CVE-2026-68140

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Source
https://cve.org/CVERecord?id=CVE-2026-68140
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68140.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-68140
Downstream
Published
2026-08-10T11:59:03Z
Modified
2026-08-21T03:30:35Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
net/iucv: fix use-after-free of a severed iucv_path
Details

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

net/iucv: fix use-after-free of a severed iucv_path

af_iucv queues not-yet-received message notifications on iucv->message_q, each holding a raw pointer to the connection's iucv_path. When the peer severs the connection, iucv_sever_path() frees that path with iucv_path_free() but leaves the notifications queued. A later recvmsg() drains message_q via iucv_process_message_q() and hands the stale path to message_receive() -- a use-after-free of the freed iucv_path.

Drop the queued notifications when the path is severed; once the path is gone they can no longer be received. This also frees the notifications leaked when a socket is closed with messages still queued.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68140.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
f0703c80e5156406ad947cb67fe277725b48080f
Fixed
5f08c5e50bcb4680069bd3f9edd5728308816ded
Fixed
c24faf11bd31bfe0500aca12cbdd5a573a954a5d
Fixed
99ddb33748698296a6f17b9b34aa3d16a406bb3c
Fixed
23658b350b4107e8292045c2044983fd426fa15d
Fixed
a5bbaddf69853117f28173c3f5c8fc14c6b2ec82
Fixed
900cd6d8119b7f3ae5c4bf82f922ff5957df43db
Fixed
f579582c03ed526281a8450159baf1d35099a85f
Fixed
be7cc4656eb1f54029610e82d1f0fdd3f9b5ec0a

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68140.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.24
Fixed
5.10.265
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.216
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.183
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.148
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.101
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.42
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.1.6

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68140.json"