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Fencer Vulns
high 8.6

CVE-2024-39936 json

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…

published 2024-07-04 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-38310

cvss
8.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

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..

Patch / fix

  • qt qt 5.15.18, 6.2.13, 6.5.7, 6.7.3
  • qt6-base Debian 14, Debian 13 6.8.2+dfsg-5
  • qtbase-opensource-src Debian 12 5.15.8+dfsg-11+deb12u3
  • qtbase-opensource-src Debian 14, Debian 13 5.15.13+dfsg-3

debian advisories DEBIAN-CVE-2024-39936

  • qtbase-opensource-src Ubuntu Pro 20.04 LTS 5.12.8+dfsg-0ubuntu2.1+esm3
  • qtbase-opensource-src Ubuntu Pro 22.04 LTS 5.15.3+dfsg-2ubuntu0.2+esm3
  • qtbase-opensource-src Ubuntu Pro 24.04 LTS 5.15.13+dfsg-1ubuntu1+esm1

ubuntu advisories UBUNTU-CVE-2024-39936

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • qt5-qtbase RHEL 8 5.15.3-8.el8_10
  • qt5-qtbase-gui RHEL 8 5.15.3-8.el8_10
  • qt5-qtbase-odbc RHEL 8 5.15.3-8.el8_10
  • qt5-qtbase-mysql RHEL 8 5.15.3-8.el8_10
  • qt5-qtbase-common RHEL 8 5.15.3-8.el8_10
  • qt5-qtbase-examples RHEL 8 5.15.3-8.el8_10
  • qt5-qtbase-postgresql RHEL 8 5.15.3-8.el8_10
  • qt5-qtbase RHEL 9 5.15.9-10.el9_4

red hat advisories RHSA-2024:4646RHSA-2024:4645RHSA-2024:4647RHSA-2024:4644RHSA-2024:4639RHSA-2024:4638

  • libqt5-qtbase SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +4 more 5.12.7-150200.4.29.1
  • libqt5-qtbase SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +3 more 5.15.2+kde294-150400.6.15.1
  • libqt5-qtbase SLE Module for Desktop Applications 15 SP5, SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.15.8+kde185-150500.4.22.1
  • libqt5-qtbase SLE Module for Desktop Applications 15 SP6, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 5.15.12+kde151-150600.3.6.1
  • qt6-base SLE Module for Package Hub 15 SP6, SLE Module for Desktop Applications 15 SP6, openSUSE Leap 15.6 6.6.3-150600.3.3.1
  • qt6-base SLE Module for Package Hub 15 SP5, SLE Module for Desktop Applications 15 SP5, openSUSE Leap 15.5 6.4.2-150500.3.20.2

suse advisories SUSE-SU-2024:2946-1SUSE-SU-2024:2890-1SUSE-SU-2024:2883-1SUSE-SU-2024:2882-1SUSE-SU-2024:2875-1SUSE-SU-2024:2873-1

  • libqt5-qtbase openSUSE Tumbleweed 5.15.14+kde143-1.1
  • qt6-base openSUSE Tumbleweed 6.7.2-2.1

opensuse advisories openSUSE-SU-2024:14215-1openSUSE-SU-2024:14114-1

  • qt5-qtbase AlmaLinux 8 5.15.3-8.el8_10
  • qt5-qtbase-gui AlmaLinux 8 5.15.3-8.el8_10
  • qt5-qtbase-odbc AlmaLinux 8 5.15.3-8.el8_10
  • qt5-qtbase-mysql AlmaLinux 8 5.15.3-8.el8_10
  • qt5-qtbase-common AlmaLinux 8 5.15.3-8.el8_10
  • qt5-qtbase-examples AlmaLinux 8 5.15.3-8.el8_10
  • qt5-qtbase-postgresql AlmaLinux 8 5.15.3-8.el8_10
  • qt5-qtbase AlmaLinux 9 5.15.9-10.el9_4

almalinux advisories ALSA-2024:4617ALSA-2024:4623

  • qt5-qtbase Rocky Linux 9 5.15.9-10.el9_4
  • qt5-qtbase Rocky Linux 8 5.15.3-8.el8_10

