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CVE-2026-90334

tty: clear cdev pointer after cdev_add() failure

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: tty: clear cdev pointer after cdev_add() failure tty_cdev_add() drops the cdev reference when cdev_add() fails, but leaves driver->cdevs[index] pointing to freed memory. tty_unregister_device() later passes that stale pointer to cdev_del(), causing a use-after-free. Clear the slot after dropping the reference.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From c1a752ba2d6b8a52879c7ab637cff38359ea9827 · fixed in fb1de260033c215dba438973d82b48562bdc86bb; From c1a752ba2d6b8a52879c7ab637cff38359ea9827 · fixed in e9e64dd02fd68776afda00777591eca0c3984285; From c1a752ba2d6b8a52879c7ab637cff38359ea9827 · fixed in 33a44333a9dfda044b0e233399b12ead7f8a90ae; From c1a752ba2d6b8a52879c7ab637cff38359ea9827 · fixed in d331c63570af61ef7aaf516b64a8d6f47518a3a4; From c1a752ba2d6b8a52879c7ab637cff38359ea9827 · fixed in a83fcddf3c75d004f12aa13555bb73da19fb75a9; From c1a752ba2d6b8a52879c7ab637cff38359ea9827 · fixed in 4f6bd79bb7e55095f09bec9b4eb6c09df1306116; From c1a752ba2d6b8a52879c7ab637cff38359ea9827 · fixed in 5c5a795bf6248fe96f96dd9fd79d66bbb4a92077; From c1a752ba2d6b8a52879c7ab637cff38359ea9827 · fixed in 6645856f0df3aeecd45519cb611415b4b89c2223

  • Linux Linux

    4.3

  • KernelLinux

    From 4.3.0 · fixed in 5.10.270; From 5.11.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.52; From 6.19.0 · fixed in 7.2.6

References 8

git.kernel.org