Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: hugetlbfs: don't delete error page from pagecache This change is very similar to the change that was made for shmem [1], and it solves the same problem but for HugeTLBFS instead. Currently, when poison is found in a HugeTLB page, the page is removed from the page cache. That means that attempting to map or read that hugepage in the future will result in a new hugepage being allocated instead of notifying the user that the page was poisoned. As [1] states, this is effectively memory corruption. The fix is to leave the page in the page cache. If the user attempts to use a poisoned HugeTLB page with a syscall, the syscall will fail with EIO, the same error code that shmem uses. For attempts to map the page, the thread will get a BUS_MCEERR_AR SIGBUS. [1]: commit a76054266661 ("mm: shmem: don't truncate page if memory failure happens")
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.15.80 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/30571f28bb35c826219971c63bcf60d2517112edPatch
- https://git.kernel.org/stable/c/8625147cafaa9ba74713d682f5185eb62cb2aedbPatch
- https://git.kernel.org/stable/c/ec667443b2dbc6cdbbac4073e51a17733158ec6aPatch
FAQ
What is CVE-2022-49828?
CVE-2022-49828 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: hugetlbfs: don't delete error page from pagecache This change is very similar to the change that was made for shmem [1], and it so...
How severe is CVE-2022-49828?
CVE-2022-49828 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-2022-49828?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.