CVE-2026-64075

CVE CVE-2026-64075EUVD EUVD-2026-45648Published 2026-07-19T15:39:49.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: fprobe: Fix unregister_fprobe() to wait for RCU grace period Commit 4346ba1604093 ("fprobe: Rewrite fprobe on function-graph tracer") changed fprobe to register struct fprobe to an rcu-hlist, but it forgot to wait for RCU GP. Thus there can be use-after-free if the fprobe is released right after unregistering. This can be happened on fprobe event and sample module code. To fix this issue, add synchronize_rcu() in unregister_fprobe(). Note that BPF is OK because fprobe is used as a part of bpf_kprobe_multi_link. This unregisters its fprobe in bpf_kprobe_multi_link_release() and it is deallocated via bpf_kprobe_multi_link_dealloc(), which is invoked from bpf_link_defer_dealloc_rcu_gp() RCU callback. For BPF, this also introduced unregister_fprobe_async() which does NOT wait for RCU grace priod.

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 6.14; 4346ba1604093305a287e08eb465a9c15ba05b80 <56b4cfcf1518245493c60fd39c56978f508f1816; 4346ba1604093305a287e08eb465a9c15ba05b80 <a4f6a9005ed6cfd360ef2520430927f05f92ffb0; patch: 7.1; 4346ba1604093305a287e08eb465a9c15ba05b80 <657b594b2084b39a4bc6d8493aa2140cb00cea49; patch: 6.18.34; patch: 0; patch: 7.0.11

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

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Linux — Linux

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