Red Hat Security Advisory: kernel security and bug fix update

Fixed packages 59

Vulnerabilities 10

• High 7.8
  CVE-2023-31248

  Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability

  Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and 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-2023-35001 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-2023-35788 Public exploit

  An issue was discovered in fl_set_geneve_opt in net/sched/cls_flower.c in the Linux kernel before 6.3.7. It allows an o…

  linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu Azure Linux
  Jun 16, 2023
• High 7.8
  CVE-2023-53492

  netfilter: nf_tables: do not ignore genmask when looking up chain by id

  In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: do not ignore genmask when looking up chain by id When adding a rule to a chain referring to its ID, if that chain had been deleted on the same batch, the rule might end…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Oct 1, 2025
• Medium 5.6
  CVE-2023-1998 Public exploit

  Spectre v2 SMT mitigations problem in Linux kernel

  The Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel sti…

  Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Apr 21, 2023
• Medium 5.5
  CVE-2023-28327

  A NULL pointer dereference flaw was found in the UNIX protocol in net/unix/diag.c In unix_diag_get_exact in the Linux K…

  linux-raspi2 linux-hwe linux-azure linux-riscv Linux Debian Ubuntu Azure Linux
  Apr 19, 2023
• Medium 5.5
  CVE-2023-3161

  A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing font->width and font->height gr…

  linux-raspi2 linux-hwe linux-azure linux-riscv Linux Debian Ubuntu Azure Linux
  Jun 12, 2023
• Medium 5.5
  CVE-2023-53245

  scsi: storvsc: Fix handling of virtual Fibre Channel timeouts

  In the Linux kernel, the following vulnerability has been resolved: scsi: storvsc: Fix handling of virtual Fibre Channel timeouts Hyper-V provides the ability to connect Fibre Channel LUNs to the host system and present them in a guest VM as a SCSI device. I/…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Sep 15, 2025
• Unscored —
  CVE-2023-1206 Public exploit

  A hash collision flaw was found in the IPv6 connection lookup table in the Linux kernel’s IPv6 functionality when a use…

  linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu Azure Linux
  Jun 30, 2023
• Unscored —
  CVE-2023-4128 Public exploit Rejected

  ** REJECT ** DO NOT USE THIS CVE RECORD. ConsultIDs: CVE-2023-4206, CVE-2023-4207, CVE-2023-4208. Reason: This record i…

  linux-raspi2 linux-hwe linux-azure linux-riscv Ubuntu
  Aug 10, 2023

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2175903
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2177382
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2187257
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2213485
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2215768
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2220892
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2220893
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2225511
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_5604.json
• report
  https://access.redhat.com/security/cve/CVE-2023-1206
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-1206
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-1206
• article
  https://git.kernel.org/linus/d11b0df7ddf1831f3e170972f43186dad520bfcc
• report
  https://access.redhat.com/security/cve/CVE-2023-1998
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-1998
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-1998
• article
  https://github.com/google/security-research/security/advisories/GHSA-mj4w-6495-6crx
• report
  https://access.redhat.com/security/cve/CVE-2023-3161
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-3161
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-3161
• report
  https://access.redhat.com/security/cve/CVE-2023-4128
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2261965
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-4128
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-4128
• article
  https://access.redhat.com/security/cve/CVE-2023-4206
• article
  https://access.redhat.com/security/cve/CVE-2023-4207
• article
  https://access.redhat.com/security/cve/CVE-2023-4208
• report
  https://access.redhat.com/security/cve/CVE-2023-28327
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-28327
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-28327
• article
  https://lore.kernel.org/netdev/CAO4mrffDLiqo3hWRC=uP_E-3VQSV4O=1BiOaS0Z1J0GHLVgzVQ@mail.gmail.com/T/#m3082ca8922ae87cbb9e460a6c65fe09eee2c99b9
• report
  https://access.redhat.com/security/cve/CVE-2023-31248
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-31248
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-31248
• article
  https://lore.kernel.org/netfilter-devel/20230705121627.GC19489@breakpoint.cc/T/
• article
  https://www.openwall.com/lists/oss-security/2023/07/05/2
• article
  https://www.zerodayinitiative.com/advisories/ZDI-23-899/
• report
  https://access.redhat.com/security/cve/CVE-2023-35001