CVE-2017-17862

Description

kernel/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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/torvalds/linux/commit/c131187db2d3fa2f8bf32fdf4e9a4ef805168467 third party advisory
https://usn.ubuntu.com/3619-2/ vendor advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c131187db2d3fa2f8bf32fdf4e9a4ef805168467 vendor advisory
https://www.spinics.net/lists/stable/msg206984.html third party advisory patch
http://www.securityfocus.com/bid/102325 vdb entry third party advisory
https://www.debian.org/security/2017/dsa-4073 third party advisory vendor advisory
https://usn.ubuntu.com/usn/usn-3523-2/ vendor advisory
https://anonscm.debian.org/cgit/kernel/linux.git/tree/debian/patches/bugfix/all/bpf-fix-branch-pruning-logic.patch?h=stretch-security third party advisory
https://usn.ubuntu.com/3619-1/ vendor advisory
http://www.securitytracker.com/id/1040057 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-17862?
CVE-2017-17862 has been scored as a medium severity vulnerability.
How to fix CVE-2017-17862?
To fix CVE-2017-17862, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-17862 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-17862 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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