Red Hat Security Advisory: kernel security and bug fix update

Fixed packages 72

Vulnerabilities 3

• High 7.8
  CVE-2023-32233 Public exploit EPSS 13%

  In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused…

  linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu Azure Linux Alpine
  May 8, 2023
• High 7.8
  CVE-2023-35001 Public exploit

  Linux Kernel nftables Out-Of-Bounds Read/Write Vulnerability

  Linux Kernel nftables Out-Of-Bounds Read/Write Vulnerability; nft_byteorder poorly handled vm register contents when CAP_NET_ADMIN is in any user or network namespace

  Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 5, 2023
• 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

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2196105
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2220892
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2225201
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_5622.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-2023-32233
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-32233
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-32233
• article
  https://github.com/torvalds/linux/commit/c1592a89942e9678f7d9c8030efa777c0d57edab
• article
  https://www.openwall.com/lists/oss-security/2023/05/08/4
• report
  https://access.redhat.com/security/cve/CVE-2023-35001
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-35001
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-35001
• article
  https://lore.kernel.org/netfilter-devel/20230705121515.747251-1-cascardo@canonical.com/T/
• article
  https://www.openwall.com/lists/oss-security/2023/07/05/3