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

Answer in brief

CVE-2026-89636 records a Unknown severity vulnerability in smb: client: clear ce->tgthint in free_tgts(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=54be1f6c1c37498bba557049df646cc239fa37e3 <7507bd1885643d0461a6017767492450af1ce2a3 \|\| >=54be1f6c1c37498bba557049df646cc239fa37e3 <9ab46a13798a61d9d020b01d4e57efdabe6624fa \|\| >=54be1f6c1c37498bba557049df646cc239fa37e3 <5baab40404a9393bcc0b7b8f1950bf2c307e0984 \|\| >=54be1f6c1c37498bba557049df646cc239fa37e3 <b1b741cf8e7ce1b91d937e23decd3d3358748700	7507bd1885643d0461a6017767492450af1ce2a3, 9ab46a13798a61d9d020b01d4e57efdabe6624fa, 5baab40404a9393bcc0b7b8f1950bf2c307e0984, b1b741cf8e7ce1b91d937e23decd3d3358748700
Linux/Linuxgeneric	5.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 7507bd1885643d0461a6017767492450af1ce2a3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.