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OpenAdvisories
High RHSA-2019:1486 3 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Sep 13, 2024 · Updated Jun 29, 2026

Ecosystem: Red Hat

Fixed packages 17

ReleasePackageFixed in
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-debug 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-debug-debuginfo 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-debug-devel 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-debug-kvm 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-debug-kvm-debuginfo 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-debuginfo 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-debuginfo-common-x86_64 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-devel 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-doc 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-kvm 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-kvm-debuginfo 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-trace 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-trace-debuginfo 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-trace-devel 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-trace-kvm 0:3.10.0-957.21.3.rt56.935.el7
Red Hat · RHEL 7 rhel_extras_rt:7 kernel-rt-trace-kvm-debuginfo 0:3.10.0-957.21.3.rt56.935.el7

Vulnerabilities 3

  • High 7.5
    CVE-2019-11477 Public exploit EPSS 99%

    Integer overflow in TCP_SKB_CB(skb)->tcp_gso_segs

    Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service. This has been fi…

    Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Medium 5.3
    CVE-2019-11478 Public exploit EPSS 94%

    SACK can cause extensive memory use via fragmented resend queue

    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 serv…

    Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Medium 5.3
    CVE-2019-11479 EPSS 91%

    Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fr…

    Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • article
    https://access.redhat.com/security/vulnerabilities/tcpsack
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=1719123
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=1719128
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=1719129
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2019/rhsa-2019_1486.json
  • report
    https://access.redhat.com/security/cve/CVE-2019-11477
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2019-11477
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2019-11477
  • article
    https://patchwork.ozlabs.org/project/netdev/list/?series=114310
  • article
    https://www.openwall.com/lists/oss-security/2019/06/17/5
  • report
    https://access.redhat.com/security/cve/CVE-2019-11478
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2019-11478
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2019-11478
  • report
    https://access.redhat.com/security/cve/CVE-2019-11479
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2019-11479
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2019-11479