AZL-47937
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-47937.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-47937
- Upstream
- Published
- 2024-08-17T10:15:10Z
- Modified
- 2026-04-01T05:15:59.130625Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- CVE-2024-43856 affecting package kernel for versions less than 5.15.167.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
dma: fix call order in dmamfreecoherent
dmamfreecoherent() frees a DMA allocation, which makes the freed vaddr available for reuse, then calls devres_destroy() to remove and free the data structure used to track the DMA allocation. Between the two calls, it is possible for a concurrent task to make an allocation with the same vaddr and add it to the devres list.
If this happens, there will be two entries in the devres list with the same vaddr and devresdestroy() can free the wrong entry, triggering the WARNON() in dmam_match.
Fix by destroying the devres entry before freeing the DMA allocation.
kokonut //net/encryption http://sponge2/b9145fe6-0f72-4325-ac2f-a84d81075b03
- References