In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
nfc: pn533: hold a reference to the request skb during send_frame<\/p>\n
__pn533_send_async() publishes the command and then calls
\ndev->phy_ops->send_frame(). Once dev->cmd is set, an incoming frame
\ncan be matched to this command: the I2C threaded IRQ runs
\npn533_recv_frame(), which queues cmd_complete_work, and
\npn533_send_async_complete() frees cmd->req with consume_skb().<\/p>\n
On the I2C transport, pn533_i2c_send_frame() still dereferences the same
\nskb after i2c_master_send() returns, so a completion that races the
\nsend can free the skb while the transport is still using it.<\/p>\n
The request skb is owned by the command object and may be freed by
\ncommand completion at any time after dev->cmd is published, so the
\ntransport send path must not assume it stays alive. Hold a temporary
\nreference to the request skb across the send_frame() call so the
\ntransport always sees a live skb even if completion races the send.
\nAdd a pn533_send_cmd_frame() helper and use it from all three send
\npaths.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
nfc: pn533: hold a reference to the request skb during send_frame<\/p>\n
__pn533_send_async() publishes the command and then calls
\ndev->p<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25631","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25631","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=25631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}