Description
php_openssl_matches_wildcard_name() in ext/openssl/xp_ssl.c underflows the length argument passed to memchr() when a TLS server certificate presents a wildcard name whose literal characters are together longer than the hostname being verified. A malicious server presenting such a certificate makes the PHP client read up to SIZE_MAX bytes past the end of a heap allocation. The path is reachable from any default client stream, because verify_peer_name is enabled by default.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| PHP Group | PHP | 8.2.* – < 8.2.34, 8.3.* – < 8.3.35, 8.4.* – < 8.4.26, 8.5.* – < 8.5.11 | 8.2.34 |
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 14 | php8.4 | 8.4.26-1 | — |
| Debian 13 | php8.4 | 8.4.26-1~deb13u1 | — |
| Debian 12 | php8.2 | 8.2.34-1~deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | php8.5 | 8.5.9-0ubuntu2 | USN-8936-1 |
| Ubuntu 26.04 LTS | php8.5 | 8.5.4-0ubuntu1.4 | USN-8936-1 |
| Ubuntu 24.04 LTS | php8.3 | 8.3.6-0ubuntu0.24.04.12 | USN-8936-1 |
| Ubuntu 22.04 LTS | php8.1 | 8.1.2-1ubuntu2.27 | USN-8936-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | php7.4 | 7.4.3-4ubuntu2.29+esm4 | USN-8936-1 |
| Ubuntu Pro 18.04 LTS | php7.2 | 7.2.24-0ubuntu0.18.04.17+esm13 | USN-8936-1 |
| Ubuntu Pro 16.04 LTS | php7.0 | 7.0.33-0ubuntu0.16.04.16+esm21 | USN-8936-1 |
| Ubuntu Pro 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.29+esm17 | USN-8936-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | php +26 | 8.5.11-2.hum1 | RHSA-2026:70720 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | apcu-panel +2 | 5.1.18-1.module_el8.6.0+2750+78feabcb | ALSA-2026:87080 |
| AlmaLinux 8 | libzip +1 | 1.6.1-1.module_el8.6.0+2750+78feabcb | ALSA-2026:87080 |
| AlmaLinux 8 | libzip-tools | 1.6.1-1.module_el8.6.0+3239+bedf0508 | ALSA-2026:87080 |
| AlmaLinux 8 | php +25 | 7.4.33-8.module_el8.10.0+4321+cf5fd4bb | ALSA-2026:87080 |
| AlmaLinux 8 | php-pear | 1:1.10.13-1.module_el8.10.0+3935+28808425 | ALSA-2026:87080 |
| AlmaLinux 8 | php-pecl-rrd | 2.0.1-1.module_el8.6.0+2750+78feabcb | ALSA-2026:87080 |
| AlmaLinux 8 | php-pecl-xdebug | 2.9.5-1.module_el8.6.0+2750+78feabcb | ALSA-2026:87080 |
| AlmaLinux 8 | php-pecl-zip | 1.18.2-1.module_el8.6.0+2750+78feabcb | ALSA-2026:87080 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | libzip | 1.6.1-1.module+el8.10.0+1604+6558efc7 | RLSA-2026:87080 |
| Rocky Linux 8 | php | 7.4.33-8.module+el8.10.0+40393+c071e357 | RLSA-2026:87080 |
| Rocky Linux 8 | php-pear | 1:1.10.13-1.module+el8.10.0+1604+6558efc7 | RLSA-2026:87080 |
| Rocky Linux 8 | php-pecl-apcu | 5.1.18-1.module+el8.10.0+1604+6558efc7 | RLSA-2026:87080 |
| Rocky Linux 8 | php-pecl-rrd | 2.0.1-1.module+el8.4.0+414+2e7afcdd | RLSA-2026:87080 |
