CVE-2017-17806: canonical ubuntu_linux Out-of-bounds Write
Vulnerability summary
CVE-2017-17806 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in canonical ubuntu_linux. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 46.4% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 17 · Related 13Timeline
- 20-12-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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 metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.56%
Chance of exploitation in the next 30 days
Percentile
46%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.56% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu22 products
- linux< 3.13.0-142.191 | < 4.4.0-119.143
- linux-aws< 4.4.0-1016.16 | < 4.4.0-1054.63
- linux-azure< 4.13.0-1014.17
- linux-azure-6.11All versions (No fix recorded)
- linux-azure-fdeAll versions (No fix recorded)
Suse3 products
- linux_enterprise_desktop12:sp2 | 12:sp3
- linux_enterprise_server11:extra | 11:sp4 | 12:sp2 | 12:sp3
- linux_enterprise_server_for_raspberry_pi12:sp2
Debian2 products
- linux< 4.14.7-1
- debian_linuxEOL8.0 | 9.0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 17.10
Linux1 product
- linux_kernel< 3.2.97 | ≥ 3.3, < 3.16.52 | ≥ 3.17, < 3.18.89 | ≥ 3.19, < 4.1.49 | ≥ 4.2, < 4.4.107 | ≥ 4.5, < 4.9.71 | ≥ 4.10, < 4.14.8
Opensuse1 product
- leapEOL42.2
Opensuse_project1 product
- leap42.3
7 vendors · 31 products
References
32 links
- lists.debian.org/debian-lts-announce/2018/01/msg00004.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.htmlVendor AdvisoryX Refsource SUSEIssue TrackingPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.htmlVendor AdvisoryX Refsource SUSEIssue TrackingPatchThird Party Advisory
- github.com/torvalds/linux/commit/af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1X Refsource CONFIRMPatchREPORT
Show all 32 references
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.htmlVendor AdvisoryX Refsource SUSEIssue TrackingPatchThird Party Advisory
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8X Refsource CONFIRMIssue TrackingRelease NotesREPORT
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.htmlVendor AdvisoryX Refsource SUSEIssue TrackingPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.htmlVendor AdvisoryX Refsource SUSEIssue TrackingThird Party Advisory