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OpenAdvisories
High RHSA-2023:7431 4 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Sep 13, 2024 · Updated Aug 7, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-core 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-debug 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-debug-core 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-debug-debuginfo 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-debug-devel 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-debug-kvm 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-debug-modules 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-debug-modules-extra 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-debuginfo 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-devel 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-kvm 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-modules 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::nfv kernel-rt-modules-extra 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-core 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-debug 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-debug-core 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-debug-debuginfo 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-debug-devel 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-debug-modules 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-debug-modules-extra 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-debuginfo 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-devel 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-modules 0:4.18.0-193.119.1.rt13.170.el8_2
Red Hat · RHEL 8.2 TUS rhel_tus:8.2::realtime kernel-rt-modules-extra 0:4.18.0-193.119.1.rt13.170.el8_2

Vulnerabilities 4

  • High 7.8
    CVE-2023-1829 Public exploit

    Use-after-free in tcindex (traffic control index filter) in the Linux Kernel

    A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting…

    Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2023-3609 Public exploit

    Use-after-free in Linux kernel's net/sched: cls_u32 component

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the refe…

    Linux kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2023-3776 Public exploit

    Use-after-free in Linux kernel's net/sched: cls_fw component

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the refere…

    Linux kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2023-4004

    Kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove()

    A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their pr…

    Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2188470
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2225097
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2225201
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2225275
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_7431.json
  • report
    https://access.redhat.com/security/cve/CVE-2023-1829
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-1829
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-1829
  • article
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8c710f75256bb3cf05ac7b1672c82b92c43f3d28
  • report
    https://access.redhat.com/security/cve/CVE-2023-3609
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-3609
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-3609
  • article
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc
  • report
    https://access.redhat.com/security/cve/CVE-2023-3776
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-3776
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-3776
  • article
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=0323bce598eea038714f941ce2b22541c46d488f
  • report
    https://access.redhat.com/security/cve/CVE-2023-4004
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-4004
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-4004
  • article
    https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/