| Rocky Linux 8 | php-pecl-xdebug | 2.9.5-1.module+el8.10.0+1604+6558efc7 | RLSA-2026:87080 |
| Rocky Linux 8 | php-pecl-zip | 1.18.2-1.module+el8.10.0+1604+6558efc7 | RLSA-2026:87080 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | php7 +4 | 7.4.33-150400.4.81.1 | SUSE-SU-2026:4853-1 |
| SLES 15 SP7 | php7-test | 7.4.33-150400.4.81.2 | SUSE-SU-2026:4853-1 |
| SLES 15 SP7 | php8 +5 | 8.3.35-150700.3.21.1 | SUSE-SU-2026:4602-1 |
| SLES 15 SP6 | php7 +3 | 7.4.33-150400.4.81.1 | SUSE-SU-2026:4853-1 |
| SLES 15 SP6 | php8 +5 | 8.2.34-150600.3.36.1 | SUSE-SU-2026:4603-1 |
| SLES 15 SP5 | php7 +3 | 7.4.33-150400.4.81.1 | SUSE-SU-2026:4853-1 |
| SLES 15 SP5 | php8 +4 | 8.0.30-150400.4.76.1 | SUSE-SU-2026:4651-1 |
| SLES 15 SP5 | php8-test | 8.0.30-150400.4.76.2 | SUSE-SU-2026:4651-1 |
| SLES 15 SP4 | php7 +3 | 7.4.33-150400.4.81.1 | SUSE-SU-2026:4853-1 |
| SLES 15 SP4 | php8 +4 | 8.0.30-150400.4.76.1 | SUSE-SU-2026:4651-1 |
| SLES 15 SP4 | php8-test | 8.0.30-150400.4.76.2 | SUSE-SU-2026:4651-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | php8 +4 | 8.4.26-160000.1.1 | SUSE-SU-2026:24158-1 |
| SLES for SAP 15 SP6 | php7 +3 | 7.4.33-150400.4.81.1 | SUSE-SU-2026:4853-1 |
| SLES for SAP 15 SP6 | php8 +5 | 8.2.34-150600.3.36.1 | SUSE-SU-2026:4603-1 |
| SLES for SAP 15 SP5 | php7 +3 | 7.4.33-150400.4.81.1 | SUSE-SU-2026:4853-1 |
| SLES for SAP 15 SP5 | php8 +4 | 8.0.30-150400.4.76.1 | SUSE-SU-2026:4651-1 |
| SLES for SAP 15 SP5 | php8-test | 8.0.30-150400.4.76.2 | SUSE-SU-2026:4651-1 |
| SLES for SAP 15 SP4 | php7 +3 | 7.4.33-150400.4.81.1 | SUSE-SU-2026:4853-1 |
| SLES for SAP 15 SP4 | php8 +4 | 8.0.30-150400.4.76.1 | SUSE-SU-2026:4651-1 |
| SLES for SAP 15 SP4 | php8-test | 8.0.30-150400.4.76.2 | SUSE-SU-2026:4651-1 |
| SLES 16.0 | php8 +4 | 8.4.26-160000.1.1 | SUSE-SU-2026:24158-1 |
| SLE HPC 15 SP5 | php8 +4 | 8.0.30-150400.4.76.1 | SUSE-SU-2026:4651-1 |
| SLE HPC 15 SP5 | php8-test | 8.0.30-150400.4.76.2 | SUSE-SU-2026:4651-1 |
| SLE HPC 15 SP4 | php7 +3 | 7.4.33-150400.4.81.1 | SUSE-SU-2026:4853-1 |
| SLE HPC 15 SP4 | php8 +4 | 8.0.30-150400.4.76.1 | SUSE-SU-2026:4651-1 |
| SLE HPC 15 SP4 | php8-test | 8.0.30-150400.4.76.2 | SUSE-SU-2026:4651-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | php8 | 8.5.11-1.1 | openSUSE-SU-2026:11901-1 |
| openSUSE Leap 16.0 | php8 +5 | 8.4.26-160000.1.1 | openSUSE-SU-2026:22045-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | php83 | 8.3.35-r0 | — |
| Alpine v3.24 | php84 | 8.4.26-r0 | — |
| Alpine v3.24 | php85 | 8.5.11-r0 | — |
| Alpine v3.23 | php83 | 8.3.36-r0 | — |
| Alpine v3.23 | php84 | 8.4.27-r0 | — |
| Alpine v3.23 | php85 | 8.5.12-r0 | — |
| Alpine v3.22 | php82 | 8.2.35-r0 | — |
| Alpine v3.22 | php83 | 8.3.36-r0 | — |
