Out-of-bounds Read Affecting kernel-rt-trace package, versions <0:3.10.0-957.10.1.rt56.921.el7


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.06% (30th percentile)

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  • Snyk IDSNYK-RHEL7-KERNELRTTRACE-4919335
  • published26 Jul 2021
  • disclosed5 Oct 2018

Introduced: 5 Oct 2018

CVE-2018-18445  (opens in a new tab)
CWE-125  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade RHEL:7 kernel-rt-trace to version 0:3.10.0-957.10.1.rt56.921.el7 or higher.
This issue was patched in RHSA-2019:0514.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-trace package and not the kernel-rt-trace package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

In the Linux kernel 4.14.x, 4.15.x, 4.16.x, 4.17.x, and 4.18.x before 4.18.13, faulty computation of numeric bounds in the BPF verifier permits out-of-bounds memory accesses because adjust_scalar_min_max_vals in kernel/bpf/verifier.c mishandles 32-bit right shifts.

CVSS Scores

version 3.1