RDMA/umem: Fix truncation for block sizes >= 4G
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
RDMA/umem: Fix truncation for block sizes >= 4G
When the iommu is used the linearization of the mapping can give a single
block that is very large split across multiple SG entries.
When __rdma_block_iter_next() reassembles the split SG entries it is
overflowing the 32 bit stack values and computed the wrong DMA addresses
for blocks after the truncation.
Use the right types to hold DMA addresses.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/15fe76e23615f502d051ef0768f86babaf08746chttps://git.kernel.org/stable/c/2ff4b7817e5b78070c30f5fb5e678e452a2628b3https://git.kernel.org/stable/c/8fe0231adebe086c8a459c790944ac026cd99c6ehttps://git.kernel.org/stable/c/ac1aad8e1281534ce936c250f68084fc79c5469ehttps://git.kernel.org/stable/c/afd35fec9297195b759078745549c2671223f24fhttps://git.kernel.org/stable/c/baf8685bcf56dc1efb44b8f6a57c42516e549068https://git.kernel.org/stable/c/cc644d5608e3b0dadc970bd6e6aa26b91ea07d0fhttps://git.kernel.org/stable/c/dee2a49adeeb2a5e16a3fc858fa21b841c519802