# CVE-2024-49872: linux: In the Linux kernel, the following vulnerability has been resolved:  mm/gup: fix memfd_pin_folios alloc race panic  I...

CVE-2024-49872 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-49872, released October 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-49872
- Priority: Routine
- CVSS: 4.7 (medium)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 21, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  mm/gup: fix memfd_pin_folios alloc race panic  If memfd_pin_folios tries to create a hugetlb page, but someone else already did, then folio gets the value -EEXIST here:          folio = memfd_alloc_folio(memfd, start_idx);         if (IS_ERR(folio)) {                 ret = PTR_ERR(folio);                 if (ret != -EEXIST)                         goto err;  then on the next trip through the "while start_idx" loop we panic here:          if (folio) {                 folio_put(folio);  To fix, set the folio to NULL on error.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.11.4-1 | [DEBIAN-CVE-2024-49872](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49872.md) | Oct 21, 2024 |
| Linux | linux Debian 14 | 6.11.4-1 | [DEBIAN-CVE-2024-49872](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49872.md) | Oct 21, 2024 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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