CVE-2026-31609

CRITICAL EPSS 36.4%
Published Apr 24, 20262mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Apr 24, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
36.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-415

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel* <6.18.24
linuxlinux_kernel*≥6.19  –  <6.19.14
linuxlinux_kernel*≥7.0  –  <7.0.1

References 4

  • git.kernel.org https://git.kernel.org/stable/c/22b7c1c619d808aec4cad3dc42103345e370d107
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/27b7c3e916218b5eb2ee350211140e961bfc49be
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a9940dcbe5cb92482c04efc7341039ddf7dbf607
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9a162c2bbcd0ac85bd07c5b37cf20286048b65c
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/22b7c1c619d808aec4cad3dc42103345e370d107
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/27b7c3e916218b5eb2ee350211140e961bfc49be
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a9940dcbe5cb92482c04efc7341039ddf7dbf607
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9a162c2bbcd0ac85bd07c5b37cf20286048b65c
    Patch