Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: hso: fix null-ptr-deref during tty device unregistration Multiple ttys try to claim the same the minor number causing a double unregistration of the same device. The first unregistration succeeds but the next one results in a null-ptr-deref. The get_free_serial_index() function returns an available minor number but doesn't assign it immediately. The assignment is done by the caller later. But before this assignment, calls to get_free_serial_index() would return the same minor number. Fix this by modifying get_free_serial_index to assign the minor number immediately after one is found to be and rename it to obtain_minor() to better reflect what it does. Similary, rename set_serial_by_index() to release_minor() and modify it to free up the minor number of the given hso_serial. Every obtain_minor() should have corresponding release_minor() call.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 before a462067d7c8e6953a733bf5ade8db947b1bb5449; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 before 145c89c441d27696961752bf51b323f347601bee; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 before caf5ac93b3b5d5fac032fc11fbea680e115421b4; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 before 92028d7a31e55d53e41cff679156b9432cffcb36; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 before 4a2933c88399c0ebc738db39bbce3ae89786d723; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 before dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 before 388d05f70f1ee0cac4a2068fd295072f1a44152a; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 before 8a12f8836145ffe37e9c8733dce18c22fb668b66 |
| Linux / Linux | affected 2.6.27; unaffected 0 before 2.6.27; unaffected 4.4.268 through 4.4.*; unaffected 4.9.268 through 4.9.*; unaffected 4.14.232 through 4.14.*; unaffected 4.19.187 through 4.19.*; unaffected 5.4.112 through 5.4.*; unaffected 5.10.30 through 5.10.*; unaffected 5.11.14 through 5.11.*; unaffected 5.12 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a462067d7c8e6953a733bf5ade8db947b1bb5449
- https://git.kernel.org/stable/c/145c89c441d27696961752bf51b323f347601bee
- https://git.kernel.org/stable/c/caf5ac93b3b5d5fac032fc11fbea680e115421b4
- https://git.kernel.org/stable/c/92028d7a31e55d53e41cff679156b9432cffcb36
- https://git.kernel.org/stable/c/4a2933c88399c0ebc738db39bbce3ae89786d723
- https://git.kernel.org/stable/c/dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac
- https://git.kernel.org/stable/c/388d05f70f1ee0cac4a2068fd295072f1a44152a
- https://git.kernel.org/stable/c/8a12f8836145ffe37e9c8733dce18c22fb668b66
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/a462067d7c8e6953a733bf5ade8db947b1bb5449
- https://git.kernel.org/stable/c/145c89c441d27696961752bf51b323f347601bee
- https://git.kernel.org/stable/c/caf5ac93b3b5d5fac032fc11fbea680e115421b4
- https://git.kernel.org/stable/c/92028d7a31e55d53e41cff679156b9432cffcb36
- https://git.kernel.org/stable/c/4a2933c88399c0ebc738db39bbce3ae89786d723
- https://git.kernel.org/stable/c/dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac
- https://git.kernel.org/stable/c/388d05f70f1ee0cac4a2068fd295072f1a44152a
- https://git.kernel.org/stable/c/8a12f8836145ffe37e9c8733dce18c22fb668b66