VULNERABILITY INTELLIGENCE

CVE-2017-7979

CVSS score7.8 HIGH
EPSS probability0.40%
CISA KEVNot currently listed
Published2017-04-19
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

The cookie feature in the packet action API implementation in net/sched/act_api.c in the Linux kernel 4.11.x through 4.11-rc7 mishandles the tb nlattr array, which allows local users to cause a denial of service (uninitialized memory access and refcount underflow, and system hang or crash) or possibly have unspecified other impact via "tc filter add" commands in certain contexts. NOTE: this does not affect stable kernels, such as 4.10.x, from kernel.org.

Weakness classification

  • CWE-20: Improper Input Validation

Primary references