Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.12, < 6.18.16 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/bc77986f3cb7476637052edf2d87137fa39f153dPatch
- https://git.kernel.org/stable/c/d9942396845fef2369478c157b26738fe07142f6Patch
- https://git.kernel.org/stable/c/f1547779402c4cd67755c33616b7203baa88420bPatch
FAQ
What is CVE-2026-43272?
CVE-2026-43272 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 ...
How severe is CVE-2026-43272?
CVE-2026-43272 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43272?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.