Description
Use After Free vulnerability in Apache HTTP Server's mod_http2 via shared session->bbtmp re-entrancy
This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server | 2.4.0 – ≤ 2.4.68 | — |
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 | apache2 | 2.4.69-1 | — |
| Debian 13 | apache2 | 2.4.69-1~deb13u1 | — |
| Debian 12 | apache2 | 2.4.71-1~deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | apache2 | 2.4.68-1ubuntu6.1 | USN-9016-1 |
| Ubuntu 26.04 LTS | apache2 | 2.4.66-2ubuntu2.5 | USN-9016-1, USN-8898-1 |
| Ubuntu 24.04 LTS | apache2 | 2.4.58-1ubuntu8.16 | USN-9016-1, USN-8898-1 |
| Ubuntu 22.04 LTS | apache2 | 2.4.52-1ubuntu4.24 | USN-9016-1, USN-8898-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | apache2 | 2.4.41-4ubuntu3.23+esm8 | USN-9016-1, USN-8898-1 |
| Ubuntu Pro 18.04 LTS | apache2 | 2.4.29-1ubuntu4.27+esm12 | USN-9016-1, USN-8898-1 |
| Ubuntu Pro 16.04 LTS | apache2 | 2.4.18-2ubuntu3.17+esm21 | USN-9016-1, USN-8898-1 |
| Ubuntu Pro 14.04 LTS | apache2 | 2.4.7-1ubuntu4.22+esm16 | USN-9016-1, USN-8898-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | httpd +10 | 2.4.69-1.hum1 | RHSA-2026:74858 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | mod_http2 | 2.0.29-5.el10_3.1 | RLSA-2026:98978 |
| Rocky Linux 9 | mod_http2 | 2.0.26-7.el9_9.1 | RLSA-2026:98981 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | apache2 +6 | 2.4.66-150700.4.26.1 | SUSE-SU-2026:5077-1 |
| SLES 15 SP6 | apache2 +5 | 2.4.66-150600.5.58.1 | SUSE-SU-2026:5075-1 |
| SLES 15 SP5 | apache2 | 2.4.66-150400.6.60.1 | SUSE-SU-2026:5076-1 |
| SLES 15 SP4 | apache2 | 2.4.66-150400.6.60.1 | SUSE-SU-2026:5076-1 |
| SLES 12 SP5 | apache2 +1 | 2.4.66-35.84.1 | SUSE-SU-2026:5099-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | apache2 +5 | 2.4.66-150600.5.58.1 | SUSE-SU-2026:5075-1 |
| SLES for SAP 15 SP5 | apache2 | 2.4.66-150400.6.60.1 | SUSE-SU-2026:5076-1 |
| SLES for SAP 15 SP4 | apache2 | 2.4.66-150400.6.60.1 | SUSE-SU-2026:5076-1 |
| SLE HPC 15 SP5 | apache2 | 2.4.66-150400.6.60.1 | SUSE-SU-2026:5076-1 |
| SLE HPC 15 SP4 | apache2 | 2.4.66-150400.6.60.1 | SUSE-SU-2026:5076-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | apache2 | 2.4.69-r0 | — |
| Alpine v3.23 | apache2 | 2.4.69-r0 | — |
| Alpine v3.22 | apache2 | 2.4.69-r0 | — |
| Alpine v3.21 | apache2 | 2.4.69-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | httpd +8 | 2.4.69-1.amzn2023.0.2 | ALAS2023-2026-3202 |
| Amazon Linux 2023 | mod_ssl +2 | 1:2.4.69-1.amzn2023.0.2 | ALAS2023-2026-3202 |
| Amazon Linux 2 | httpd +7 | 2.4.69-1.amzn2.0.3 | ALAS2-2026-3990 |
| Amazon Linux 2 | mod_ssl +2 | 1:2.4.69-1.amzn2.0.3 | ALAS2-2026-3990 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | httpd | 2.4.69-1 | — |
| Azure Linux 3 | mod_http2 | No fix yet | — |
Advisories 12
- RLSA-2026:98978 Important: mod_http2 security update Rocky Linux Security Advisories · Nov 13, 2026
- RLSA-2026:98981 Important: mod_http2 security update Rocky Linux Security Advisories · Nov 13, 2026
- WID-SEC-2026-3703 Apache HTTP Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- USN-9016-1 apache2 vulnerabilities Ubuntu Security Notices (USN) · Nov 11, 2026
- SUSE-SU-2026:5099-1 Security update for apache2 SUSE / openSUSE Security Updates · Nov 5, 2026
- SUSE-SU-2026:5075-1 Security update for apache2 SUSE / openSUSE Security Updates · Nov 3, 2026
- SUSE-SU-2026:5076-1 Security update for apache2 SUSE / openSUSE Security Updates · Nov 3, 2026
- SUSE-SU-2026:5077-1 Security update for apache2 SUSE / openSUSE Security Updates · Nov 3, 2026
- ALAS2023-2026-3202 Important: httpd security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 16, 2026
- ALAS2-2026-3990 Important: httpd security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 16, 2026
- RHSA-2026:74858 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- USN-8898-1 apache2 vulnerabilities Ubuntu Security Notices (USN) · Oct 9, 2026
References
- https://httpd.apache.org/security/vulnerabilities_24.html vendor-advisory