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USN-8338-2: Apache HTTP Server regression

Ubuntu Security Advisories
5 days 20 hours ago
USN-8338-1 fixed vulnerabilities in Apache HTTP Server. The update introduced a regression that prevented mod_http2 from loading on Ubuntu 18.04 LTS. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that Apache HTTP Server incorrectly handled certain response headers. An attacker could possibly use this issue to perform HTTP response splitting attacks. This issue only affected Ubuntu 14.04 LTS. (CVE-2023-38709) Will Dormann and David Warren discovered that Apache HTTP Server's HTTP/2 implementation did not properly reclaim memory when streams were reset by clients. A remote attacker could possibly use this issue to cause Apache HTTP Server to consume resources, leading to a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2023-45802) Keran Mu and Jianjun Chen discovered that Apache HTTP Server incorrectly handled certain response headers. An attacker could possibly use this issue to perform HTTP response splitting attacks. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-24795) Orange Tsai discovered that Apache HTTP Server mod_proxy incorrectly handled URL encoding. A remote attacker could possibly use this issue to bypass authentication via crafted requests. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2024-38473) Orange Tsai discovered that Apache HTTP Server could be caused to perform server-side request forgery (SSRF) via malicious backend response headers. A remote attacker could possibly use this issue to conduct SSRF attacks or disclose sensitive information. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-38476) Orange Tsai discovered that Apache HTTP Server mod_proxy did not properly handle certain null pointer conditions. A remote attacker could possibly use this issue to cause Apache HTTP Server to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-38477) Orange Tsai discovered that Apache HTTP Server mod_rewrite could be made to perform server-side request forgery (SSRF) via unsafe RewriteRules. A remote attacker could possibly use this issue to conduct SSRF attacks. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2024-39573) It was discovered that Apache HTTP Server incorrectly handled certain response headers. An attacker could possibly use this issue to perform HTTP response splitting attacks. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-42516) It was discovered that Apache HTTP Server could be caused to perform server-side request forgery (SSRF) via mod_headers modifying Content-Type headers. A remote attacker could possibly use this issue to conduct SSRF attacks. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-43204) John Runyon discovered that Apache HTTP Server mod_ssl did not properly escape user-supplied data before writing log entries. A remote attacker could possibly use this issue to insert escape sequences into log files. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-47252) Robert Merget discovered that Apache HTTP Server with SSLEngine optional was vulnerable to HTTP desynchronisation attacks. An attacker in a privileged network position could possibly use this issue to hijack HTTP sessions. This issue only affected Ubuntu 14.04 LTS. (CVE-2025-49812) It was discovered that Apache HTTP Server mod_md had an integer overflow in the ACME certificate renewal backoff timer. An attacker could possibly use this issue to cause excessive certificate renewal requests. This issue only affected Ubuntu 20.04 LTS. (CVE-2025-55753) Anthony Parfenov discovered that Apache HTTP Server with SSI enabled and mod_cgid passed shell-escaped query strings to #exec cmd directives. A remote attacker could possibly use this issue to perform command injection. (CVE-2025-58098) Mattias Åsander discovered that Apache HTTP Server incorrectly gave precedence to environment variables from HTTP headers over server-calculated CGI variables. A remote attacker could possibly use this issue to influence the environment of CGI programs. (CVE-2025-65082) Mattias Åsander discovered that Apache HTTP Server mod_userdir with suexec could be caused to run CGI scripts under an unexpected user ID via RequestHeader directives in .htaccess files. An attacker with .htaccess write access could possibly use this issue to bypass suexec user restrictions. (CVE-2025-66200)

freeipa-4.13.1-7.fc43 samba-4.23.8-1.fc43

Fedora Security Advisories
5 days 21 hours ago
FEDORA-2026-fc81581a79 Packages in this update:
  • freeipa-4.13.1-7.fc43
  • samba-4.23.8-1.fc43
Update description:

Update to Samba 4.23.8 - Security fix for CVE-2026-4480, CVE-2026-2340, CVE-2026-3012, CVE-2026-1933, CVE-2026-4408, and CVE-2026-3238

USN-8347-1: QT WebEngine vulnerability

Ubuntu Security Advisories
6 days 8 hours ago
It was discovered that the vendored LibTIFF in QT WebEngine incorrectly handled memory when parsing malformed TIFF image metadata. An attacker could possibly use this issue to cause a denial of service, obtain sensitive information, or execute arbitrary code.

USN-8346-1: Texmaker vulnerabilities

Ubuntu Security Advisories
6 days 8 hours ago
It was discovered that the vendored LibTIFF in Texmaker incorrectly handled memory when parsing malformed TIFF image metadata. An attacker could possibly use this issue to cause a denial of service, obtain sensitive information, or execute arbitrary code.

USN-8345-1: GDAL vulnerability

Ubuntu Security Advisories
6 days 8 hours ago
It was discovered that the vendored LibTIFF in GDAL incorrectly handled memory when parsing malformed TIFF image metadata. An attacker could possibly use this issue to cause a denial of service, obtain sensitive information, or execute arbitrary code.

libre-4.8.1-1.el10_3

Fedora Security Advisories
6 days 9 hours ago
FEDORA-EPEL-2026-39d9295352 Packages in this update:
  • libre-4.8.1-1.el10_3
Update description: libre v4.8.1 (2026-05-28)

libre-4.8.1-1.fc43

Fedora Security Advisories
6 days 9 hours ago
FEDORA-2026-bfba5a213d Packages in this update:
  • libre-4.8.1-1.fc43
Update description: libre v4.8.1 (2026-05-28)

libre-4.8.1-1.el9

Fedora Security Advisories
6 days 9 hours ago
FEDORA-EPEL-2026-e3f844d4d5 Packages in this update:
  • libre-4.8.1-1.el9
Update description: libre v4.8.1 (2026-05-28)