CVE-2025-53020
Apache HTTP Server: HTTP/2 DoS by Memory Increase
CVE-2025-53020 is fixed in 35 products on 1 platform, first by apache2 2.4.29-1ubuntu4.27+esm6, released July 10, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
8.2
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0496
92nd percentile
Late Release of Memory after Effective Lifetime vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: from 2.4.17 up to 2.4.63. Users are recommended to upgrade to version 2.4.64, which fixes the issue.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| apache2 · Debian 12.15 (bookworm) | 2.4.65-1~deb12u1 | DEBIAN-CVE-2025-53020 | Jul 10, 2025 |
| apache2 · Debian 13.5 (trixie) | 2.4.64-1 | DEBIAN-CVE-2025-53020 | Jul 10, 2025 |
| apache2 · Debian 14 | 2.4.64-1 | DEBIAN-CVE-2025-53020 | Jul 10, 2025 |
| apache2 · Ubuntu 18.04.6 LTS (bionic) | 2.4.29-1ubuntu4.27+esm6 | apache2 2.4.29-1ubuntu4.27+esm6 | Jul 10, 2025 |
| apache2 · Ubuntu 20.04 LTS (focal) | 2.4.41-4ubuntu3.23+esm2 | apache2 2.4.41-4ubuntu3.23+esm2 | Jul 10, 2025 |
| apache2 · Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.15 | apache2 2.4.52-1ubuntu4.15 | Jul 10, 2025 |
| apache2 · Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.7 | apache2 2.4.58-1ubuntu8.7 | Jul 10, 2025 |
| apache2 · Ubuntu 25.04 (plucky) | 2.4.63-1ubuntu1.1 | apache2 2.4.63-1ubuntu1.1 | Jan 16, 2026 |
| apache2 · opensuse-leap 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2 · sles 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2 · sles 15.7 | 2.4.62-150700.4.3.1 | SUSE-SU-2025:02685-1 | Aug 4, 2025 |
| apache2-bin · Ubuntu 18.04.6 LTS (bionic) | 2.4.29-1ubuntu4.27+esm6 | apache2-bin 2.4.29-1ubuntu4.27+esm6 | Jul 10, 2025 |
| apache2-bin · Ubuntu 20.04 LTS (focal) | 2.4.41-4ubuntu3.23+esm2 | apache2-bin 2.4.41-4ubuntu3.23+esm2 | Jul 10, 2025 |
| apache2-bin · Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.15 | apache2-bin 2.4.52-1ubuntu4.15 | Jul 10, 2025 |
| apache2-bin · Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.7 | apache2-bin 2.4.58-1ubuntu8.7 | Jul 10, 2025 |
| apache2-bin · Ubuntu 25.04 (plucky) | 2.4.63-1ubuntu1.1 | apache2-bin 2.4.63-1ubuntu1.1 | Jan 16, 2026 |
| apache2-data · Ubuntu 18.04.6 LTS (bionic) | 2.4.29-1ubuntu4.27+esm6 | apache2-data 2.4.29-1ubuntu4.27+esm6 | Jul 10, 2025 |
| apache2-data · Ubuntu 20.04 LTS (focal) | 2.4.41-4ubuntu3.23+esm2 | apache2-data 2.4.41-4ubuntu3.23+esm2 | Jul 10, 2025 |
| apache2-data · Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.15 | apache2-data 2.4.52-1ubuntu4.15 | Jul 10, 2025 |
| apache2-data · Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.7 | apache2-data 2.4.58-1ubuntu8.7 | Jul 10, 2025 |
| apache2-data · Ubuntu 25.04 (plucky) | 2.4.63-1ubuntu1.1 | apache2-data 2.4.63-1ubuntu1.1 | Jan 16, 2026 |
| apache2-devel · opensuse-leap 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2-devel · sles 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2-devel · sles 15.7 | 2.4.62-150700.4.3.1 | SUSE-SU-2025:02685-1 | Aug 4, 2025 |
| apache2-event · opensuse-leap 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2-event · sles 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2-event · sles 15.7 | 2.4.62-150700.4.3.1 | SUSE-SU-2025:02685-1 | Aug 4, 2025 |
