CVE-2022-49991

mm/hugetlb: avoid corrupting page->mapping in hugetlb_mcopy_atomic_pte

Description

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: avoid corrupting page->mapping in hugetlb_mcopy_atomic_pte In MCOPY_ATOMIC_CONTINUE case with a non-shared VMA, pages in the page cache are installed in the ptes. But hugepage_add_new_anon_rmap is called for them mistakenly because they're not vm_shared. This will corrupt the page->mapping used by page cache code.

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/da60ddd80d09f8371fbba1a238a4b318d13ba698
https://git.kernel.org/stable/c/3ada1b3e58db255a14ec73a59d7913e84dc5a8a4
https://git.kernel.org/stable/c/ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6

Frequently Asked Questions

What is the severity of CVE-2022-49991?: CVE-2022-49991 has not yet been assigned a CVSS score.
How to fix CVE-2022-49991?: To fix CVE-2022-49991, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49991 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49991 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49991?: CVE-2022-49991 affects Linux Linux, Linux Linux.

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