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Vulnerabilities / CVE-2026-6104

critical

CVE-2026-6104

php: global buffer over-read in mb_convert_encoding() with attacker-supplied encoding

Published Modified CWE 125
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Red Hat8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Bitnami9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, Bitnami. Rated lower by Red Hat (high), AlmaLinux (high), Amazon (high), Oracle (high), Rocky Linux (high), Ubuntu (medium).

Description

In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, when an encoding name containing an embedded NUL byte is passed to mb_convert_encoding() or related mbstring functions, the code incorrectly assumes that when strncasecmp() returns 0 it means the strings have the same length. This can lead to out-of-bounds read of global memory, potentially causing a crash or information disclosure or crash. Affected functions include mb_convert_encoding(), mb_detect_encoding(), mb_convert_variables(), and mb_detect_order(), as well as the mbstring.detect_order and mbstring.http_output INI settings.

Affected packages and fixed versions

SourcePackageFixed in
bitnami::Bitnami Vulnerability Databaselibphp, php, php-min8.4.21, 8.5.6
alma 10php8.4, php8.4-bcmath, php8.4-cli and 22 more8.4.21-1.el10_2
alpine 3.22php848.4.27-r0
alpine 3.23php84, php858.4.21-r0 and 1 more
alpine 3.24php858.5.6-r0
alpine edgephp858.5.6-r0
amazon linux 2023php8.4, php8.4-bcmath, php8.4-bcmath-debuginfo and 55 more8.4.21-1.amzn2023.0.1
debian 13php8.48.4.21-1~deb13u1
debian 14php8.48.4.21-1
echophp8.48.4.21-1~deb13u1
minimosphp-8.4, php-8.58.4.21-r0 and 1 more
rapidfort alma 10php8.4, php8.4-bcmath, php8.4-cli and 22 more8.4.21-1.el10_2
Show all 245 entries from 26 sources
SourcePackageFixed in
bitnami::Bitnami Vulnerability Databaselibphp8.4.21, 8.5.6
bitnami::Bitnami Vulnerability Databasephp8.4.21, 8.5.6
bitnami::Bitnami Vulnerability Databasephp-min8.4.21, 8.5.6
alma 10php8.48.4.21-1.el10_2
alma 10php8.4-bcmath8.4.21-1.el10_2
alma 10php8.4-cli8.4.21-1.el10_2
alma 10php8.4-common8.4.21-1.el10_2
alma 10php8.4-dba8.4.21-1.el10_2
alma 10php8.4-dbg8.4.21-1.el10_2
alma 10php8.4-devel8.4.21-1.el10_2
alma 10php8.4-embedded8.4.21-1.el10_2
alma 10php8.4-enchant8.4.21-1.el10_2
alma 10php8.4-ffi8.4.21-1.el10_2
alma 10php8.4-fpm8.4.21-1.el10_2
alma 10php8.4-gd8.4.21-1.el10_2
alma 10php8.4-gmp8.4.21-1.el10_2
alma 10php8.4-intl8.4.21-1.el10_2
alma 10php8.4-ldap8.4.21-1.el10_2
alma 10php8.4-mbstring8.4.21-1.el10_2
alma 10php8.4-mysqlnd8.4.21-1.el10_2
alma 10php8.4-odbc8.4.21-1.el10_2
alma 10php8.4-opcache8.4.21-1.el10_2
alma 10php8.4-pdo8.4.21-1.el10_2
alma 10php8.4-pgsql8.4.21-1.el10_2
alma 10php8.4-process8.4.21-1.el10_2
alma 10php8.4-snmp8.4.21-1.el10_2
alma 10php8.4-soap8.4.21-1.el10_2
alma 10php8.4-xml8.4.21-1.el10_2
alpine 3.22php848.4.27-r0
alpine 3.23php848.4.21-r0
alpine 3.23php858.5.6-r0
alpine 3.24php858.5.6-r0
alpine edgephp858.5.6-r0
amazon linux 2023php8.48.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-bcmath8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-bcmath-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-cli8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-cli-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-common8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-common-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-dba8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-dba-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-dbg8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-dbg-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-debugsource8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-devel8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-embedded8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-embedded-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-enchant8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-enchant-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-ffi8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-ffi-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-fpm8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-fpm-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-gd8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-gd-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-gmp8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-gmp-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-intl8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-intl-