All vulnerabilities
CVE-2026-98750

Linux: tty: fix saved termios reset race

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 5% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in6b4e15cccfbe03b7c6ae60ff570c401bfb1e51d6Also 1572d86bcf0bcb848d20fc5e5de7ed6963034c2b, 08bf919f041af9de372428bb0c938157ea144164 and 1 moreCVE List
Published18 Oct 2026Updated 21 Oct 2026CVE List

What fixes it

  • 6b4e15cccfbe03b7c6ae60ff570c401bfb1e51d6LinuxCVE List
  • 1572d86bcf0bcb848d20fc5e5de7ed6963034c2bLinuxCVE List
  • 08bf919f041af9de372428bb0c938157ea144164LinuxCVE List
  • 8df07fe93573e9e548d6645273e9bcb6eb74059eLinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

In the Linux kernel, the following vulnerability has been resolved:

tty: fix saved termios reset race

Resetting saved termios state on device registration is needed where a minor number can be reused for an entirely different device and where the old settings may prevent the port from even being opened (e.g. when CLOCAL is not set).

Not all TTY drivers guarantee that the minor number is no longer in use when registering devices however, something which can lead to a use-after-free when closing a TTY (and saving its termios) races with re-registration.

Add a new TTY_DRIVER_RESET_SAVED_TERMIOS flag to request that any saved termios state is reset on registration and only set it for drivers that make sure that the minor number is no longer in use.

Text from CVE List

Affected versions 12

  • Linuxaffected: 93857edd9829e144acb6c7e72d593f6e01aead66 before 6b4e15cccfbe03b7c6ae60ff570c401bfb1e51d6CVE List
  • Linuxaffected: 93857edd9829e144acb6c7e72d593f6e01aead66 before 1572d86bcf0bcb848d20fc5e5de7ed6963034c2bCVE List
  • Linuxaffected: 93857edd9829e144acb6c7e72d593f6e01aead66 before 08bf919f041af9de372428bb0c938157ea144164CVE List
  • Linuxaffected: 93857edd9829e144acb6c7e72d593f6e01aead66 before dcaf0251f847a45861e94c6617024a9455687d2fCVE List
  • Linuxaffected: 93857edd9829e144acb6c7e72d593f6e01aead66 before 8df07fe93573e9e548d6645273e9bcb6eb74059eCVE List
  • Linuxaffected: 4.12CVE List
  • Linuxunaffected: all versions before 4.12CVE List
  • Linuxunaffected: 6.6.160 through 6.6.*CVE List
  • Linuxunaffected: 6.12.113 through 6.12.*CVE List
  • Linuxunaffected: 6.18.56 through 6.18.*CVE List
  • Linuxunaffected: 7.2.10 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 5