Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Fixed packages 91

Vulnerabilities 3

• Critical 9.8
  CVE-2026-64387

  smb: client: fix query directory replay double-free

  In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query directory replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_directory_init() fails before the next…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 25, 2026
• High 7.8
  CVE-2026-52933

  io_uring/poll: fix signed comparison in io_poll_get_ownership()

  In the Linux kernel, the following vulnerability has been resolved: io_uring/poll: fix signed comparison in io_poll_get_ownership() io_poll_get_ownership() uses a signed comparison to check whether poll_refs has reached the threshold for the slowpath: if (unl…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jun 24, 2026
• Medium 6.8
  CVE-2026-53196

  USB: serial: io_ti: fix heap overflow in get_manuf_info()

  In the Linux kernel, the following vulnerability has been resolved: USB: serial: io_ti: fix heap overflow in get_manuf_info() get_manuf_info() reads le16_to_cpu(rom_desc->Size) bytes from the device I2C EEPROM into a buffer allocated with kmalloc_obj(), which…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jun 25, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492097
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492750
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2507046
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_67114.json
• report
  https://access.redhat.com/security/cve/CVE-2026-52933
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-52933
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-52933
• article
  https://lore.kernel.org/linux-cve-announce/2026062433-CVE-2026-52933-815c@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-53196
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-53196
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-53196
• article
  https://lore.kernel.org/linux-cve-announce/2026062559-CVE-2026-53196-bcc6@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-64387
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-64387
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-64387
• article
  https://lore.kernel.org/linux-cve-announce/2026072526-CVE-2026-64387-ff1a@gregkh/T