Get a Demo

Let's Patch It!

Book a short call with one our specialists, we'll walk you through how Endor Patches work, and ask you a few questions about your environment (like your primary programming languages and repository management). We'll also send you an email right after you fill out the form, feel free to reply with any questions you have in advance!

CVE

CVE-2026-31609

smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
Back to all
CVE

CVE-2026-31609

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

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

smb: client: avoid double-free in smbdfreesendio() after smbdsendbatchflush()

smbdsendbatchflush() already calls smbdfreesendio(),

so we should not call it again after smbdpostsend()

moved it to the batch list.

Package Versions Affected

Package Version
patch Availability
No items found.

Automatically patch vulnerabilities without upgrading

Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/22b7c1c619d808aec4cad3dc42103345e370d107, https://git.kernel.org/stable/c/27b7c3e916218b5eb2ee350211140e961bfc49be, https://git.kernel.org/stable/c/a9940dcbe5cb92482c04efc7341039ddf7dbf607, https://git.kernel.org/stable/c/f9a162c2bbcd0ac85bd07c5b37cf20286048b65c, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31609.json, https://nvd.nist.gov/vuln/detail/CVE-2026-31609, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00457%
EPSS Percentile
0.36685%
Introduced Version
cca0526ef2344cab6944d7f441fc24e152da031b,37b5c06956183b65e6808b509cf637632016cdf7,21538121efe6c8c5b51c742fa02cbe820bc48714,6.18.11,6.19.1,0,6.19.0,6.20.0
Fix Available
a9940dcbe5cb92482c04efc7341039ddf7dbf607,22b7c1c619d808aec4cad3dc42103345e370d107,27b7c3e916218b5eb2ee350211140e961bfc49be,6.18.24,6.19.14,7.0.1,1:6.18.25-52.107.amzn2023,1:1.0-0.amzn2023,6.18.31-r0

Fix Critical Vulnerabilities Instantly

Secure your app without upgrading.
Fix Without Upgrading