{"cve":"CVE-2017-17806","nvd":{"published":"2017-12-20T23:29:00.377","modified":"2026-06-17T01:11:41.030","status":"Modified","description":"The HMAC implementation (crypto/hmac.c) in the Linux kernel before 4.14.8 does not validate that the underlying cryptographic hash algorithm is unkeyed, allowing a local attacker able to use the AF_ALG-based hash interface (CONFIG_CRYPTO_USER_API_HASH) and the SHA-3 hash algorithm (CONFIG_CRYPTO_SHA3) to cause a kernel stack buffer overflow by executing a crafted sequence of system calls that encounter a missing SHA-3 initialization.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1","http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html","http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html","http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html","http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html"],"products":["canonical:ubuntu_linux","debian:debian_linux","linux:linux_kernel","opensuse:leap","opensuse_project:leap","suse:linux_enterprise_desktop","suse:linux_enterprise_server","suse:linux_enterprise_server_for_raspberry_pi"],"source":"nvd","synced_at":"2026-10-19T20:47:56.471723566+00:00"},"epss":{"cve":"CVE-2017-17806","score":0.00557,"percentile":0.46429,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}