{"id":"AZL-102860","summary":"CVE-2026-90066 affecting package kernel 6.6.150.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsamples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify\n\nftrace_direct_multi_init() assigns kthread_run()'s return value to\nsimple_tsk without an IS_ERR() check. When kthread_run() fails it\nreturns ERR_PTR(-ENOMEM), but init still returns 0, so the module loads\nwith simple_tsk holding an error pointer. On unload,\nftrace_direct_multi_exit() then passes that ERR_PTR to kthread_stop(),\nleading to a null-pointer-dereference.\n\nCheck the return value of kthread_run() with IS_ERR(); on failure,\nunregister the ftrace direct call and propagate the error code.","modified":"2026-09-18T14:16:35.004667123Z","published":"2026-09-17T17:16:55Z","upstream":["CVE-2026-90066"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90066"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.150.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-102860.json"}}],"schema_version":"1.9.0"}