{"id":"CVE-2026-68178","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-68178","summary":"misc: nsm: pin the module while the device is open","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: nsm: pin the module while the device is open\n\nmisc_open() installs a misc driver's file operations with fops_get(),\nwhich pins file_operations::owner before replacing the file's f_op.  The\nNSM misc device leaves nsm_dev_fops.owner unset, so opening /dev/nsm does\nnot take a module reference on the nsm driver.\n\nIf the driver is built as a module, an open file descriptor can therefore\nsurvive rmmod of the module that provides its ioctl callbacks.  A later\nioctl through that descriptor can call into unloaded module text.\n\nSet nsm_dev_fops.owner to THIS_MODULE so the misc core holds the module\nwhile any /dev/nsm file descriptor is open, matching the lifetime\nexpectation for the installed file operations.","published":"2026-08-10T11:59:49.344Z","modified":"2026-08-14T04:03:55.735542495Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.12.101"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1996639f824ce9468395cdb7bcb8f467fa787e77"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1da310b94504d42001e9c32c43c5dc105b777e5f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3b231f1e9990f4c21220d0a69733ce2105891ff9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9e9a82d00c3d10129fc310a7547b24a679d5d920"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68178.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68178"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T04:03:55.735542495Z"}}