Integer Overflow or Wraparound Affecting kernel-rt-debug package, versions <0:4.18.0-193.rt13.51.el8


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.01% (85th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTDEBUG-3725196
  • published26 Jul 2021
  • disclosed16 Apr 2019

Introduced: 16 Apr 2019

CVE-2019-18805  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-rt-debug to version 0:4.18.0-193.rt13.51.el8 or higher.
This issue was patched in RHSA-2020:1567.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug package and not the kernel-rt-debug package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11. There is a net/ipv4/tcp_input.c signed integer overflow in tcp_ack_update_rtt() when userspace writes a very large integer to /proc/sys/net/ipv4/tcp_min_rtt_wlen, leading to a denial of service or possibly unspecified other impact, aka CID-19fad20d15a6.

CVSS Scores

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