Red Hat Security Advisory: kpatch-patch security update

Fixed packages 9

Vulnerabilities 4

• High 7.9
  CVE-2023-0266 Exploited Public exploit

  Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel

  A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. …

  Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jan 30, 2023

  KEV Mar 30, 2023
• High 7.8
  CVE-2023-0386 Exploited Public exploit

  A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities w…

  linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu Azure Linux
  Mar 22, 2023

  KEV Jun 17, 2025
• High 7.8
  CVE-2022-4378

  A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters …

  linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu
  Jan 5, 2023
• High 7.0
  CVE-2023-1476

  Kpatch: mm/mremap.c: incomplete fix for cve-2022-41222

  A use-after-free flaw was found in the Linux kernel’s mm/mremap memory address space accounting source code. This issue occurs due to a race condition between rmap walk and mremap, allowing a local user to crash the system or potentially escalate their privil…

  Red Hat Red Hat Enterprise Linux 8 Linux
  Nov 3, 2023

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2152548
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2159505
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2163379
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2176035
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_1659.json
• report
  https://access.redhat.com/security/cve/CVE-2022-4378
• advisory
  https://www.cve.org/CVERecord?id=CVE-2022-4378
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2022-4378
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-6.0/proc-avoid-integer-type-confusion-in-get_proc_long.patch
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-6.0/proc-proc_skip_spaces-shouldn-t-think-it-is-working-on-c-strings.patch
• article
  https://seclists.org/oss-sec/2022/q4/178
• report
  https://access.redhat.com/security/cve/CVE-2023-0266
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-0266
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-0266
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=56b88b50565cd8b946a2d00b0c83927b7ebb055e
• article
  https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• report
  https://access.redhat.com/security/cve/CVE-2023-0386
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-0386
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-0386
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a
• report
  https://access.redhat.com/security/cve/CVE-2023-1476
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-1476
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-1476
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=97113eb39fa7972722ff490b947d8af023e1f6a2