Disclosure summary
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.
Source-reported weakness categories
CWE-667
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-64004
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| linux | linux_kernel | * {"versionStartIncluding":"6.19","versionEndExcluding":"7.0.12"} |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
Original records & references
- NIST NVD record
- CVE Program record
- git.kernel.org — Patch
- git.kernel.org — Patch
- git.kernel.org — Patch
- git.kernel.org — Patch
- git.kernel.org — Patch
- git.kernel.org — Patch
- git.kernel.org — Patch
- git.kernel.org — Patch
PUBLISHED 2026-07-19T12:17:40-04:00
MODIFIED 2026-10-08T14:37:41-04:00
INGESTED 2026-10-10T20:50:36-04:00