| apache2-manual · opensuse-leap 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2-prefork · opensuse-leap 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2-prefork · sles 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2-prefork · sles 15.7 | 2.4.62-150700.4.3.1 | SUSE-SU-2025:02685-1 | Aug 4, 2025 |
| apache2-suexec-custom · Ubuntu 18.04.6 LTS (bionic) | 2.4.29-1ubuntu4.27+esm6 | apache2-suexec-custom 2.4.29-1ubuntu4.27+esm6 | Jul 10, 2025 |
| apache2-suexec-custom · Ubuntu 20.04 LTS (focal) | 2.4.41-4ubuntu3.23+esm2 | apache2-suexec-custom 2.4.41-4ubuntu3.23+esm2 | Jul 10, 2025 |
| apache2-suexec-custom · Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.15 | apache2-suexec-custom 2.4.52-1ubuntu4.15 | Jul 10, 2025 |
| apache2-suexec-custom · Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.7 | apache2-suexec-custom 2.4.58-1ubuntu8.7 | Jul 10, 2025 |
| apache2-suexec-custom · Ubuntu 25.04 (plucky) | 2.4.63-1ubuntu1.1 | apache2-suexec-custom 2.4.63-1ubuntu1.1 | Jan 16, 2026 |
| apache2-suexec-pristine · Ubuntu 18.04.6 LTS (bionic) | 2.4.29-1ubuntu4.27+esm6 | apache2-suexec-pristine 2.4.29-1ubuntu4.27+esm6 | Jul 10, 2025 |
| apache2-suexec-pristine · Ubuntu 20.04 LTS (focal) | 2.4.41-4ubuntu3.23+esm2 | apache2-suexec-pristine 2.4.41-4ubuntu3.23+esm2 | Jul 10, 2025 |
| apache2-suexec-pristine · Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.15 | apache2-suexec-pristine 2.4.52-1ubuntu4.15 | Jul 10, 2025 |
| apache2-suexec-pristine · Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.7 | apache2-suexec-pristine 2.4.58-1ubuntu8.7 | Jul 10, 2025 |
| apache2-suexec-pristine · Ubuntu 25.04 (plucky) | 2.4.63-1ubuntu1.1 | apache2-suexec-pristine 2.4.63-1ubuntu1.1 | Jan 16, 2026 |
| apache2-utils · Ubuntu 18.04.6 LTS (bionic) | 2.4.29-1ubuntu4.27+esm6 | apache2-utils 2.4.29-1ubuntu4.27+esm6 | Jul 10, 2025 |
| apache2-utils · Ubuntu 20.04 LTS (focal) | 2.4.41-4ubuntu3.23+esm2 | apache2-utils 2.4.41-4ubuntu3.23+esm2 | Jul 10, 2025 |
| apache2-utils · Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.15 | apache2-utils 2.4.52-1ubuntu4.15 | Jul 10, 2025 |
| apache2-utils · Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.7 | apache2-utils 2.4.58-1ubuntu8.7 | Jul 10, 2025 |
| apache2-utils · Ubuntu 25.04 (plucky) | 2.4.63-1ubuntu1.1 | apache2-utils 2.4.63-1ubuntu1.1 | Jan 16, 2026 |
| apache2-utils · opensuse-leap 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2-utils · sles 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2-utils · sles 15.7 | 2.4.62-150700.4.3.1 | SUSE-SU-2025:02685-1 | Aug 4, 2025 |
| apache2-worker · opensuse-leap 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2-worker · sles 15.6 | 2.4.58-150600.5.35.1 | SUSE-SU-2025:02684-1 | Aug 4, 2025 |
| apache2-worker · sles 15.7 | 2.4.62-150700.4.3.1 | SUSE-SU-2025:02685-1 | Aug 4, 2025 |
| httpd · RHEL 8 | 0:2.4.37-65.module+el8.10.0+24281+ea10630c.8 | RHSA-2026:22140 | Jun 24, 2026 |
| httpd · almalinux 8 | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 | Jun 1, 2026 |
| httpd · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| httpd · ol 8 | 0:2.4.37-65.0.1.module+el8.10.0+90899+db89cbcc.7 | ELSA-2026-22140 | Jun 1, 2026 |
