Bug 2532294 (CVE-2026-89636) - CVE-2026-89636 kernel: smb: client: clear ce->tgthint in free_tgts()
Summary: CVE-2026-89636 kernel: smb: client: clear ce->tgthint in free_tgts()
Keywords:
Status: NEW
Alias: CVE-2026-89636
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-11 22:11 UTC by OSIDB Bzimport
Modified: 2026-09-18 20:17 UTC (History)
17 users (show)

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


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Description OSIDB Bzimport 2026-09-11 22:11:07 UTC
In the Linux kernel, the following vulnerability has been resolved:

smb: client: clear ce->tgthint in free_tgts()

When free_tgts() frees all structures in ce->tlist, ce->tgthint
is left pointing to one of the freed cache_dfs_tgt structures.

If ce->tgthint is not reset before it is used later, it results
in a use-after-free.

Set ce->tgthint to NULL in free_tgts() after the elements are
freed to reflect that no elements remain.


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