Critical Samba Vulnerabilities Lead to Denial of Service Risks

Critical Samba Vulnerabilities Lead to Denial of Service Risks

First seen 28 Jul 2026, 15:16 UTC •UbuntuLinuxsecurity •94% similarity •70.5

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Multiple vulnerabilities in Samba have been identified, affecting various versions of the software. These include issues with pam_winbind, TSIG packets, and malformed ASN.1 kpasswd packets, which could lead to denial of service attacks. Local and remote attackers can exploit these vulnerabilities, potentially causing crashes or unauthorized modifications. The vulnerabilities are tracked under CVEs: CVE-2026-15779, CVE-2026-6949, CVE-2026-58216, CVE-2026-58218, and CVE-2026-58221. Affected systems include Ubuntu 26.04 LTS, 24.04 LTS, and 22.04 LTS. Users are advised to update their systems to mitigate these risks. The vulnerabilities were disclosed on July 15, 2026, and are now publicly known.

Key Points: • Samba vulnerabilities could lead to denial of service for local and remote attackers. • Key CVEs include CVE-2026-15779 and CVE-2026-6949, among others. • Users are urged to update their Samba installations to prevent exploitation.

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Timeline

2026-07-15
CVE-2026-15779 published
Vulnerability in Samba's pam_winbind allows local attackers to change root directory ownership, causing denial of service.
Ubuntu
2026-07-28
Samba vulnerabilities disclosed
Multiple vulnerabilities in Samba were reported, affecting various versions and allowing denial of service attacks.
Linuxsecurity
2026-07-28
Users advised to update Samba
Security notices recommend updating to patched versions to mitigate the risk of exploitation.
Linuxsecurity

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