| httpd · rocky 8 | 0:2.4.37-65.module+el8.10.0+2061+8d03fdec.5 | RLSA-2026:22140 | Jun 1, 2026 |
| httpd-core · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| httpd-core-debuginfo · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| httpd-debuginfo · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| httpd-debugsource · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| httpd-devel · RHEL 8 | 0:2.4.37-65.module+el8.10.0+24281+ea10630c.8 | RHSA-2026:22140 | Jun 24, 2026 |
| httpd-devel · almalinux 8 | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 | Jun 1, 2026 |
| httpd-devel · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| httpd-devel · ol 8 | 0:2.4.37-65.0.1.module+el8.10.0+90899+db89cbcc.7 | ELSA-2026-22140 | Jun 1, 2026 |
| httpd-filesystem · RHEL 8 | 0:2.4.37-65.module+el8.10.0+24281+ea10630c.8 | RHSA-2026:22140 | Jun 24, 2026 |
| httpd-filesystem · almalinux 8 | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 | Jun 1, 2026 |
| httpd-filesystem · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| httpd-filesystem · ol 8 | 0:2.4.37-65.0.1.module+el8.10.0+90899+db89cbcc.7 | ELSA-2026-22140 | Jun 1, 2026 |
| httpd-manual · RHEL 8 | 0:2.4.37-65.module+el8.10.0+24281+ea10630c.8 | RHSA-2026:22140 | Jun 24, 2026 |
| httpd-manual · almalinux 8 | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 | Jun 1, 2026 |
| httpd-manual · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| httpd-manual · ol 8 | 0:2.4.37-65.0.1.module+el8.10.0+90899+db89cbcc.7 | ELSA-2026-22140 | Jun 1, 2026 |
| httpd-tools · RHEL 8 | 0:2.4.37-65.module+el8.10.0+24281+ea10630c.8 | RHSA-2026:22140 | Jun 24, 2026 |
| httpd-tools · almalinux 8 | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 | Jun 1, 2026 |
| httpd-tools · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| httpd-tools · ol 8 | 0:2.4.37-65.0.1.module+el8.10.0+90899+db89cbcc.7 | ELSA-2026-22140 | Jun 1, 2026 |
| httpd-tools-debuginfo · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| libapache2-mod-md · Ubuntu 20.04 LTS (focal) | 2.4.41-4ubuntu3.23+esm2 | libapache2-mod-md 2.4.41-4ubuntu3.23+esm2 | Jul 10, 2025 |
| libapache2-mod-md · Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.15 | libapache2-mod-md 2.4.52-1ubuntu4.15 | Jul 10, 2025 |
| libapache2-mod-md · Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.7 | libapache2-mod-md 2.4.58-1ubuntu8.7 | Jul 10, 2025 |
| libapache2-mod-proxy-uwsgi · Ubuntu 20.04 LTS (focal) | 2.4.41-4ubuntu3.23+esm2 | libapache2-mod-proxy-uwsgi 2.4.41-4ubuntu3.23+esm2 | Jul 10, 2025 |
| libapache2-mod-proxy-uwsgi · Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.15 | libapache2-mod-proxy-uwsgi 2.4.52-1ubuntu4.15 | Jul 10, 2025 |
| libapache2-mod-proxy-uwsgi · Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.7 | libapache2-mod-proxy-uwsgi 2.4.58-1ubuntu8.7 | Jul 10, 2025 |
| mod_http2 · RHEL 10 | 2.0.29-2.el10_0.2 | RHSA-2026:50538 | Jun 24, 2026 |
| mod_http2 · RHEL 8 | 0:1.15.7-10.module+el8.10.0+24315+35fe59d0.5 | RHSA-2026:22140 | Jun 24, 2026 |
| mod_http2 · RHEL 9 | 0:2.0.26-6.el9_8 | RHSA-2026:22551 | Jun 24, 2026 |
