Red Hat Security Advisory: kernel security update

Fixed packages 19

Vulnerabilities 4

• 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
  Jul 21, 2023
• High 7.8
  CVE-2023-4921

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

  A use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. When the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free in qfq_dequeue()…

  Linux kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 12, 2023
• High 7.0
  CVE-2023-42753

  Kernel: netfilter: potential slab-out-of-bound access due to integer underflow

  An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer o…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux
  Sep 25, 2023
• Unscored —
  CVE-2023-45871

  An issue was discovered in drivers/net/ethernet/intel/igb/igb_main.c in the IGB driver in the Linux kernel before 6.5.3…

  linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu Azure Linux
  Oct 15, 2023

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2225201
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2239843
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2244723
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2245514
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_0999.json
• 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-2023-4921
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-4921
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-4921
• article
  https://github.com/torvalds/linux/commit/8fc134fee27f2263988ae38920bc03da416b03d8
• report
  https://access.redhat.com/security/cve/CVE-2023-42753
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-42753
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-42753
• article
  https://seclists.org/oss-sec/2023/q3/216
• report
  https://access.redhat.com/security/cve/CVE-2023-45871
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-45871
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-45871
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=bb5ed01cd2428cd25b1c88a3a9cba87055eb289f