In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: RFCOMM: Validate MTU in rfcomm_apply_pn() to prevent infinite loop<\/p>\n
rfcomm_apply_pn() accepts the MTU value from a remote PN (Parameter
\nNegotiation) frame without checking for zero. When the remote peer
\nsends an MTU of zero, d->mtu is set to 0. This causes the sendmsg
\npath to enter an infinite loop when fragmenting data, as each fragment
\nhas size == min_t(size_t, len, 0) == 0, so the remaining length never
\ndecreases. The infinite allocation of zero-length skbs exhausts all
\nsystem memory.<\/p>\n
Fix by clamping d->mtu to RFCOMM_DEFAULT_MTU when the negotiated
\nvalue is zero, consistent with the initial value assigned in
\nrfcomm_dlc_alloc().<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: RFCOMM: Validate MTU in rfcomm_apply_pn() to prevent infinite loop<\/p>\n
rfcomm_apply_pn() accepts the MTU value from a remot<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25497","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25497","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=25497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}