Out-of-bounds Read Affecting kernel-uek-devel package, versions <0:5.4.17-2011.1.2.el7uek


Severity

Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.09% (38th percentile)

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  • Snyk IDSNYK-ORACLE7-KERNELUEKDEVEL-2574042
  • published10 Apr 2022
  • disclosed2 Apr 2020

Introduced: 2 Apr 2020

CVE-2020-8835  (opens in a new tab)
CWE-125  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Oracle:7 kernel-uek-devel to version 0:5.4.17-2011.1.2.el7uek or higher.
This issue was patched in ELSA-2020-5663.

NVD Description

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

In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)

References

CVSS Scores

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