Bug 2502728 (CVE-2026-58218) - CVE-2026-58218 samba: DNS signing DoS via TKEY name cache exhaustion
Summary: CVE-2026-58218 samba: DNS signing DoS via TKEY name cache exhaustion
Keywords:
Status: NEW
Alias: CVE-2026-58218
Deadline: 2026-07-28
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2509266
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-20 11:01 UTC by OSIDB Bzimport
Modified: 2026-07-30 12:53 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-07-20 11:01:19 UTC 
An unauthenticated user can repeatedly register names TKEY names, which floods a cache causing legitimate TKEYs to be expunged. This can practically block the use DNS TSIG signing.
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