CVE-2016-2126

medium

Published 2017-05-11 · Modified 2026-05-13

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CVSS v3

6.5

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

6.5

Description

Samba version 4.0.0 up to 4.5.2 is vulnerable to privilege elevation due to incorrect handling of the PAC (Privilege Attribute Certificate) checksum. A remote, authenticated, attacker can cause the winbindd process to crash using a legitimate Kerberos ticket. A local service with access to the winbindd privileged pipe can cause winbindd to cache elevated access permissions.

Predictions

Exploit likelihood

75%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Arch Fixed 1 release

Version	Status	Fixed in
—	Fixed	`4.5.3-1`

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`2:4.5.2+dfsg-2`
sid	Fixed	`2:4.5.2+dfsg-2`
forky	Fixed	`2:4.5.2+dfsg-2`
bullseye	Fixed	`2:4.5.2+dfsg-2`
bookworm	Fixed	`2:4.5.2+dfsg-2`

Application impact

Vendor	Product	Versions	Fixed
samba	samba	`{"startIncluding":"4.0.0","endExcluding":"4.3.13"}`	`4.3.13`

References

CWEs

CWE-264

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.