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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-64004 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix locking in .getsockopt Mirror iucv_sock_setsockopt() and wrap the whole switch in lock_sock()/release_sock(). The pre-existing SO_MSGLIMIT-only lock becomes redundant and is removed. Any AF_IUCV HIPER user can potentially crash the kernel by racing recvmsg() with getsockopt(SO_MSGSIZE): the SO_MSGSIZE arm dereferences iucv->hs_dev->mtu after iucv_sock_close() (called from the racing recvmsg()) has set hs_dev to NULL, producing a NULL pointer dereference oops.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/1fc30bd4e55e2dd622d2d366cecd732c1841bbee kernel.org
https://git.kernel.org/stable/c/3589d20a666caf30ad100c960a2de7de390fce88 kernel.org
https://git.kernel.org/stable/c/45bb8de8c95d8899f4b8f61bd9bceb8132af73cb kernel.org
https://git.kernel.org/stable/c/69554adc7a6fa04ede3ad7512321d83748e3c920 kernel.org
https://git.kernel.org/stable/c/6e792b8dd3002bbc4136745928a9605df1a72b8a kernel.org
https://git.kernel.org/stable/c/884eb247b74d86db97e3a37f0d6fc8e1e83590dd kernel.org
https://git.kernel.org/stable/c/9817369243380e287ebe5525411557eaa3aa2a79 kernel.org
https://git.kernel.org/stable/c/cd691beafea0dd779e69e81ccc26b0ab50efcb5e kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-64004
NVD Published Date:
07/19/2026
NVD Last Modified:
07/20/2026
Source:
kernel.org