CVE-2026-43239

HIGHNVD 8.88.8—

8.8

In the Linux kernel, the following vulnerability has been resolved:

smb: client: prevent races in ->query_interfaces()

It was possible for two query interface works to be concurrently trying to update the interfaces.

Prevent this by checking and updating iface_last_update under iface_lock.

CVSS v3: 8.8
EG Score: 8.8(high)
EPSS: 13.5%
KEV: Not listed

Published

May 6, 2026

Last Modified

May 12, 2026

Advisory Details (5)

Auto-updated May 12, 2026

No patch confirmed yet.

generic

smb: client: prevent races in ->query_interfaces() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c3c06e42e1527716c54f3ad2ced6a034b5f3a489

generic

smb: client: prevent races in ->query_interfaces() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ab6564f416a6eaf1199200b6100952407b438f7d

generic

smb: client: prevent races in ->query_interfaces() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/93e8e3ee165ae4609a1222b516b573837103d2c3

generic

smb: client: prevent races in ->query_interfaces() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/76cc4faba0343c6db945b8dc75425b33d633e1b8

generic

smb: client: prevent races in ->query_interfaces() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6287eefaf21ec805d42f941bd368018cf397a7f5

Data Freshness Timeline

(refreshed 12× in last 7d / 17× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-21 22:43 UTCepss_batch
2026-05-20 14:13 UTCEG score recompute
2026-05-20 14:13 UTCGHSA enrichment
2026-05-20 11:22 UTCepss_batch
2026-05-20 11:22 UTCepss_batch

Frequently asked(5)

What is CVE-2026-43239?

CVE-2026-43239 is a high vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: smb: client: prevent races in ->query_interfaces() It was possible for two query interface works to be concurrently trying to update the interfaces. Prevent this by checking and updating ifacelastupdate under iface_lock.

When was CVE-2026-43239 disclosed?

CVE-2026-43239 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-43239 actively exploited?

CVE-2026-43239 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-43239?

CVE-2026-43239 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2026-43239?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43239, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-43239

📅 Published

🔄 Last Modified

📋 Advisory Details (5)

smb: client: prevent races in ->query_interfaces() - kernel/git/stable/linux.git - Linux kernel stable tree

smb: client: prevent races in ->query_interfaces() - kernel/git/stable/linux.git - Linux kernel stable tree

smb: client: prevent races in ->query_interfaces() - kernel/git/stable/linux.git - Linux kernel stable tree

smb: client: prevent races in ->query_interfaces() - kernel/git/stable/linux.git - Linux kernel stable tree

smb: client: prevent races in ->query_interfaces() - kernel/git/stable/linux.git - Linux kernel stable tree

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-43239?

Published

Last Modified

Advisory Details (5)

Frequently asked(5)