| mod_http2 · almalinux 10 | 2.0.29-4.el10_2 | ALSA-2026:22528 | Jun 2, 2026 |
| mod_http2 · almalinux 8 | 1.15.7-10.module_el8.10.0+4185+0955a0d7.5 | ALSA-2026:22140 | Jun 1, 2026 |
| mod_http2 · almalinux 9 | 2.0.26-6.el9_8 | ALSA-2026:22551 | Jun 2, 2026 |
| mod_http2 · ol 10 | 0:2.0.29-4.el10_2.2 | ELSA-2026-22528 | Jul 17, 2026 |
| mod_http2 · ol 8 | 0:1.15.7-10.module+el8.10.0+90899+db89cbcc.5 | ELSA-2026-22140 | Jun 1, 2026 |
| mod_http2 · ol 9 | 0:2.0.26-6.el9_8.1 | ELSA-2026-22551 | Jun 26, 2026 |
| mod_http2 · rocky 10 | 0:2.0.29-4.el10_2 | RLSA-2026:22528 | Jun 5, 2026 |
| mod_http2 · rocky 8 | 0:1.15.7-10.module+el8.10.0+1775+6b057638 | RLSA-2026:22140 | Jun 1, 2026 |
| mod_http2 · rocky 9 | 0:2.0.26-6.el9_8 | RLSA-2026:22551 | Jun 5, 2026 |
| mod_ldap · RHEL 8 | 0:2.4.37-65.module+el8.10.0+24281+ea10630c.8 | RHSA-2026:22140 | Jun 24, 2026 |
| mod_ldap · almalinux 8 | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 | Jun 1, 2026 |
| mod_ldap · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| mod_ldap · ol 8 | 0:2.4.37-65.0.1.module+el8.10.0+90899+db89cbcc.7 | ELSA-2026-22140 | Jun 1, 2026 |
| mod_ldap-debuginfo · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| mod_lua · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| mod_lua-debuginfo · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| mod_md · RHEL 8 | 1:2.0.8-8.module+el8.10.0+23815+1b5e1c66.2 | RHSA-2026:22140 | Jun 24, 2026 |
| mod_md · almalinux 8 | 1:2.0.8-8.module_el8.10.0+4088+57f011c1.2 | ALSA-2026:22140 | Jun 1, 2026 |
| mod_md · ol 8 | 1:2.0.8-8.module+el8.10.0+90899+db89cbcc.2 | ELSA-2026-22140 | Jun 1, 2026 |
| mod_md · rocky 8 | 1:2.0.8-8.module+el8.9.0+1370+89cc8ad5 | RLSA-2026:22140 | Jun 1, 2026 |
| mod_proxy_html · RHEL 8 | 1:2.4.37-65.module+el8.10.0+24281+ea10630c.8 | RHSA-2026:22140 | Jun 24, 2026 |
| mod_proxy_html · almalinux 8 | 1:2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 | Jun 1, 2026 |
| mod_proxy_html · amzn 2023 | 1:2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| mod_proxy_html · ol 8 | 1:2.4.37-65.0.1.module+el8.10.0+90899+db89cbcc.7 | ELSA-2026-22140 | Jun 1, 2026 |
| mod_proxy_html-debuginfo · amzn 2023 | 1:2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| mod_session · RHEL 8 | 0:2.4.37-65.module+el8.10.0+24281+ea10630c.8 | RHSA-2026:22140 | Jun 24, 2026 |
| mod_session · almalinux 8 | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 | Jun 1, 2026 |
| mod_session · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| mod_session · ol 8 | 0:2.4.37-65.0.1.module+el8.10.0+90899+db89cbcc.7 | ELSA-2026-22140 | Jun 1, 2026 |
| mod_session-debuginfo · amzn 2023 | 2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| mod_ssl · RHEL 8 | 1:2.4.37-65.module+el8.10.0+24281+ea10630c.8 | RHSA-2026:22140 | Jun 24, 2026 |
| mod_ssl · almalinux 8 | 1:2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 | Jun 1, 2026 |
| mod_ssl · amzn 2023 | 1:2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
| mod_ssl · ol 8 | 1:2.4.37-65.0.1.module+el8.10.0+90899+db89cbcc.7 | ELSA-2026-22140 | Jun 1, 2026 |
| mod_ssl-debuginfo · amzn 2023 | 1:2.4.64-1.amzn2023.0.1 | ALAS2023-2025-1125 | Jul 29, 2025 |
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