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-ldap8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-ldap-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-mbstring8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-mbstring-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-modphp8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-modphp-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-mysqlnd8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-mysqlnd-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-odbc8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-odbc-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-opcache8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-opcache-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-pdo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-pdo-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-pgsql8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-pgsql-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-process8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-process-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-snmp8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-snmp-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-soap8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-soap-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-sodium8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-sodium-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-tidy8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-tidy-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-xml8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-xml-debuginfo8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-zip8.4.21-1.amzn2023.0.1
amazon linux 2023php8.4-zip-debuginfo8.4.21-1.amzn2023.0.1
debian 13php8.48.4.21-1~deb13u1
debian 14php8.48.4.21-1
echophp8.48.4.21-1~deb13u1
minimosphp-8.48.4.21-r0
minimosphp-8.58.5.6-r0
rapidfort alma 10php8.48.4.21-1.el10_2
rapidfort alma 10php8.4-bcmath8.4.21-1.el10_2
rapidfort alma 10php8.4-cli8.4.21-1.el10_2
rapidfort alma 10php8.4-common8.4.21-1.el10_2
rapidfort alma 10php8.4-dba8.4.21-1.el10_2
rapidfort alma 10php8.4-dbg8.4.21-1.el10_2
rapidfort alma 10php8.4-devel8.4.21-1.el10_2
rapidfort alma 10php8.4-embedded8.4.21-1.el10_2
rapidfort alma 10php8.4-enchant8.4.21-1.el10_2
rapidfort alma 10php8.4-ffi8.4.21-1.el10_2
rapidfort alma 10php8.4-fpm8.4.21-1.el10_2
rapidfort alma 10php8.4-gd8.4.21-1.el10_2
rapidfort alma 10php8.4-gmp8.4.21-1.el10_2
rapidfort alma 10php8.4-intl8.4.21-1.el10_2
rapidfort alma 10php8.4-ldap8.4.21-1.el10_2
rapidfort alma 10php8.4-mbstring8.4.21-1.el10_2
rapidfort alma 10php8.4-mysqlnd8.4.21-1.el10_2
rapidfort alma 10php8.4-odbc8.4.21-1.el10_2
rapidfort alma 10php8.4-opcache8.4.21-1.el10_2
rapidfort alma 10php8.4-pdo8.4.21-1.el10_2
rapidfort alma 10php8.4-pgsql8.4.21-1.el10_2
rapidfort alma 10php8.4-process8.4.21-1.el10_2
rapidfort alma 10php8.4-snmp8.4.21-1.el10_2
rapidfort alma 10php8.4-soap8.4.21-1.el10_2
rapidfort alma 10php8.4-xml8.4.21-1.el10_2
rapidfort alpine 3.20php848.4.21-r0
rapidfort alpine 3.21php848.4.21-r0
rapidfort alpine 3.22php848.4.21-r0
rapidfort alpine 3.23php848.4.21-r0
rapidfort alpine 3.24php848.4.21-r0
rapidfort amazon linux 2023php8.1no fix listed
rapidfort amazon linux 2023php8.1-pecl-apcuno fix listed
rapidfort amazon linux 2023php8.1-pecl-igbinaryno fix listed
rapidfort amazon linux 2023php8.1-pecl-memcachedno fix listed
rapidfort amazon linux 2023php8.1-pecl-msgpackno fix listed
rapidfort amazon linux 2023php8.1-pecl-redis6no fix listed
rapidfort amazon linux 2023php8.48.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-bcmath8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-cli8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-common8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-dba8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-dbg8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-devel8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-embedded8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-enchant8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-ffi8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-fpm8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-gd8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-gmp8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-intl8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-ldap8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-mbstring8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-modphp8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-mysqlnd8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-odbc8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-opcache8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-pdo8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-pgsql8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-process8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-snmp8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-soap8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-sodium8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-tidy8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-xml8.4.21-1.amzn2023.0.1
