# CVE-2022-49828: linux: In the Linux kernel, the following vulnerability has been resolved:  hugetlbfs: don't delete error page from pagecach...

CVE-2022-49828 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49828, released May 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49828
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2025

## 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")

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.10-1 | [DEBIAN-CVE-2022-49828](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49828.md) | May 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.10-1 | [DEBIAN-CVE-2022-49828](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49828.md) | May 1, 2025 |
| Linux | linux Debian 14 | 6.0.10-1 | [DEBIAN-CVE-2022-49828](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49828.md) | May 1, 2025 |

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