CVE-2026-89995

Summary

In the Linux kernel, the following vulnerability has been resolved:

dma-direct: return struct page from dma_direct_alloc_from_pool()

Commit 5b138c534fda ("dma-direct: factor out a dma_direct_alloc_from_pool helper") changed dma_direct_alloc_from_pool() to return the CPU address from dma_alloc_from_pool(). That fits dma_direct_alloc(), but dma_direct_alloc_pages() also uses the helper and expects a struct page *.

Fix this by making dma_direct_alloc_from_pool() return the struct page * again, and pass the CPU address back through an out-parameter for the dma_direct_alloc() caller.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5b138c534fda57c2ebc1e6de72578aa1d70788a6 < c3fdb94da43ff23287f85664174c45c45e881a3faffected
LinuxLinux5b138c534fda57c2ebc1e6de72578aa1d70788a6 < 408ff2d5bf555bd3f4c84a2edb95c0690bf9edc8affected
LinuxLinux5b138c534fda57c2ebc1e6de72578aa1d70788a6 < feeb2ef775081a6c188cdd10e7a45369a07ce531affected
LinuxLinux5b138c534fda57c2ebc1e6de72578aa1d70788a6 < 94a04ad732c9f8b9554270fc4038a06737de5c22affected
LinuxLinux5.10affected
LinuxLinux0 < 5.10unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References