rapidfort amazon linux 2023php8.4-zip8.4.21-1.amzn2023.0.1
rapidfort fedora 43php8.4.21-1.fc43
rapidfort fedora 43php-bcmath8.4.21-1.fc43
rapidfort fedora 43php-cli8.4.21-1.fc43
rapidfort fedora 43php-common8.4.21-1.fc43
rapidfort fedora 43php-dba8.4.21-1.fc43
rapidfort fedora 43php-dbg8.4.21-1.fc43
rapidfort fedora 43php-devel8.4.21-1.fc43
rapidfort fedora 43php-embedded8.4.21-1.fc43
rapidfort fedora 43php-enchant8.4.21-1.fc43
rapidfort fedora 43php-ffi8.4.21-1.fc43
rapidfort fedora 43php-fpm8.4.21-1.fc43
rapidfort fedora 43php-gd8.4.21-1.fc43
rapidfort fedora 43php-gmp8.4.21-1.fc43
rapidfort fedora 43php-intl8.4.21-1.fc43
rapidfort fedora 43php-ldap8.4.21-1.fc43
rapidfort fedora 43php-mbstring8.4.21-1.fc43
rapidfort fedora 43php-mysqlnd8.4.21-1.fc43
rapidfort fedora 43php-odbc8.4.21-1.fc43
rapidfort fedora 43php-opcache8.4.21-1.fc43
rapidfort fedora 43php-pdo8.4.21-1.fc43
rapidfort fedora 43php-pdo-dblib8.4.21-1.fc43
rapidfort fedora 43php-pdo-firebird8.4.21-1.fc43
rapidfort fedora 43php-pgsql8.4.21-1.fc43
rapidfort fedora 43php-process8.4.21-1.fc43
rapidfort fedora 43php-snmp8.4.21-1.fc43
rapidfort fedora 43php-soap8.4.21-1.fc43
rapidfort fedora 43php-sodium8.4.21-1.fc43
rapidfort fedora 43php-tidy8.4.21-1.fc43
rapidfort fedora 43php-xml8.4.21-1.fc43
rapidfort Oracle Linux 10php8.40:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-bcmath0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-cli0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-common0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-dba0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-dbg0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-devel0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-embedded0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-enchant0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-ffi0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-fpm0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-gd0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-gmp0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-intl0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-ldap0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-mbstring0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-mysqlnd0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-odbc0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-opcache0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-pdo0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-pgsql0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-process0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-snmp0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-soap0:8.4.21-1.el10_2
rapidfort Oracle Linux 10php8.4-xml0:8.4.21-1.el10_2
rapidfort ubuntu 20.04php8.50:8.5.4-0ubuntu1.1
rapidfort ubuntu 22.04php8.50:8.5.4-0ubuntu1.1
rapidfort ubuntu 24.04php8.50:8.5.4-0ubuntu1.1
rocky 10php8.48.4.21-1.el10_2
rocky 10php8.4-bcmath8.4.21-1.el10_2
rocky 10php8.4-cli8.4.21-1.el10_2
rocky 10php8.4-common8.4.21-1.el10_2
rocky 10php8.4-dba8.4.21-1.el10_2
rocky 10php8.4-dbg8.4.21-1.el10_2
rocky 10php8.4-devel8.4.21-1.el10_2
rocky 10php8.4-embedded8.4.21-1.el10_2
rocky 10php8.4-enchant8.4.21-1.el10_2
rocky 10php8.4-ffi8.4.21-1.el10_2
rocky 10php8.4-fpm8.4.21-1.el10_2
rocky 10php8.4-gd8.4.21-1.el10_2
rocky 10php8.4-gmp8.4.21-1.el10_2
rocky 10php8.4-intl8.4.21-1.el10_2
rocky 10php8.4-ldap8.4.21-1.el10_2
rocky 10php8.4-mbstring8.4.21-1.el10_2
rocky 10php8.4-mysqlnd8.4.21-1.el10_2
rocky 10php8.4-odbc8.4.21-1.el10_2
rocky 10php8.4-opcache8.4.21-1.el10_2
rocky 10php8.4-pdo8.4.21-1.el10_2
rocky 10php8.4-pgsql8.4.21-1.el10_2
rocky 10php8.4-process8.4.21-1.el10_2
rocky 10php8.4-snmp8.4.21-1.el10_2
rocky 10php8.4-soap8.4.21-1.el10_2
rocky 10php8.4-xml8.4.21-1.el10_2
ubuntu 25.10php8.48.4.11-1ubuntu1.2
ubuntu 26.04php8.58.5.4-0ubuntu1.1

References

All 30 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.