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NVD / CVE Program· CNA Linux

CVE-2026-93210: smb: client: harden DFS cache against invalid target hints

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 66dbcdbb0cadffd12eb8f2b115fd57d384c5109d, 6cb7f9fed8f40f28fbd464ca99c946951afc0952, 7e32da6047d9afdae8dd17b87b4c8d97363c4ee2.

Low priority for now. Upgrade to Linux Linux 66dbcdbb0cadffd12eb8f2b115fd57d384c5109d, 6cb7f9fed8f40f28fbd464ca99c946951afc0952, 7e32da6047d9afdae8dd17b87b4c8d97363c4ee2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: smb: client: harden DFS cache against invalid target hints Currently, get_tgt_name() returns ERR_PTR(-ENOENT) when ce->tgthint is NULL, and dfs_cache_noreq_update_tgthint() assumes ce->tgthint is always valid. In preparation for clearing ce->tgthint in free_tgts(), harden callers of get_tgt_name() against ERR_PTR results and harden dfs_cache_noreq_update_tgthint() against NULL pointer dereferences.

—No exploit Fix available
Published
Sep 24, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.0affected
    • 54be1f6c1c37498bba557049df646cc239fa37e3 and later · before a48328afbc3f63e3b9de8827e2e16c15b17976f7affected · git
    • 54be1f6c1c37498bba557049df646cc239fa37e3 and later · before 6cb7f9fed8f40f28fbd464ca99c946951afc0952affected · git
    • 54be1f6c1c37498bba557049df646cc239fa37e3 and later · before 66dbcdbb0cadffd12eb8f2b115fd57d384c5109daffected · git
    • 54be1f6c1c37498bba557049df646cc239fa37e3 and later · before 846f0709559b9e27024e126a80bc7afb76516912affected · git
    • 54be1f6c1c37498bba557049df646cc239fa37e3 and later · before 7e32da6047d9afdae8dd17b87b4c8d97363c4ee2affected · git
    • 54be1f6c1c37498bba557049df646cc239fa37e3 and later · before bf86c08123c6ab8c61cc0be1dad7540db93738ffaffected · git
    • before 5.0not affected · semver
    • 6.1.188 and later · up to and including 6.1.*not affected · semver
    • 6.6.157 and later · up to and including 6.6.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-93208Sep 24, 2026 · kasan: fix cache shrink race with CPU hotplug
    0Monitor
  • ← EarlierCVE-2026-93209Sep 24, 2026 · Bluetooth: hci_core: use skb_get() instead of skb_clone() for req_skb
    0Monitor
  • Later →CVE-2026-93211Sep 24, 2026 · nfsd: initialize DRC hash table before registering shrinker
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux66dbcdbb0cadffd12eb8f2b115fd57d384c5109dVendor (CNA)
Linux Linux6cb7f9fed8f40f28fbd464ca99c946951afc0952Vendor (CNA)
Linux Linux7e32da6047d9afdae8dd17b87b4c8d97363c4ee2Vendor (CNA)
Linux Linux846f0709559b9e27024e126a80bc7afb76516912Vendor (CNA)
Linux Linuxa48328afbc3f63e3b9de8827e2e16c15b17976f7Vendor (CNA)
Linux Linuxbf86c08123c6ab8c61cc0be1dad7540db93738ffVendor (CNA)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records