CVE-2026-90291
CVE CVE-2026-90291EUVD EUVD-2026-81884Published 2026-09-17T16:08:18.000ZLast changed 2026-09-18T17:54:20.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: module/dups: Fix use-after-free in kmod_dup_req lifetime handling The kmod dups code uses RCU to ensure that a kmod_dup_req instance is freed only after it is no longer referenced. When releasing an instance, the kmod_dup_request_delete() function removes the kmod_dup_req from the dup_kmod_reqs list, waits via synchronize_rcu() and finally frees it. However, this doesn't work correctly because parallel users referencing the instance in kmod_dup_request_exists_wait() don't enter an RCU read-side critical section. This can result in a use-after-free. The kmod_dup_request_exists_wait() function may need to hold a valid reference to a kmod_dup_req instance across a blocking wait until the corresponding modprobe command completes. This makes it unsuitable for RCU. Fix the issue by changing the lifecycle management of kmod_dup_req to use reference counting.
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: 6.18.52; patch: 7.2.6; 8660484ed1cf3261e89e0bad94c6395597e87599 <2c85e0fb528e039aa8ea1e9c2a1f64347f990541; 8660484ed1cf3261e89e0bad94c6395597e87599 <b2709aad7599f6fd957939b60f4a8323c8f08072; patch: 6.12.110; 6.4; 8660484ed1cf3261e89e0bad94c6395597e87599 <5eecb11b543f9f417bcf0dea239ff99c6af65dbd; patch: 7.3-rc1; 8660484ed1cf3261e89e0bad94c6395597e87599 <cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca; patch: 0
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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