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OpenAdvisories
High 1 exploited CVE RHSA-2023:1556 2 CVEs

Red Hat Security Advisory: kernel-rt security and bug fix update

Published Sep 13, 2024 · Updated Sep 30, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-core 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-debug 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-debug-core 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-debug-debuginfo 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-debug-devel 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-debug-kvm 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-debug-modules 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-debug-modules-extra 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-debuginfo 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-devel 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-kvm 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-modules 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::nfv kernel-rt-modules-extra 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-core 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-debug 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-debug-core 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-debug-debuginfo 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-debug-devel 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-debug-modules 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-debug-modules-extra 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-debuginfo 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-devel 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-modules 0:4.18.0-305.86.2.rt7.160.el8_4
Red Hat · RHEL 8.4 EUS rhel_eus:8.4::realtime kernel-rt-modules-extra 0:4.18.0-305.86.2.rt7.160.el8_4

Vulnerabilities 2

  • High 7.9
    CVE-2023-0266 Exploited Public exploit

    Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel

    A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. …

    Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
    KEV Mar 30, 2023
  • High 7.8
    CVE-2023-0461 Public exploit

    Use-after-free vulnerability in the Linux Kernel

    There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation. To reach the vulnerability kernel configuration flag CONFIG_TLS or CONFIG_XFRM_ESPINTCP has to be configured, but the operation does not …

    Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2163379
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2176192
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_1556.json
  • report
    https://access.redhat.com/security/cve/CVE-2023-0266
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-0266
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-0266
  • article
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=56b88b50565cd8b946a2d00b0c83927b7ebb055e
  • article
    https://www.cisa.gov/known-exploited-vulnerabilities-catalog
  • report
    https://access.redhat.com/security/cve/CVE-2023-0461
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-0461
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-0461
  • article
    https://github.com/torvalds/linux/commit/2c02d41d71f90a5168391b6a5f2954112ba2307c