rocky linux advisories RLSA-2024:4623RLSA-2024:4617

  • qt6-qtbase Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 6.7.2-r1

alpine advisories ALPINE-CVE-2024-39936

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • qt5-qtbase CBL-Mariner 2.0 5.12.11-13

azure linux advisories AZL-43192

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-39936 updated cvss 7.5

qtbase: qtbase: Delay any communication until encrypted() can be responded to

  • Red Hat CodeReady Linux Builder EUS (v.8.8) qt5-qtbase-static 5.15.3-2.el8_8, qt5-qtbase-debuginfo 5.15.3-2.el8_8, qt5-qtbase-debugsource 5.15.3-2.el8_8, qt5-qtbase-gui-debuginfo 5.15.3-2.el8_8, qt5-qtbase-odbc-debuginfo 5.15.3-2.el8_8, qt5-qtbase-devel-debuginfo 5.15.3-2.el8_8, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4639
  • Red Hat CodeReady Linux Builder EUS (v.9.2) qt5-qtbase-static 5.15.3-2.el9_2, qt5-qtbase-debuginfo 5.15.3-2.el9_2, qt5-qtbase-debugsource 5.15.3-2.el9_2, qt5-qtbase-gui-debuginfo 5.15.3-2.el9_2, qt5-qtbase-odbc-debuginfo 5.15.3-2.el9_2, qt5-qtbase-devel-debuginfo 5.15.3-2.el9_2, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4638
  • Red Hat Enterprise Linux AppStream (v. 8) qt5-qtbase 5.15.3-8.el8_10, qt5-qtbase-gui 5.15.3-8.el8_10, qt5-qtbase-odbc 5.15.3-8.el8_10, qt5-qtbase-mysql 5.15.3-8.el8_10, qt5-qtbase-common 5.15.3-8.el8_10, qt5-qtbase-examples 5.15.3-8.el8_10, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4617
  • Red Hat Enterprise Linux AppStream (v. 9) qt5-qtbase 5.15.9-10.el9_4, qt5-qtbase-gui 5.15.9-10.el9_4, qt5-qtbase-odbc 5.15.9-10.el9_4, qt5-qtbase-mysql 5.15.9-10.el9_4, qt5-qtbase-common 5.15.9-10.el9_4, qt5-qtbase-examples 5.15.9-10.el9_4, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4623
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) qt5-qtbase 5.12.5-5.el8_2, qt5-qtbase-gui 5.12.5-5.el8_2, qt5-qtbase-odbc 5.12.5-5.el8_2, qt5-qtbase-mysql 5.12.5-5.el8_2, qt5-qtbase-common 5.12.5-5.el8_2, qt5-qtbase-examples 5.12.5-5.el8_2, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4646
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) qt5-qtbase 5.12.5-9.el8_4, qt5-qtbase-gui 5.12.5-9.el8_4, qt5-qtbase-odbc 5.12.5-9.el8_4, qt5-qtbase-mysql 5.12.5-9.el8_4, qt5-qtbase-common 5.12.5-9.el8_4, qt5-qtbase-examples 5.12.5-9.el8_4, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4621
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) qt5-qtbase 5.15.2-5.el8_6, qt5-qtbase-gui 5.15.2-5.el8_6, qt5-qtbase-odbc 5.15.2-5.el8_6, qt5-qtbase-mysql 5.15.2-5.el8_6, qt5-qtbase-common 5.15.2-5.el8_6, qt5-qtbase-examples 5.15.2-5.el8_6, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4644
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) qt5-qtbase 5.12.5-9.el8_4, qt5-qtbase-gui 5.12.5-9.el8_4, qt5-qtbase-odbc 5.12.5-9.el8_4, qt5-qtbase-mysql 5.12.5-9.el8_4, qt5-qtbase-common 5.12.5-9.el8_4, qt5-qtbase-examples 5.12.5-9.el8_4, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4621
show 10 more
