In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
tpm: tpm2-sessions: wait for async KPP completion in tpm_buf_append_salt<\/p>\n
tpm_buf_append_salt() in drivers\/char\/tpm\/tpm2-sessions.c calls
\ncrypto_kpp_generate_public_key() and crypto_kpp_compute_shared_secret()
\nwithout installing a completion callback, discards both return values,
\nand immediately frees the kpp_request via kpp_request_free(). When the
\nresolved ecdh-nist-p256 KPP backend is asynchronous (atmel-ecc, HPRE,
\nkeembay-ocs), either operation returns -EINPROGRESS and the deferred
\ncompletion worker dereferences the freed request.<\/p>\n
The path fires automatically from the hwrng_fillfn kernel thread via
\ntpm_get_random -> tpm2_get_random -> tpm2_start_auth_session ->
\ntpm_buf_append_salt on every entropy poll, without any userland action.<\/p>\n
Install crypto_req_done as the completion callback, wrap both KPP
\noperations in crypto_wait_req(), and propagate errors to the caller.
\nThe wait is a no-op for synchronous backends.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
tpm: tpm2-sessions: wait for async KPP completion in tpm_buf_append_salt<\/p>\n
tpm_buf_append_salt() in drivers\/char\/tpm\/tpm2-sessions.c<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-6807","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/6807","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=6807"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6807"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6807"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}