CVE-2026-68141

In the Linux kernel, the following vulnerability has been resolved: net/af_iucv: fix NULL deref in afiucv_hs_callback_syn() afiucv_hs_callback_syn() allocates the child socket with GFP_ATOMIC. If the allocation fails, nsk is NULL. The connection-refused path is entered when the listen state check fails, the accept backlog is full, or nsk is NULL. The code unconditionally calls iucv_sock_kill(nsk) in that path. iucv_sock_kill() does not accept a NULL socket pointer and immediately dereferences sk via sock_flag(sk, SOCK_ZAPPED). When nsk is NULL, calling iucv_sock_kill(nsk) results in a NULL pointer dereference. Only call iucv_sock_kill() when a child socket was successfully allocated.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/07e21deb3664001995e0a456dd627ab7dbe127ec
https://git.kernel.org/stable/c/0e857185591fe79934427c9c0c1c31dc776be134
https://git.kernel.org/stable/c/33736ff5e7c97d3348ce812e8bd2e125d840743c
https://git.kernel.org/stable/c/46453b16f38ec7147351f7447e2aec6ea330f7b3
https://git.kernel.org/stable/c/47a5116e56a6b6fe1e909f244e39cd0fc26ceee4
https://git.kernel.org/stable/c/6a1eb5b46c19073f8153b7e2c19b408cf353aaf1
https://git.kernel.org/stable/c/8bb111f87ded6acb9837ec9b45d6f02cda94c51f
https://git.kernel.org/stable/c/c0b6e2ae90613c2fea7eaf3faa20985c6c2a1953

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-10 13:19

Updated : 2026-08-19 17:20

NVD link : CVE-2026-68141

Mitre link : CVE-2026-68141

CVE.ORG link : CVE-2026-68141

JSON object : View

Products Affected

No product.

CWE

No CWE.

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The code\nunconditionally calls iucv_sock_kill(nsk) in that path.\n\niucv_sock_kill() does not accept a NULL socket pointer and immediately\ndereferences sk via sock_flag(sk, SOCK_ZAPPED). When nsk is NULL,\ncalling iucv_sock_kill(nsk) results in a NULL pointer dereference.\n\nOnly call iucv_sock_kill() when a child socket was successfully\nallocated."}], "lastModified": "2026-08-19T17:20:31.207", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}