Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm/page_alloc: don't call pfn_to_page() on possibly non-existent PFN in split_large_buddy() In split_large_buddy(), we might call pfn_to_page() on a PFN that might not exist. In corner cases, such as when freeing the highest pageblock in the last memory section, this could result with CONFIG_SPARSEMEM && !CONFIG_SPARSEMEM_EXTREME in __pfn_to_section() returning NULL and and __section_mem_map_addr() dereferencing that NULL pointer. Let's fix it, and avoid doing a pfn_to_page() call for the first iteration, where we already have the page. So far this was found by code inspection, but let's just CC stable as the fix is easy.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.10, < 6.12.7 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/4234ca9884bcae9e48ed38652d91696ad5cd591dPatch
- https://git.kernel.org/stable/c/faeec8e23c10bd30e8aa759a2eb3018dae00f924Patch
FAQ
What is CVE-2024-57881?
CVE-2024-57881 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: mm/page_alloc: don't call pfn_to_page() on possibly non-existent PFN in split_large_buddy() In split_large_buddy(), we might call ...
How severe is CVE-2024-57881?
CVE-2024-57881 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-2024-57881?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.