Description
Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0.
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 | 2.4.0 – ≤ 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 | 2.4.66-2ubuntu2.6 | USN-9016-1, USN-8931-1 |
| Ubuntu 24.04 LTS | apache2 | 2.4.58-1ubuntu8.17 | USN-9016-1, USN-8931-1 |
| Ubuntu 22.04 LTS | apache2 | 2.4.52-1ubuntu4.25 | USN-9016-1, USN-8931-1 |
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+esm9 | USN-9016-1, USN-8931-1 |
| Ubuntu Pro 18.04 LTS | apache2 | 2.4.29-1ubuntu4.27+esm13 | USN-9016-1, USN-8931-1 |
| Ubuntu Pro 16.04 LTS | apache2 | 2.4.18-2ubuntu3.17+esm22 | USN-9016-1, USN-8931-1 |
| Ubuntu Pro 14.04 LTS | apache2 | 2.4.7-1ubuntu4.22+esm17 | USN-9016-1, USN-8931-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | httpd +10 | 2.4.69-1.hum1 | RHSA-2026:74858 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | httpd +8 | 2.4.63-13.el10_2.8 | ALSA-2026:89860 |
| AlmaLinux 10 | mod_ssl +1 | 1:2.4.63-13.el10_2.8 | ALSA-2026:89860 |
| AlmaLinux 9 | httpd +8 | 2.4.62-13.el9_8.9 | ALSA-2026:88229 |
| AlmaLinux 9 | mod_ssl +1 | 1:2.4.62-13.el9_8.9 | ALSA-2026:88229 |
| AlmaLinux 8 | httpd +6 | 2.4.37-65.module_el8.10.0+4332+2bef2e0d.13 | ALSA-2026:92616 |
| AlmaLinux 8 | mod_http2 | 1.15.7-10.module_el8.10.0+4233+8b7d9181.7 | ALSA-2026:92616 |
| AlmaLinux 8 | mod_md | 1:2.0.8-8.module_el8.10.0+4295+280de5aa.4 | ALSA-2026:92616 |
| AlmaLinux 8 | mod_ssl +1 | 1:2.4.37-65.module_el8.10.0+4332+2bef2e0d.13 | ALSA-2026:92616 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | httpd | 2.4.63-13.el10_2.8 | RLSA-2026:89860 |
| Rocky Linux 9 | httpd | 2.4.62-13.el9_8.9 | RLSA-2026:88229 |
| Rocky Linux 8 | httpd | 2.4.37-65.module+el8.10.0+1830+22f0c9e0 | RLSA-2026:92616 |
| Rocky Linux 8 | mod_http2 | 1.15.7-10.module+el8.10.0+1775+6b057638 | RLSA-2026:92616 |
| Rocky Linux 8 | mod_md | 1:2.0.8-8.module+el8.9.0+1370+89cc8ad5 | RLSA-2026:92616 |
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 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | httpd +8 | 2.4.63-13.0.1.el10_2.8 | ELSA-2026-89860 |
| Oracle Linux 10 | mod_ssl +1 | 1:2.4.63-13.0.1.el10_2.8 | ELSA-2026-89860 |
| Oracle Linux 9 | httpd +8 | 2.4.62-13.0.1.el9_8.9 | ELSA-2026-88229 |
| Oracle Linux 9 | mod_ssl +1 | 1:2.4.62-13.0.1.el9_8.9 | ELSA-2026-88229 |
| Oracle Linux 8 | httpd +6 | 2.4.37-65.0.1.module+el8.10.0+91092+d4ec9ae3.8 | ELSA-2026-92616 |
| Oracle Linux 8 | mod_http2 | 1.15.7-10.module+el8.10.0+91023+3994037c.7 | ELSA-2026-92616 |
| Oracle Linux 8 | mod_md | 1:2.0.8-8.module+el8.10.0+91092+d4ec9ae3.4 | ELSA-2026-92616 |
| Oracle Linux 8 | mod_ssl +1 | 1:2.4.37-65.0.1.module+el8.10.0+91092+d4ec9ae3.8 | ELSA-2026-92616 |
Advisories 19
- 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
- RLSA-2026:92616 Important: httpd:2.4 security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 30, 2026
- ALSA-2026:92616 Important: httpd:2.4 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 30, 2026
- ELSA-2026-92616 Important: httpd:2.4 security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 30, 2026
- ALSA-2026:88229 Important: httpd security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:89860 Important: httpd security update AlmaLinux Security Advisories · Oct 29, 2026
- RLSA-2026:89860 Important: httpd security update Rocky Linux Security Advisories · Oct 27, 2026
- ELSA-2026-89860 Important: httpd security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Oct 26, 2026
- RLSA-2026:88229 Important: httpd security update Rocky Linux Security Advisories · Oct 23, 2026
- ELSA-2026-88229 Important: httpd security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 22, 2026
- USN-8931-1 apache2 vulnerabilities Ubuntu Security Notices (USN) · Oct 17, 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