In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
ALSA: usb-audio: qcom: reject stream disable with no active interface<\/p>\n
handle_uaudio_stream_req() resolves an interface index with
\ninfo_idx_from_ifnum(), which returns -EINVAL when no interface matches.
\nThe enable branch and the response: cleanup label both guard against a
\nnegative index, but the disable branch does not: it forms
\ninfo = &uadev[pcm_card_num].info[info_idx] and dereferences it.<\/p>\n
uadev[].info is a pointer allocated only when a stream is first enabled,
\nso a negative info_idx on the disable path is unsafe in two ways:<\/p>\n
– If the card was never enabled, .info is NULL and &info[-EINVAL] is a
\n wild pointer; reading info->data_ep_pipe faults (kernel oops).<\/p>\n
– If the card was enabled at least once (.info allocated) and the
\n disable names an interface that does not match, &info[-EINVAL] points
\n before the allocation; info->data_ep_pipe \/ info->sync_ep_pipe are an
\n out-of-bounds slab read and, when non-zero, an out-of-bounds 4-byte
\n write (both pipe fields are cleared to 0). That is memory corruption,
\n not just a NULL dereference.<\/p>\n
The request is reachable from unprivileged local userspace over
\nAF_QIPCRTR. Reject a disable request with no resolved interface, matching
\nthe guard the enable path already has.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
ALSA: usb-audio: qcom: reject stream disable with no active interface<\/p>\n
handle_uaudio_stream_req() resolves an interface index with<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7105","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7105","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=7105"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7105"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}