In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
misc: nsm: pin the module while the device is open<\/p>\n
misc_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.<\/p>\n
If 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.<\/p>\n
Set 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.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
misc: nsm: pin the module while the device is open<\/p>\n
misc_open() installs a misc driver’s file operations with fops_get(),
\nwhich pin<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5372","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5372","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}