{"id":"CVE-2026-31582","summary":"hwmon: (powerz) Fix use-after-free on USB disconnect","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (powerz) Fix use-after-free on USB disconnect\n\nAfter powerz_disconnect() frees the URB and releases the mutex, a\nsubsequent powerz_read() call can acquire the mutex and call\npowerz_read_data(), which dereferences the freed URB pointer.\n\nFix by:\n - Setting priv-\u003eurb to NULL in powerz_disconnect() so that\n   powerz_read_data() can detect the disconnected state.\n - Adding a !priv-\u003eurb check at the start of powerz_read_data()\n   to return -ENODEV on a disconnected device.\n - Moving usb_set_intfdata() before hwmon registration so the\n   disconnect handler can always find the priv pointer.","modified":"2026-06-18T03:56:22.900978420Z","published":"2026-04-24T14:42:12.257Z","related":["CGA-6q6r-qjwr-gv86","openSUSE-SU-2026:10703-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31582.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7003ae4810ca83f0ddca85b768500e313c4b998c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9e1b798257f96d2e2a2639830eb71add545ce749"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c78e1d4e48f23792adaa7c94251e22b0d9700a39"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31582.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31582"},{"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":"4381a36abdf1c5c0323c1c51f869dc000115eb20"},{"fixed":"c78e1d4e48f23792adaa7c94251e22b0d9700a39"},{"fixed":"9e1b798257f96d2e2a2639830eb71add545ce749"},{"fixed":"7003ae4810ca83f0ddca85b768500e313c4b998c"},{"fixed":"61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4"},{"fixed":"08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31582.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.83"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.24"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.14"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.20.0"},{"fixed":"7.0.1"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31582.json"}}],"schema_version":"1.7.5"}