DSA-6401-1 samba - security update
Several vulnerabilities have been discovered in Samba, a SMB/CIFS file, print, and login server for Unix, which might result in denial of service, domain takeover, information disclosure or privilege escalation. https://security-tracker.debian.org/tracker/DSA-6401-1
CSIRTS triage
- What
- Multiple vulnerabilities in Samba could lead to denial of service, domain takeover, information disclosure, or privilege escalation.
- Who is affected
- Users of Samba installations.
- Urgency
- Immediate remediation is recommended due to the potential for severe impacts from the vulnerabilities.
- Action
- Users should apply the security update provided in the advisory.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://lists.debian.org/debian-security-announce/2026/msg00312.html
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-582160.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all scored CVEs.
- Moderate exploitation riskCVE-2026-582181.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 62% of all scored CVEs.
- Low exploitation riskCVE-2026-582220.84% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 54% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-6949 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-58216 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-58218 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-58221 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-58222 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-58224 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[NEW] [high] Samba: Multiple vulnerabilitiescert-bund
- highCVE-2026-58222: A security flaw combining LDAP filter injection and improper authorization checks was found in…nvd
- mediumCVE-2026-58216: An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) passw…nvd
- mediumCVE-2026-58218: A flaw was found in Samba's internal DNS server where unauthenticated TKEY registration reques…nvd
- unknownUSN-8621-1: Samba vulnerabilitiesubuntu
- unknownMultiple vulnerabilities in Samba (July 28, 2026)cert-fr-avis
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