{"apiVersion":"1.0","identifier":"CVE-2026-72151","description":"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.","publishedAt":"2026-08-15T06:21:32","lastModifiedAt":"2026-08-17T06:18:15","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72151","cvssScore":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00182,"riskScore":0.85,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72151","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72151","en":"https://www.redsauce.net/en/cves/CVE-2026-72151","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72151","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72151","de":"https://www.redsauce.net/de/cves/CVE-2026-72151","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72151","el":"https://www.redsauce.net/el/cves/CVE-2026-72151"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72151"}}