7.8

CVE-2026-64004

net/iucv: fix locking in .getsockopt

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.4 < 5.10.259
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.210
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.176
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.143
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.93
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.35
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.12
Linux ≫ Linux Kernel Version 7.1 Update rc1
Linux ≫ Linux Kernel Version 7.1 Update rc2
Linux ≫ Linux Kernel Version 7.1 Update rc3
Linux ≫ Linux Kernel Version 7.1 Update rc4
Linux ≫ Linux Kernel Version 7.1 Update rc5
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.13% 0.029
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-667 Improper Locking

The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

https://git.kernel.org/stable/c/884eb247b74d86db97e3a37f0d6fc8e1e83590dd
Patch
https://git.kernel.org/stable/c/45bb8de8c95d8899f4b8f61bd9bceb8132af73cb
Patch
https://git.kernel.org/stable/c/1fc30bd4e55e2dd622d2d366cecd732c1841bbee
Patch
https://git.kernel.org/stable/c/cd691beafea0dd779e69e81ccc26b0ab50efcb5e
Patch
https://git.kernel.org/stable/c/6e792b8dd3002bbc4136745928a9605df1a72b8a
Patch
https://git.kernel.org/stable/c/9817369243380e287ebe5525411557eaa3aa2a79
Patch
https://git.kernel.org/stable/c/69554adc7a6fa04ede3ad7512321d83748e3c920
Patch
https://git.kernel.org/stable/c/3589d20a666caf30ad100c960a2de7de390fce88
Patch