  • Red Hat Enterprise Linux AppStream E4S (v.8.6) qt5-qtbase 5.15.2-5.el8_6, qt5-qtbase-gui 5.15.2-5.el8_6, qt5-qtbase-odbc 5.15.2-5.el8_6, qt5-qtbase-mysql 5.15.2-5.el8_6, qt5-qtbase-common 5.15.2-5.el8_6, qt5-qtbase-examples 5.15.2-5.el8_6, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4644
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) qt5-qtbase 5.15.2-30.el9_0, qt5-qtbase-gui 5.15.2-30.el9_0, qt5-qtbase-odbc 5.15.2-30.el9_0, qt5-qtbase-mysql 5.15.2-30.el9_0, qt5-qtbase-common 5.15.2-30.el9_0, qt5-qtbase-examples 5.15.2-30.el9_0, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4645
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) qt5-qtbase 5.15.3-2.el8_8, qt5-qtbase-gui 5.15.3-2.el8_8, qt5-qtbase-odbc 5.15.3-2.el8_8, qt5-qtbase-mysql 5.15.3-2.el8_8, qt5-qtbase-common 5.15.3-2.el8_8, qt5-qtbase-examples 5.15.3-2.el8_8, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4639
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) qt5-qtbase 5.15.3-2.el9_2, qt5-qtbase-gui 5.15.3-2.el9_2, qt5-qtbase-odbc 5.15.3-2.el9_2, qt5-qtbase-mysql 5.15.3-2.el9_2, qt5-qtbase-common 5.15.3-2.el9_2, qt5-qtbase-examples 5.15.3-2.el9_2, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4638
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) qt5-qtbase 5.12.5-9.el8_4, qt5-qtbase-gui 5.12.5-9.el8_4, qt5-qtbase-odbc 5.12.5-9.el8_4, qt5-qtbase-mysql 5.12.5-9.el8_4, qt5-qtbase-common 5.12.5-9.el8_4, qt5-qtbase-examples 5.12.5-9.el8_4, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4621
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) qt5-qtbase 5.15.2-5.el8_6, qt5-qtbase-gui 5.15.2-5.el8_6, qt5-qtbase-odbc 5.15.2-5.el8_6, qt5-qtbase-mysql 5.15.2-5.el8_6, qt5-qtbase-common 5.15.2-5.el8_6, qt5-qtbase-examples 5.15.2-5.el8_6, +1 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4644
  • Red Hat Enterprise Linux CRB (v. 8) qt5-qtbase-static 5.15.3-8.el8_10, qt5-qtbase-debuginfo 5.15.3-8.el8_10, qt5-qtbase-debugsource 5.15.3-8.el8_10, qt5-qtbase-gui-debuginfo 5.15.3-8.el8_10, qt5-qtbase-odbc-debuginfo 5.15.3-8.el8_10, qt5-qtbase-devel-debuginfo 5.15.3-8.el8_10, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4617
  • Red Hat Enterprise Linux CRB (v. 9) qt5-qtbase-static 5.15.9-10.el9_4, qt5-qtbase-debuginfo 5.15.9-10.el9_4, qt5-qtbase-debugsource 5.15.9-10.el9_4, qt5-qtbase-gui-debuginfo 5.15.9-10.el9_4, qt5-qtbase-odbc-debuginfo 5.15.9-10.el9_4, qt5-qtbase-devel-debuginfo 5.15.9-10.el9_4, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4623
  • Red Hat Enterprise Linux Server (v. 7 ELS) qt5-qtbase 5.9.7-6.el7_9, qt5-qtbase-gui 5.9.7-6.el7_9, qt5-rpm-macros 5.9.7-6.el7_9, qt5-qtbase-odbc 5.9.7-6.el7_9, qt5-qtbase-mysql 5.9.7-6.el7_9, qt5-qtbase-common 5.9.7-6.el7_9, +1 more Red Hat Enterprise Linux Server Optional (v. 7 ELS) qt5-qtbase-examples 5.9.7-6.el7_9
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4647
  • Red Hat Enterprise Linux 10 qt6-qtbase
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.6 CVSS:3.1/AC:L/AV:N/A:N/C:H/I:N/PR:N/S:C/UI:N
CNA 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
NVD 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Classification

Weakness
  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.