{"id":"CVE-2026-64163","summary":"test_kprobes: clear kprobes between test runs","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntest_kprobes: clear kprobes between test runs\n\nRunning the kprobes sanity tests twice makes all tests fail and\neventually crashes the kernel.\n\n[root@martin-riscv-1 ~]# echo 1 \u003e /sys/kernel/debug/kunit/kprobes_test/run\n...\n   # Totals: pass:5 fail:0 skip:0 total:5\n   ok 1 kprobes_test\n[root@martin-riscv-1 ~]# echo 1 \u003e /sys/kernel/debug/kunit/kprobes_test/run\n...\n  # test_kprobe: EXPECTATION FAILED at lib/tests/test_kprobes.c:64\n  Expected 0 == register_kprobe(&kp), but\n      register_kprobe(&kp) == -22 (0xffffffffffffffea)\n...\n  Unable to handle kernel paging request ...\n\nThe testsuite defines several kprobes and kretprobes as static variables\nthat are preserved across test runs.\n\nAfter register_kprobe and unregister_kprobe, a kprobe contains some\nleftover data that must be cleared before the kprobe can be registered\nagain. The tests are setting symbol_name to define the probe location.\nAddress and flags must be cleared.\n\nThe existing code clears some of the probes between subsequent tests, but\nnot between two test runs. The leftover data from a previous test run\nmakes the registrations fail in the next run.\n\nMove the cleanups for all kprobes into kprobes_test_init, this function\nis called before each single test (including the first test of a test\nrun).","modified":"2026-07-21T03:46:54.847161013Z","published":"2026-07-19T15:40:49.172Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64163.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/08d355936fcf70c81c94f9fe7310450b65c53399"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1c24cf1fd67f6702c719ab73499392cb7af956ae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/96515819d79f356f40da5540968d838ea570fab9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/accc0004c501a9918313142282b094d408af06fb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ef5581bb30efb939cc2bf093475c6cc85258e5cd"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64163.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64163"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e44e81c5b90f698025eadceb7eef8661eda117d5"},{"fixed":"08d355936fcf70c81c94f9fe7310450b65c53399"},{"fixed":"accc0004c501a9918313142282b094d408af06fb"},{"fixed":"1c24cf1fd67f6702c719ab73499392cb7af956ae"},{"fixed":"96515819d79f356f40da5540968d838ea570fab9"},{"fixed":"ef5581bb30efb939cc2bf093475c6cc85258e5cd"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64163.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.6.142"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.92"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.34"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64163.json"}}],"schema_version":"1.7.5"}