CVE-2024-43856High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: dma: fix call order in dmam_free_coherent dmam_free_coherent() frees a DMA allocation, which makes the freed vaddr available for reuse, then calls devres_destroy() to …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.4%
In the Linux kernel, the following vulnerability has been resolved:
dma: fix call order in dmam_free_coherent
dmam_free_coherent() 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 devres_destroy() can free the wrong entry, triggering the WARN_ON() in dmam_match.
Fix by destroying the devres entry before freeing the DMA allocation.
kokonut //net/encryption http://sponge2/b9145fe6-0f72-4325-ac2f-a84d81075b03
linux_kernel >= 2.6.21, < 4.19.320linux_kernel >= 4.20, < 5.4.282linux_kernel >= 5.5, < 5.10.224linux_kernel >= 5.11, < 5.15.165linux_kernel >= 5.16, < 6.1.103linux_kernel >= 6.2, < 6.6.44linux_kernel >= 6.7, < 6.10.3Upgrade past the affected range:
linux_kernel 6.10.3Connected by shared product, vendor, weakness, or advisory.
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