In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
ALSA: control: Don’t add invalid kcontrols to LED layer<\/p>\n
The kcontrol LED state layer tries to track the all associated
\nkcontrol elements with naive assumptions that they are readable.
\nBut one can create a write-only element that has no get callback (even
\na user element can do it), and this may lead to a NULL dereference at
\nthe call chain of snd_ctl_led_notify(), as found by syzkaller.<\/p>\n
For avoiding the Oops, add a sanity check of the kcontrol’s info and
\nget callbacks, and just skip the invalid kcontrols before assigning
\nthe kctl to the LED layer.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
ALSA: control: Don’t add invalid kcontrols to LED layer<\/p>\n
The kcontrol LED state layer tries to track the all associated
\nkcontrol el<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25469","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25469","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=25469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}