CVE-2026-31609

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-31609
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31609.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-31609
Downstream
Related
Published
2026-04-24T14:42:30.797Z
Modified
2026-05-18T05:59:52.240626041Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
Details

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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31609.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
cca0526ef2344cab6944d7f441fc24e152da031b
Fixed
a9940dcbe5cb92482c04efc7341039ddf7dbf607
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
37b5c06956183b65e6808b509cf637632016cdf7
Fixed
22b7c1c619d808aec4cad3dc42103345e370d107
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
21538121efe6c8c5b51c742fa02cbe820bc48714
Fixed
f9a162c2bbcd0ac85bd07c5b37cf20286048b65c
Fixed
27b7c3e916218b5eb2ee350211140e961bfc49be

Affected versions

v6.*
v6.18.11
v6.18.12
v6.18.13
v6.18.14
v6.18.15
v6.18.16
v6.18.17
v6.18.18
v6.18.19
v6.18.20
v6.18.21
v6.18.22
v6.18.23
v6.19.1
v6.19.10
v6.19.11
v6.19.12
v6.19.13
v6.19.2
v6.19.3
v6.19.4
v6.19.5
v6.19.6
v6.19.7
v6.19.8
v6.19.9

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31609.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.18.24
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
6.19.14
Type
ECOSYSTEM
Events
Introduced
6.20.0
Fixed
7.0.1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31609.json"