CVE-2024-49872
Severity CVSS v4.0:
Pending analysis
Type:
CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Publication date:
21/10/2024
Last modified:
13/11/2024
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
mm/gup: fix memfd_pin_folios alloc race panic<br />
<br />
If memfd_pin_folios tries to create a hugetlb page, but someone else<br />
already did, then folio gets the value -EEXIST here:<br />
<br />
folio = memfd_alloc_folio(memfd, start_idx);<br />
if (IS_ERR(folio)) {<br />
ret = PTR_ERR(folio);<br />
if (ret != -EEXIST)<br />
goto err;<br />
<br />
then on the next trip through the "while start_idx" loop we panic here:<br />
<br />
if (folio) {<br />
folio_put(folio);<br />
<br />
To fix, set the folio to NULL on error.
Impact
Base Score 3.x
4.70
Severity 3.x
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.11 (including) | 6.11.3 (excluding) |
To consult the complete list of CPE names with products and versions, see this page