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CVE-2026-15779

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 servi
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:88da99db61a77745fee940431cfe606654e517dc8b3b163db96542b1165db971
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 5 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"affected","packageName":"samba-winbind","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"samba-winbind","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/affected/4

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"samba-winbind","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"samba-winbind","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"affected","packageName":"samba-winbind","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/affected/2

Affected products and versions

5 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"affected","packageName":"samba-winbind","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"samba-winbind","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"samba-winbind","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"samba-winbind","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"affected","packageName":"samba-winbind","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/affected/2

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-732","description":"Incorrect Permission Assignment for Critical Resource","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-15779"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/references/0
{"name":"RHBZ#2499991","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2499991"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/references/1
{"url":"https://gitlab.com/samba-team/samba/-/blob/samba-4.19.4/nsswitch/pam_winbind.c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/references/2
{"url":"https://gitlab.com/samba-team/samba/-/blob/samba-4.23.5/nsswitch/pam_winbind.c#L1622"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/references/3
{"url":"https://gitlab.com/samba-team/samba/-/blob/samba-4.24.3/nsswitch/pam_winbind.c#L1590"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bfad2ba2b70346c08c9d2e4e7bca669f269c5f797c712de298131188201837bd · sha256:c594f2b90fa2d4b0… · /containers/cna/references/4

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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