CVE-2017-17862
Mediumkernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores unreachable code, even though it would still be processed by JIT compilers. This behavior, also considered an improper branch-pruning logic issue, could possibly be used by local users for denial of service.
CVSS 3.0 score
5.5
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness type
CWE-20CVE-2017-17862 is a Improper Input Validation vulnerability
What is Improper Input Validation?
The product receives input but does not validate it correctly, allowing attackers to craft inputs that cause unexpected behavior. Learn more on MITRE CWE
References
The following references provide additional information about CVE-2017-17862 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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Securityfocushttp://www.securityfocus.com/bid/102325Third Party Advisory VDB Entry
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Securitytrackerhttp://www.securitytracker.com/id/1040057Third Party Advisory VDB Entry
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Debian Securityhttps://anonscm.debian.org/cgit/kernel/linux.git/tree/debian/patches/bugfix/all/bpf-fix-branch-pruning-logic.patch?h=stretch-securityThird Party Advisory
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Ubuntu Securityhttps://usn.ubuntu.com/3619-1/
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Ubuntu Securityhttps://usn.ubuntu.com/3619-2/
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Ubuntu Securityhttps://usn.ubuntu.com/usn/usn-3523-2/
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Debian Securityhttps://www.debian.org/security/2017/dsa-4073Third Party Advisory
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PatchKernel patch commithttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c131187db2d3fa2f8bf32fdf4e9a4ef805168467
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PatchKernel patch commithttps://github.com/torvalds/linux/commit/c131187db2d3fa2f8bf32fdf4e9a4ef805168467
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PatchKernel patch commithttps://www.spinics.net/lists/stable/msg206984.html
Frequently asked questions
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What is CVE-2017-17862?
CVE-2017-17862 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Improper Input Validation flaw (CWE-20) . CVE-2017-17862 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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What is the CVSS score for CVE-2017-17862?
CVE-2017-17862 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.0). The vector string is
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. -
Is there a patch available for CVE-2017-17862?
No patch is currently available for CVE-2017-17862. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
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Is CVE-2017-17862 actively exploited?
No — CVE-2017-17862 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
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What is Improper Input Validation (CWE-20)?
The product receives input but does not validate it correctly, allowing attackers to craft inputs that cause unexpected behavior. View CWE-20 on MITRE CWE →