CVE-2026-90066
CVE CVE-2026-90066EUVD EUVD-2026-81927Published 2026-09-17T16:05:48.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify ftrace_direct_multi_init() assigns kthread_run()'s return value to simple_tsk without an IS_ERR() check. When kthread_run() fails it returns ERR_PTR(-ENOMEM), but init still returns 0, so the module loads with simple_tsk holding an error pointer. On unload, ftrace_direct_multi_exit() then passes that ERR_PTR to kthread_stop(), leading to a null-pointer-dereference. Check the return value of kthread_run() with IS_ERR(); on failure, unregister the ftrace direct call and propagate the error code.
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 e1067a07cfbc5a36abad3752fafe4c79e06db1bb <98b7b2a29ae87937aa02ab9391543ef8c602cd94; patch: 6.6.157; patch: 0; patch: 7.3-rc1; 5.16; patch: 6.12.110; e1067a07cfbc5a36abad3752fafe4c79e06db1bb <6727b7618f49401acf373fa3ec5712e2ec52e5cf; e1067a07cfbc5a36abad3752fafe4c79e06db1bb <cf839636911d8313f3ecd098329fd0b96499e4cf; e1067a07cfbc5a36abad3752fafe4c79e06db1bb <7a96b9f6d5ba23dbce66c8a4a242effd4c01a830; patch: 6.18.52; e1067a07cfbc5a36abad3752fafe4c79e06db1bb <626614df9080d7052fbe24dc90b5434717ab7a9f; patch: 7.2.6
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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