterprise Linux 8RedHatqt5-qtbase-0:5.15.3-8.el8_10*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHatqt5-qtbase-0:5.12.5-5.el8_2*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatqt5-qtbase-0:5.12.5-9.el8_4*
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRedHatqt5-qtbase-0:5.12.5-9.el8_4*
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRedHatqt5-qtbase-0:5.12.5-9.el8_4*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHatqt5-qtbase-0:5.15.2-5.el8_6*
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRedHatqt5-qtbase-0:5.15.2-5.el8_6*
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRedHatqt5-qtbase-0:5.15.2-5.el8_6*
Red Hat Enterprise Linux 8.8 Extended Update SupportRedHatqt5-qtbase-0:5.15.3-2.el8_8*
Red Hat Enterprise Linux 9RedHatqt5-qtbase-0:5.15.9-10.el9_4*
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRedHatqt5-qtbase-0:5.15.2-30.el9_0*
Red Hat Enterprise Linux 9.2 Extended Update SupportRedHatqt5-qtbase-0:5.15.3-2.el9_2*
Qtbase-opensource-srcUbuntuesm-apps/focal*
Qtbase-opensource-srcUbuntuesm-apps/jammy*
Qtbase-opensource-srcUbuntuesm-apps/noble*
Qtbase-opensource-srcUbuntufocal*
Qtbase-opensource-srcUbuntujammy*
Qtbase-opensource-srcUbuntumantic*
Qtbase-opensource-srcUbuntunoble*
Qtbase-opensource-srcUbuntuoracular*
Qtbase-opensource-srcUbuntuupstream*

Potential Mitigations

References

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