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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
Linux Kernel Extended BPF Verifier Branch Pruning Logic Error May Let Local Users Cause Denial of Service Conditions
SecurityTracker Alert ID:  1040057
SecurityTracker URL:  http://securitytracker.com/id/1040057
CVE Reference:   CVE-2017-17862   (Links to External Site)
Date:  Dec 26 2017
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in the Linux kernel. A local user can cause denial of service conditions on the target system.

The Extended BPF verifier ('kernel/bpf/verifier.c') does not properly explore unreachable code paths that may be processed by JIT compilers. A local user can run a specially crafted application to cause denial of service conditions on the target system.

Alexei Starovoitov reported this vulnerability.

Impact:   A local user can cause denial of service conditions on the target system.
Solution:   The vendor has issued a source code fix [in November 2017], available at:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c131187db2d3fa2f8bf32fdf4e9a4ef805168467

Vendor URL:  www.kernel.org/ (Links to External Site)
Cause:   State error

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jan 10 2018 (Ubuntu Issues Fix) Linux Kernel Extended BPF Verifier Branch Pruning Logic Error May Let Local Users Cause Denial of Service Conditions
Ubuntu has issued a fix for Ubuntu Linux 17.10.



 Source Message Contents



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