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CVE-2026-31609

Last refreshed2026-10-17

Status: UPDATED  |  Advisory ID: CVE-2026-31609

Key Details

CVECVE-2026-31609
CVSS Score / Version
9.8 (Critical) / CVSS v3.1
Updated2026-10-16
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Linux Kernel
Classified as
CWE-415 (Double Free)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
LinuxLinux Kernel
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

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

smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()

smbd_send_batch_flush() already calls smbd_free_send_io(),

so we should not call it again after smbd_post_send()

moved it to the batch list.

What to Do

Monitor Linux's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-31609
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-31609

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