CVE-2026-68397
CVE CVE-2026-68397EUVD EUVD-2026-55583Published 2026-08-10T12:04:16.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: net/iucv: take a reference on the socket found in afiucv_hs_rcv() afiucv_hs_rcv() looks up the destination socket under iucv_sk_list.lock, drops the lock, and then passes the socket to the afiucv_hs_callback_*() handlers without holding a reference. AF_IUCV sockets are not RCU-protected and are freed synchronously by iucv_sock_kill() -> sock_put(), so a concurrent close can free the socket in the window between read_unlock() and the handler, which then dereferences freed memory (for example sk->sk_data_ready() in afiucv_hs_callback_syn()). Take a reference with sock_hold() while the socket is still on the list and release it with sock_put() once the handler has run.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 7.2-rc4; 3881ac441f642d56503818123446f7298442236b <4fa349156043dc119721d067329714179f501749; 3881ac441f642d56503818123446f7298442236b <1801cb20a5025a787d6853e19c38db138344b4b4; patch: 0; 3881ac441f642d56503818123446f7298442236b <5595ea59cdf29182cf6a270cacc1426c57b603de; patch: 6.12.101; 3881ac441f642d56503818123446f7298442236b <4dc0e63abf8bc7ba8892e617c1fb8b204361e022; patch: 6.18.42; 3.2; patch: 6.6.148; 3881ac441f642d56503818123446f7298442236b <c75a950e77356e526672cba4584080c6c8b793b6; patch: 7.1.6
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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