Vulnerability in Linux

CVE-2026-43239

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (26.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-43239: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

  • Linux — versions 5.19, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 7.0
  • Linux Kernel — versions 5.19

References

Frequently asked questions

What is CVE-2026-43239?
CVE-2026-43239 is a high-severity vulnerability in Linux. CVSS score: 8.8/10. Published 2026-05-06.
How severe is CVE-2026-43239?
High severity. CVSS v3 base score is 8.8 out of 10.