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Use After Free Affecting kernel package, versions <0:3.10.0-514.6.1.el7

Severity

 Recommended
high

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    0.05% (18th percentile)

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  • Snyk ID SNYK-RHEL7-KERNEL-4671801
  • published 26 Jul 2021
  • disclosed 15 Aug 2016
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Introduced: 15 Aug 2016

CVE-2016-6828 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade RHEL:7 kernel to version 0:3.10.0-514.6.1.el7 or higher.
This issue was patched in RHSA-2017:0086.

NVD Description

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

The tcp_check_send_head function in include/net/tcp.h in the Linux kernel before 4.7.5 does not properly maintain certain SACK state after a failed data copy, which allows local users to cause a denial of service (tcp_xmit_retransmit_queue use-after-free and system crash) via a crafted SACK option.

References