netlabel: validate unlabeled address and mask attribute lengths

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CVE-2026-53238

In the Linux kernel, the following vulnerability has been resolved: netlabel: validate unlabeled address and mask attribute lengths netlblunlabeladdrinfoget used the address attribute length to determine whether the attribute data could be read as an IPv4 or IPv6 address, but did not independentl...

CVE-2026-53238

CVE-2026-53238 affects the Linux kernel netlabel/privacy path in netlbl_unlabel_addrinfo_get, where the address attribute length was used to infer IPv4/IPv6 data but the corresponding mask length was not independently validated. A crafted Generic Netlink request could supply a valid IPv4/IPv6 add...