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.
References (10)
Core 10
Core References
Third Party Advisory x_refsource_misc
https://github.com/torvalds/linux/commit/c131187db2d3fa2f8bf32fdf4e9a4ef805168467
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3619-2/
Vendor Advisory x_refsource_misc
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c131187db2d3fa2f8bf32fdf4e9a4ef805168467
Patch, Third Party Advisory x_refsource_misc
https://www.spinics.net/lists/stable/msg206984.html
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/102325
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2017/dsa-4073
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/usn/usn-3523-2/
Third Party Advisory x_refsource_misc
https://anonscm.debian.org/cgit/kernel/linux.git/tree/debian/patches/bugfix/all/bpf-fix-branch-pruning-logic.patch?h=stretch-security
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3619-1/
Third Party Advisory, VDB Entry vdb-entry
x_refsource_sectrack
http://www.securitytracker.com/id/1040057
Scores
CVSS v3
5.5
EPSS
0.0008
EPSS Percentile
22.9%
Attack Vector
LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-20
Status
published
Products (2)
debian/debian_linux
9.0
linux/linux_kernel
< 4.14.8
Published
Dec 27, 2017
Tracked Since
Feb 18, 2026