In the Linux kernel, the following vulnerability has been resolved: tty: skip cdev_del() when no cdev is registered TTY device registration can fail before a cdev is allocated.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · git.kernel.org
• Repository · git.kernel.org
• Repository · git.kernel.org

Timeline

Detection, updates, and resolution for this record.

1. Sep 17, 2026 · NIST NVD

   Detected

   In the Linux kernel, the following vulnerability has been resolved: tty: skip cdev_del() when no cdev is registered TTY device registration can fail before a cdev is allocated. Serial core keeps the port so setserial can still use it, and later removal passes the NULL cdev slot to cdev_del(), causing a NULL-pointer dereference. Only delete the cdev when the slot is not NULL.

2. Oct 15, 2026 · NIST NVD

   Updated

   In the Linux kernel, the following vulnerability has been resolved: tty: skip cdev_del() when no cdev is registered TTY device registration can fail before a cdev is allocated. Serial core keeps the port so setserial can still use it, and later removal passes the NULL cdev slot to cdev_del(), causing a NULL-pointer dereference. Only delete the cdev when the slot is not NULL.

Sources

• CVE.orgVulnerability recordCVE-2026-90335

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-90335

  30-day exploitation probability 0.2%

  first.org
• NIST NVDVulnerability recordCVE-2026-90335

  In the Linux kernel, the following vulnerability has been resolved: tty: skip cdev_del() when no cdev is registered TTY device registration can fail before a cdev is allocated. Serial core keeps the port so setserial can still use it, and later removal passes the NULL cdev slot

  nvd.nist.gov

References

• Reference · git.kernel.org
• Reference · git.kernel.org
• Reference · git.kernel.org