Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: do not call vma_add_reservation upon ENOMEM sysbot reported a splat [1] on __unmap_hugepage_range(). This is because vma_needs_reservation() can return -ENOMEM if allocate_file_region_entries() fails to allocate the file_region struct for the reservation. Check for that and do not call vma_add_reservation() if that is the case, otherwise region_abort() and region_del() will see that we do not have any file_regions. If we detect that vma_needs_reservation() returned -ENOMEM, we clear the hugetlb_restore_reserve flag as if this reservation was still consumed, so free_huge_folio() will not increment the resv count. [1] https://lore.kernel.org/linux-mm/[email protected]/T/#ma5983bc1ab18a54910da83416b3f89f3c7ee43aa
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.9, < 6.9.5 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/8daf9c702ee7f825f0de8600abff764acfedea13Mailing ListPatch
- https://git.kernel.org/stable/c/aa998f9dcb34c28448f86e8f5490f20d5eb0eac7Mailing ListPatch
- https://git.kernel.org/stable/c/8daf9c702ee7f825f0de8600abff764acfedea13Mailing ListPatch
- https://git.kernel.org/stable/c/aa998f9dcb34c28448f86e8f5490f20d5eb0eac7Mailing ListPatch
FAQ
What is CVE-2024-39477?
CVE-2024-39477 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: do not call vma_add_reservation upon ENOMEM sysbot reported a splat [1] on __unmap_hugepage_range(). This is because ...
How severe is CVE-2024-39477?
CVE-2024-39477 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-2024-39477?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.