Description
A memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes.
Users are recommended to upgrade to version 2.4.69, which fixes this issue
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server | ≤ 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 | 2.4.68-1ubuntu6.2 | USN-9090-1 |
| Ubuntu 26.04 LTS | apache2 | 2.4.66-2ubuntu2.8 | USN-9090-1 |
| Ubuntu 24.04 LTS | apache2 | 2.4.58-1ubuntu8.19 | USN-9090-1 |
| Ubuntu 22.04 LTS | apache2 | 2.4.52-1ubuntu4.27 | USN-9090-1 |
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+esm11 | USN-9090-1 |
| Ubuntu Pro 18.04 LTS | apache2 | 2.4.29-1ubuntu4.27+esm15 | USN-9090-1 |
| Ubuntu Pro 16.04 LTS | apache2 | 2.4.18-2ubuntu3.17+esm24 | USN-9090-1 |
| Ubuntu Pro 14.04 LTS | apache2 | 2.4.7-1ubuntu4.22+esm19 | USN-9090-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | httpd +10 | 2.4.69-1.hum1 | RHSA-2026:74858 |
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 | — |
Advisories 9
- USN-9090-1 apache2 vulnerabilities Ubuntu Security Notices (USN) · Nov 13, 2026
- WID-SEC-2026-3703 Apache HTTP Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 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
- ALAS2-2026-3990 Important: httpd security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 16, 2026
- ALAS2023-2026-3202 Important: httpd security update (Amazon Linux 2023) 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
References
- https://httpd.apache.org/security/vulnerabilities_24.html vendor-advisory