Red Hat Security Advisory: kernel security and bug fix update

Fixed packages 25

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-2023-3776 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
  Jul 21, 2023
• High 7.8
  CVE-2023-3812

  Kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags

  An out-of-bounds memory access flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate …

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux
  Jul 24, 2023
• Medium 5.5
  CVE-2023-1095

  In nf_tables_updtable, if nf_tables_table_enable returns an error, nft_trans_destroy is called to free the transaction …

  linux-raspi2 linux-hwe linux-azure linux-riscv Linux Debian Ubuntu Azure Linux
  Feb 28, 2023

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2173973
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2224048
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2225097
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2225201
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_6813.json
• report
  https://access.redhat.com/security/cve/CVE-2023-1095
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-1095
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-1095
• 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-2023-3812
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-3812
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-3812
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=363a5328f4b0