Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix possible dereference of uninitialized pointer There is a pointer head_page in rb_meta_validate_events() which is not initialized at the beginning of a function. This pointer can be dereferenced if there is a failure during reader page validation. In this case the control is passed to "invalid" label where the pointer is dereferenced in a loop. To fix the issue initialize orig_head and head_page before calling rb_validate_buffer. Found by Linux Verification Center (linuxtesting.org) with SVACE.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 before a4afdff9c715af50cf6c3f2dc601932c2cea17a2; affected 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 before bc77986f3cb7476637052edf2d87137fa39f153d; affected 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 before d9942396845fef2369478c157b26738fe07142f6; affected 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 before f1547779402c4cd67755c33616b7203baa88420b |
| Linux / Linux | affected 6.12; unaffected 0 before 6.12; unaffected 6.12.114 through 6.12.*; unaffected 6.18.16 through 6.18.*; unaffected 6.19.6 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.