Description
A vulnerability was found in PHP where setting the environment variable PHP_CLI_SERVER_WORKERS to a large value leads to a heap buffer overflow.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | php | — | 8.0.22 |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Software Collections | — | — |
| Fedora | Fedora | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 11 | php7.4 | 7.4.33-1+deb11u6 | DLA-3920-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | php8.1 | 8.1.2-1ubuntu2.17 | USN-6757-2, USN-6757-1 |
| Ubuntu 20.04 LTS | php7.4 | 7.4.3-4ubuntu2.22 | USN-6757-2, USN-6757-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | php7.2 | 7.2.24-0ubuntu0.18.04.17+esm3 | USN-6757-1 |
| Ubuntu Pro 16.04 LTS | php7.0 | 7.0.33-0ubuntu0.16.04.16+esm9 | USN-6757-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | apcu-panel +2 | 5.1.20-1.module+el8.6.0+13671+84712317 | RHSA-2023:0848 |
| RHEL 8 | libzip +2 | 1.7.3-1.module+el8.6.0+13671+84712317 | RHSA-2023:0848 |
| RHEL 8 | php +23 | 8.0.27-1.module+el8.7.0+17863+0ad92cd2 | RHSA-2023:0848 |
| RHEL 8 | php-pear | 1:1.10.13-1.module+el8.6.0+13671+84712317 | RHSA-2023:0848 |
| RHEL 8 | php-pecl-rrd | 2.0.3-1.module+el8.6.0+13671+84712317 | RHSA-2023:0848 |
| RHEL 8 | php-pecl-xdebug3 | 3.1.2-1.module+el8.6.0+13671+84712317 | RHSA-2023:0848 |
| RHEL 8 | php-pecl-zip | 1.19.2-1.module+el8.6.0+13671+84712317 | RHSA-2023:0848 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | apcu-panel +2 | 5.1.20-1.module_el8.6.0+2739+efabdb8f | ALSA-2023:0848 |
| AlmaLinux 8 | libzip +2 | 1.7.3-1.module_el8.6.0+2739+efabdb8f | ALSA-2023:0848 |
| AlmaLinux 8 | php +23 | 8.0.27-1.module_el8.7.0+3401+dfb61c00 | ALSA-2023:0848 |
| AlmaLinux 8 | php-pear | 1:1.10.13-1.module_el8.6.0+2739+efabdb8f | ALSA-2023:0848 |
| AlmaLinux 8 | php-pecl-rrd | 2.0.3-1.module_el8.6.0+2739+efabdb8f | ALSA-2023:0848 |
| AlmaLinux 8 | php-pecl-xdebug3 | 3.1.2-1.module_el8.6.0+2739+efabdb8f | ALSA-2023:0848 |
| AlmaLinux 8 | php-pecl-zip | 1.19.2-1.module_el8.6.0+2739+efabdb8f | ALSA-2023:0848 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | php7 +4 | 7.4.33-150400.4.22.1 | SUSE-SU-2023:1846-1 |
| SLES 12 SP5 | php74 | 7.4.33-1.56.1 | SUSE-SU-2023:1847-1 |
| SLES 12 | php74 | 7.4.33-1.56.1 | SUSE-SU-2023:1847-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | php7 | 7.4.33-150200.3.54.1 | SUSE-SU-2023:1846-1, SUSE-SU-2023:1583-1 |
| openSUSE Leap 15.4 | php7-fpm +3 | 7.4.33-150400.4.22.1 | SUSE-SU-2023:1846-1 |
| openSUSE Leap 15.4 | php7-test | 7.4.33-150400.4.22.2 | SUSE-SU-2023:1846-1 |
Advisories 13
- ALSA-2023:0848 Moderate: php:8.0 security update AlmaLinux Security Advisories · Nov 5, 2026
- RHSA-2023:0848 Red Hat Security Advisory: php:8.0 security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-6757-1 php7.0, php7.2, php7.4, php8.1 vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-6757-2 php7.4, php8.1, php8.2 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-3920-1 php7.4 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2023:1583-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:1847-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:1846-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-26-027-02 Festo Didactic SE MES PC CISA ICS & IT advisories · Jan 27, 2026
- FSA-202402 Several Vulnerabilities in MES PC (Windows 10) CERT@VDE · Dec 8, 2025
- WID-SEC-2023-0695 PHP: Schwachstelle ermöglicht nicht spezifizierten Angriff BSI CERT-Bund (WID) · Oct 14, 2024
- ICSA-24-046-11 Siemens SCALANCE XCM-/XRM-300 CISA ICS & IT advisories · Feb 13, 2024
- SSA-806742 SSA-806742: Multiple Vulnerabilities in SCALANCE XCM-/XRM-300 before V2.4 Siemens ProductCERT · Feb 13, 2024