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Echo: qtbase-opensource-src: security update to 5.15.15+dfsg-6+e4

medium Tenable Self-Hosted Container Security Plugin ID 462625

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - An out-of-bounds read (buffer over-read) vulnerability exists in QTextCodec::codecForName() in Qt. When
 the function is called with a QByteArray that is not NUL-terminated (for example, one created with
 QByteArray::fromRawData()), the codec-name matching routine reads past the end of the supplied buffer. In
 most cases this results in an incorrect text codec being selected; in the worst case, if the over-read
 reaches unmapped memory, the process crashes (denial of service). The over-read is bounded by the length
 of the longest codec-name candidate, and the out-of-bounds bytes are only compared internally against Qt's
 fixed list of codec names, so no data is disclosed to an attacker. Applications that do not pass non-NUL-
 terminated QByteArrays to QTextCodec::codecForName() are not exposed. The affected code resides in the
 Qt5Compat module from Qt 6.0.0 onward, and in Qt Core (qtbase) in Qt 4.x and Qt 5.x. (CVE-2026-9499)

Solution

Update the qtbase-opensource-src library and its related packages to version 5.15.15+dfsg-6+e4 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-9499

Plugin Details

Severity: Medium

ID: 462625

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.22

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-9499

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 1.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/11/2026

Vulnerability Publication Date: 5/7/2026

Reference Information

CVE: CVE-2026-9499