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Resource Exhaustion Affecting perf package, versions <0:4.18.0-80.4.2.el8_0

Severity

 Recommended
high

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    96.44% (100th percentile)

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  • Snyk ID SNYK-RHEL8-PERF-3459031
  • published 26 Jul 2021
  • disclosed 17 Jun 2019
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Introduced: 17 Jun 2019

CVE-2019-11478 Open this link in a new tab
CWE-400 Open this link in a new tab

How to fix?

Upgrade RHEL:8 perf to version 0:4.18.0-80.4.2.el8_0 or higher.
This issue was patched in RHSA-2019:1479.

NVD Description

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

Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit f070ef2ac66716357066b683fb0baf55f8191a2e.

References