CVE-2026-68178High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: misc: nsm: pin the module while the device is open misc_open() installs a misc driver's file operations with fops_get(), which pins file_operations::owner before repla…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
Last analysed / modified upstream
0.2% → 0.2%
In the Linux kernel, the following vulnerability has been resolved:
misc: nsm: pin the module while the device is open
misc_open() installs a misc driver's file operations with fops_get(), which pins file_operations::owner before replacing the file's f_op. The NSM misc device leaves nsm_dev_fops.owner unset, so opening /dev/nsm does not take a module reference on the nsm driver.
If the driver is built as a module, an open file descriptor can therefore survive rmmod of the module that provides its ioctl callbacks. A later ioctl through that descriptor can call into unloaded module text.
Set nsm_dev_fops.owner to THIS_MODULE so the misc core holds the module while any /dev/nsm file descriptor is open, matching the lifetime expectation for the installed file operations.
Linux >= b9873755a6c8ccfce79094c4dce9efa3ecb1a749 < 1996639f824ce9468395cdb7bcb8f467fa787e77Linux >= b9873755a6c8ccfce79094c4dce9efa3ecb1a749 < 1da310b94504d42001e9c32c43c5dc105b777e5fLinux >= b9873755a6c8ccfce79094c4dce9efa3ecb1a749 < 9e9a82d00c3d10129fc310a7547b24a679d5d920Linux >= b9873755a6c8ccfce79094c4dce9efa3ecb1a749 < 3b231f1e9990f4c21220d0a69733ce2105891ff9Linux 6.8Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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