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.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 20, 2026 | Jul 20, 2026 |
| Redhat_linux | — | No solution exists | Jul 23, 2026 | Jul 19, 2026 |
| Ubuntu | — | Upgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-aws-7.0Upgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-gcp-7.0Upgrade linux-image-7.0.0-1010-azureUpgrade linux-image-azure-fde-7.0Upgrade linux-image-7.0.0-1009-awsUpgrade linux-image-ibm-7.0Upgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-azure-fdeUpgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-ibmUpgrade linux-image-nvidia-64k-7.0Upgrade linux-image-oracle-7.0Upgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-nvidia-bos-7.0Upgrade linux-image-raspi-realtime-7.0Upgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-aws-64k-7.0Upgrade linux-image-oracleUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-nvidiaUpgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-gcp-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-raspi-7.0Upgrade linux-image-nvidia-bos-64kUpgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-raspiUpgrade linux-image-awsUpgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-azureUpgrade linux-image-nvidia-7.0Upgrade linux-image-7.0.0-1014-azureUpgrade linux-image-nvidia-64kUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-aws-64kUpgrade linux-image-nvidia-bosUpgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-oracle-64kUpgrade linux-image-gcpUpgrade linux-image-azure-7.0Upgrade linux-image-nvidia-hwe-26.04 | Jul 21, 2026 | Jul 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 27, 2026 | Jul 19, 2026 |
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