CVE-2026-72151

CVE CVE-2026-72151EUVD EUVD-2026-58909Published 2026-08-15T05:53:22.000ZLast changed 2026-08-17T05:41:00.000ZCVSS 8.4

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: tpm: tpm2-sessions: wait for async KPP completion in tpm_buf_append_salt tpm_buf_append_salt() in drivers/char/tpm/tpm2-sessions.c calls crypto_kpp_generate_public_key() and crypto_kpp_compute_shared_secret() without installing a completion callback, discards both return values, and immediately frees the kpp_request via kpp_request_free(). When the resolved ecdh-nist-p256 KPP backend is asynchronous (atmel-ecc, HPRE, keembay-ocs), either operation returns -EINPROGRESS and the deferred completion worker dereferences the freed request. The path fires automatically from the hwrng_fillfn kernel thread via tpm_get_random -> tpm2_get_random -> tpm2_start_auth_session -> tpm_buf_append_salt on every entropy poll, without any userland action. Install crypto_req_done as the completion callback, wrap both KPP operations in crypto_wait_req(), and propagate errors to the caller. The wait is a no-op for synchronous backends.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.1.5; 6.10; 1085b8276bb4239daa7008f0dcd5c973e4bd690f <111e520efbe82b324bc42b1999b723c0619eea6d; patch: 6.12.97; patch: 0; patch: 6.18.40; patch: 7.2; 1085b8276bb4239daa7008f0dcd5c973e4bd690f <73851a7c43dfa52d2ed9415889b33daf85da0ed9; 1085b8276bb4239daa7008f0dcd5c973e4bd690f <493333f167926c7adab8e7563e21ad71d8af84fa; 1085b8276bb4239daa7008f0dcd5c973e4bd690f <934d1cd40e2893bf7a041b54f6afd1c008d7a21c

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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