CVE-2026-68343: smb: client: validate DFS referral PathConsumed

mediumCVSS 5.3CVE-2026-68343

CSIRTS triage

vendor: Linux product: Linux kernelOther

What: SMB client fails to validate the PathConsumed field in DFS referral responses, leading to potential buffer issues.
Who is affected: Linux systems with SMB client implementation that process DFS referrals.
Urgency: Medium severity; validation bypass could lead to denial of service or information disclosure.
Action: Apply the latest Linux kernel patch addressing CVE-2026-68343.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.3
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68343

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-683430.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-68343	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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