QSN-8955-1: nginx vulnerabilities
2026-10-26

Summary:
Several security issues were fixed in nginx.

Details:
It was discovered that nginx incorrectly handled certain configurations
using the alias directive together with rewrite rules. A remote attacker
could possibly use this issue to cause nginx to crash, resulting in a
denial of service, or execute arbitrary code.
(CVE-2026-15176)

It was discovered that nginx incorrectly handled map directives using
regex matching under certain circumstances. A remote attacker could
possibly use this issue to cause nginx to crash, resulting in a denial
of service, or execute arbitrary code.
(CVE-2026-93479)

It was discovered that nginx incorrectly handled HTTP/3 requests when
proxy_request_buffering was enabled. This issue only affected
Ubuntu 26.04 LTS and Ubuntu 26.10. A remote attacker could possibly use
this issue to inject data into proxied requests.
(CVE-2026-95101)

It was discovered that nginx incorrectly handled asynchronous file I/O
in certain configurations with Server Side Includes pages. A remote
attacker could possibly use this issue to cause nginx to crash,
resulting in a denial of service, or execute arbitrary code.
(CVE-2026-97205)

It was discovered that nginx incorrectly handled SSL session ticket keys
when configured with a shared session cache but without explicit ticket
key rotation. This issue only affected Ubuntu 24.04 LTS, Ubuntu 26.04 LTS,
and Ubuntu 26.10. A remote attacker
could possibly use this issue to forge client SSL sessions and bypass
client certificate verification.
(CVE-2026-97629)

Affected QuantaStor releases:
  6.9.1.001 jammy: libnginx-mod-http-echo 1.18.0-6ubuntu14.22 (fixed in 1.18.0-6ubuntu14.22)
  6.9.1.001 jammy: libnginx-mod-http-geoip2 1.18.0-6ubuntu14.22 (fixed in 1.18.0-6ubuntu14.22)
  6.9.1.001 jammy: nginx-common 1.18.0-6ubuntu14.22 (fixed in 1.18.0-6ubuntu14.22)
  6.9.1.001 jammy: nginx-light 1.18.0-6ubuntu14.22 (fixed in 1.18.0-6ubuntu14.22)
  6.9.0.464 jammy: libnginx-mod-http-echo 1.18.0-6ubuntu14.21 (fixed in 1.18.0-6ubuntu14.22)
  6.9.0.464 jammy: libnginx-mod-http-geoip2 1.18.0-6ubuntu14.21 (fixed in 1.18.0-6ubuntu14.22)
  6.9.0.464 jammy: nginx-common 1.18.0-6ubuntu14.21 (fixed in 1.18.0-6ubuntu14.22)
  6.9.0.464 jammy: nginx-light 1.18.0-6ubuntu14.21 (fixed in 1.18.0-6ubuntu14.22)
  6.8.6.015 jammy: libnginx-mod-http-echo 1.18.0-6ubuntu14.20 (fixed in 1.18.0-6ubuntu14.22)
  6.8.6.015 jammy: libnginx-mod-http-geoip2 1.18.0-6ubuntu14.20 (fixed in 1.18.0-6ubuntu14.22)
  6.8.6.015 jammy: nginx-common 1.18.0-6ubuntu14.20 (fixed in 1.18.0-6ubuntu14.22)
  6.8.6.015 jammy: nginx-light 1.18.0-6ubuntu14.20 (fixed in 1.18.0-6ubuntu14.22)
  6.8.5.018 jammy: libnginx-mod-http-echo 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.5.018 jammy: libnginx-mod-http-geoip2 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.5.018 jammy: nginx-common 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.5.018 jammy: nginx-light 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.4.038 jammy: libnginx-mod-http-echo 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.4.038 jammy: libnginx-mod-http-geoip2 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.4.038 jammy: nginx-common 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.4.038 jammy: nginx-light 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.3.018 jammy: libnginx-mod-http-echo 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.3.018 jammy: libnginx-mod-http-geoip2 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.3.018 jammy: nginx-common 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.3.018 jammy: nginx-light 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.2.002 jammy: libnginx-mod-http-echo 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.2.002 jammy: libnginx-mod-http-geoip2 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.2.002 jammy: nginx-common 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.2.002 jammy: nginx-light 1.18.0-6ubuntu14.18 (fixed in 1.18.0-6ubuntu14.22)
  6.8.1.007 jammy: libnginx-mod-http-echo 1.18.0-6ubuntu14.16 (fixed in 1.18.0-6ubuntu14.22)
  6.8.1.007 jammy: libnginx-mod-http-geoip2 1.18.0-6ubuntu14.16 (fixed in 1.18.0-6ubuntu14.22)
  6.8.1.007 jammy: nginx-common 1.18.0-6ubuntu14.16 (fixed in 1.18.0-6ubuntu14.22)
  6.8.1.007 jammy: nginx-light 1.18.0-6ubuntu14.16 (fixed in 1.18.0-6ubuntu14.22)
  6.8.0.205 jammy: libnginx-mod-http-echo 1.18.0-6ubuntu14.16 (fixed in 1.18.0-6ubuntu14.22)
  6.8.0.205 jammy: libnginx-mod-http-geoip2 1.18.0-6ubuntu14.16 (fixed in 1.18.0-6ubuntu14.22)
  6.8.0.205 jammy: nginx-common 1.18.0-6ubuntu14.16 (fixed in 1.18.0-6ubuntu14.22)
  6.8.0.205 jammy: nginx-light 1.18.0-6ubuntu14.16 (fixed in 1.18.0-6ubuntu14.22)

CVEs: CVE-2026-97205, CVE-2026-97629, CVE-2026-15176, CVE-2026-93479, CVE-2026-95101

References:
  https://ubuntu.com/security/notices/USN-8955-1