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CVE-2026-15779

MEDIUM
6.1
CVSS 3.1
Description
A flaw was found in samba's pam_winbind. When mkhomedir is enabled, pam_winbind chowns the target account's home directory without validating the path is not a critical system directory such as /. On affected systems, accounts with / as their home directory (a common default for system accounts) can have this triggered not only by root, but by a non-root user holding a narrow sudo delegation to run commands as that account, causing ownership of / to change and resulting in severe denial of service (SSH, sudo, and package-manager failures). The change does not grant write access to / (which ships with restrictive 0555 permissions on RHEL), so the impact is availability loss rather than further privilege escalation.

Metadata

CVE ID
CVE-2026-15779
State
PUBLISHED
Assigner
redhat
Reserved
2026-07-14 18:33 UTC
Published
2026-07-15 12:33 UTC
Last updated
2026-07-15 13:04 UTC
Primary CWE
CWE-732
Incorrect Permission Assignment for Critical Resource
Vendor / Product
Red Hat / Red Hat Enterprise Linux 10
Sources
cve.org  ·  NVD

Severity & Metrics

6.1 MEDIUM CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (5)
VendorProductPlatformVersions
Red Hat Red Hat Enterprise Linux 10 — —
Red Hat Red Hat Enterprise Linux 6 — —
Red Hat Red Hat Enterprise Linux 7 — —
Red Hat Red Hat Enterprise Linux 8 — —
Red Hat Red Hat Enterprise Linux 9 — —
Weakness (CWE)
CWESourceDescription
CWE-732 cna Incorrect Permission Assignment for Critical Resource
CVSS scores (1)
ScoreSeverityVersionSourceVector
6.1 MEDIUM 3.1 cna CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
References (5)
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