medium5.5
CVE-2026-43272
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix possible dereference of uninitialized pointer There is a pointer head_page…
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 6.12 before 6.18.16 from 6.19 before 6.19.6 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/a4afdff9c715af50cf6c3f2dc601932c2cea17a2
- https://git.kernel.org/stable/c/bc77986f3cb7476637052edf2d87137fa39f153d
- https://git.kernel.org/stable/c/d9942396845fef2369478c157b26738fe07142f6
- https://git.kernel.org/stable/c/f1547779402c4cd67755c33616b7203baa88420b