CVE-2026-31609CWE-415

CVE-2026-31609

Critical · published April 24, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
51.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00671 · 51.4th percentile
Weakness
CWE-415 · Double Free
Published
2026-04-24T19:16Z
Affected products (3)
ProductVersionsFixed in
linux/linux_kernel< 6.18.246.18.24
linux/linux_kernel≥ 6.19, < 6.19.146.19.14
linux/linux_kernel≥ 7.0, < 7.0.17.0.1
References (4)
https://git.kernel.org/stable/c/22b7c1c619d808aec4cad3dc42103345e370d107 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/27b7c3e916218b5eb2ee350211140e961bfc49be · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a9940dcbe5cb92482c04efc7341039ddf7dbf607 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f9a162c2bbcd0ac85bd07c5b37cf20286048b65c · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 24 APR 14:42Z
    smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
    cvelistv5