| Alpine v3.22 | php84 | 8.4.27-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | php8.2 +27 | 8.2.34-1.amzn2023.0.1 | ALAS2023-2026-3161 |
| Amazon Linux 2023 | php8.3 +28 | 8.3.35-1.amzn2023.0.1 | ALAS2023-2026-3162 |
| Amazon Linux 2023 | php8.4 +27 | 8.4.26-1.amzn2023.0.1 | ALAS2023-2026-3163 |
| Amazon Linux 2023 | php8.5 +26 | 8.5.11-1.amzn2023.0.1 | ALAS2023-2026-3164 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | php | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | apcu-panel +2 | 5.1.18-1.module+el8.10.0+90472+f810484b | ELSA-2026-87080 |
| Oracle Linux 8 | libzip +2 | 1.6.1-1.module+el8.10.0+90472+f810484b | ELSA-2026-87080 |
| Oracle Linux 8 | php +25 | 7.4.33-8.module+el8.10.0+91080+9785160d | ELSA-2026-87080 |
| Oracle Linux 8 | php-pear | 1:1.10.13-1.module+el8.10.0+90472+f810484b | ELSA-2026-87080 |
| Oracle Linux 8 | php-pecl-rrd | 2.0.1-1.module+el8.10.0+90472+f810484b | ELSA-2026-87080 |
| Oracle Linux 8 | php-pecl-xdebug | 2.9.5-1.module+el8.10.0+90472+f810484b | ELSA-2026-87080 |
| Oracle Linux 8 | php-pecl-zip | 1.18.2-1.module+el8.10.0+90472+f810484b | ELSA-2026-87080 |
Advisories 17
- WID-SEC-2026-3585 PHP: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- ALSA-2026:87080 Important: php:7.4 security update AlmaLinux Security Advisories · Oct 29, 2026
- USN-8936-1 php8.5, php8.3, php8.1, php7.4, php7.2, php7.0, php5 vulnerabilities Ubuntu Security Notices (USN) · Oct 28, 2026
- SUSE-SU-2026:4853-1 Security update for php7 SUSE / openSUSE Security Updates · Oct 22, 2026
- RLSA-2026:87080 Important: php:7.4 security update Rocky Linux Security Advisories · Oct 22, 2026
- ELSA-2026-87080 Important: php:7.4 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 21, 2026
- openSUSE-SU-2026:22045-1 Security update for php8 SUSE / openSUSE Security Updates · Oct 19, 2026
- SUSE-SU-2026:24158-1 Security update for php8 SUSE / openSUSE Security Updates · Oct 16, 2026
- RHSA-2026:70720 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- SUSE-SU-2026:4651-1 Security update for php8 SUSE / openSUSE Security Updates · Oct 14, 2026
- ALAS2023-2026-3164 Important: php8.5 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 12, 2026
- ALAS2023-2026-3161 Important: php8.2 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 12, 2026
- ALAS2023-2026-3162 Important: php8.3 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 12, 2026
- ALAS2023-2026-3163 Important: php8.4 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 12, 2026
- SUSE-SU-2026:4602-1 Security update for php8 SUSE / openSUSE Security Updates · Oct 9, 2026
- SUSE-SU-2026:4603-1 Security update for php8 SUSE / openSUSE Security Updates · Oct 9, 2026
- openSUSE-SU-2026:11901-1 php8-8.5.11-1.1 on GA media SUSE / openSUSE Security Updates · Sep 29, 2026