High severity7.8NVD Advisory· Published Dec 20, 2017· Updated May 13, 2026
CVE-2017-17806
CVE-2017-17806
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.
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
21- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/nvdPatch
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.htmlnvdIssue TrackingPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.htmlnvdIssue TrackingPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.htmlnvdIssue TrackingPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.htmlnvdIssue TrackingPatchThird Party Advisory
- github.com/torvalds/linux/commit/af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1nvdPatch
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.htmlnvdIssue TrackingThird Party Advisory
- www.securityfocus.com/bid/102293nvdThird Party AdvisoryVDB Entry
- access.redhat.com/errata/RHSA-2018:2948nvdThird Party Advisory
- lists.debian.org/debian-lts-announce/2018/01/msg00004.htmlnvdThird Party Advisory
- usn.ubuntu.com/3583-1/nvdThird Party Advisory
- usn.ubuntu.com/3583-2/nvdThird Party Advisory
- usn.ubuntu.com/3617-1/nvdThird Party Advisory
- usn.ubuntu.com/3617-2/nvdThird Party Advisory
- usn.ubuntu.com/3617-3/nvdThird Party Advisory
- usn.ubuntu.com/3619-1/nvdThird Party Advisory
- usn.ubuntu.com/3619-2/nvdThird Party Advisory
- usn.ubuntu.com/3632-1/nvdThird Party Advisory
- www.debian.org/security/2017/dsa-4073nvdThird Party Advisory
- www.debian.org/security/2018/dsa-4082nvdThird Party Advisory
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8nvdIssue TrackingRelease Notes
News mentions
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