RHSA-2019:0188
Vulnerability from csaf_redhat
Published
2019-01-29 17:23
Modified
2025-10-09 18:21
Summary
Red Hat Security Advisory: kernel-rt security and bug fix update

Notes

Topic
An update for kernel-rt is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: Use-after-free due to race condition in AF_PACKET implementation (CVE-2018-18559) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * The kernel-rt packages have been upgraded to the 3.10.0-957.5.1 source tree, which provides a number of bug fixes over the previous version. (BZ#1653822) * Under certain circumstances, the following warning message, which indicated a SCHED_DEADLINE bandwidth tracking mechanism error, occurred: WARNING: CPU: 8 PID: 19536 at kernel/sched/deadline.c:64 dequeue_task_dl+0x121/0x140 This update fixes the sched_setscheduler() core kernel function, and backports multiple upstream patches to the SCHED_DEADLINE scheduler. As a result, the SCHED_DEADLINE bandwidth tracking mechanism is prevented from error conditions, and the warning message no longer occurs. (BZ#1655439)
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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        "name": "Use After Free"
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      "discovery_date": "2018-10-23T00:00:00+00:00",
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          "category": "description",
          "text": "A use-after-free flaw can occur in the Linux kernel due to a race condition between packet_do_bind() and packet_notifier() functions called for an AF_PACKET socket. An unprivileged, local user could use this flaw to induce kernel memory corruption on the system, leading to an unresponsive system or to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: Use-after-free due to race condition in AF_PACKET implementation",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2018-18559"
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        {
          "category": "external",
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1641878"
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        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2018-18559",
          "url": "https://www.cve.org/CVERecord?id=CVE-2018-18559"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2018-18559",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-18559"
        },
        {
          "category": "external",
          "summary": "https://blogs.securiteam.com/index.php/archives/3731",
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      "title": "kernel: Use-after-free due to race condition in AF_PACKET implementation"
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  ]
}


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